Why is My Transmission Shifting Hard?

Automatic transmissions are a mystery to most.  Many mechanics will quickly tackle a timing belt job or a head gasket replacement, but when it comes to transmission problems even the most seasoned mechanics often shy away.  When they work correctly, we usually don’t think about them because they are automatic.  When they don’t work correctly, it usually goes past annoying and leaves you stranded.

Hard Shifting TransmissionAutomatic transmissions use a planetary gear system to transfer power and to create different gear ratios and a reverse option.  A planetary gear set has a single center gear, a large ring gear around that with internal teeth and multiple small gears in between the center and ring gears.  In an automobile transmission, there usually are two sets of these gear systems.  This arrangement allows for a variety of gear ratios that can be shifted very easily, but if one part of the system fails, it often renders the whole system inoperable.

Like many problems that arise in your car, there are usually early warning signs to let you know that one of these systems is about to fail.  Luckily the automatic transmission in your vehicle has some early warning signs of its own.

Automatic Transmission Failure Early Warning Signs:

  • Low fluid level on the dipstick
  • Dark or discolored fluid
  • Whining or grinding noises
  • Loose shifting or over revving
  • Hard or jerky shifting

The best way you can keep tabs on your transmission and make sure it last as long as possible is to make sure it always has enough clean transmission fluid.  Most passenger vehicles today have a dip stick in the engine bay for the automatic transmission.  Check your manual for the location of the dip stick and the recommended procedure for checking the level.  On most vehicles the transmission level should be checked with the engine operating and there will be a “cold” and “hot” range.  It is easiest to check the fluid level in the morning after your car has sat all night and is cold.  In this case use the “cold” range.  If you’ve been driving and want to check your fluid level, try operating your vehicle in the lower gear to ensure the transmission fluid is sufficiently hot and use the “hot” range on the dip stick.

Leaking TransmissionWhile checking the fluid level, check the fluid for discoloration, particles or a burnt smell.  If any of these are evident, it may be time to change your transmission fluid.  You should always change your transmission fluid at the factory recommended interval using the recommended fluid for your vehicle.  If you use your vehicle for towing, drive in the city or in stop and go traffic or live in a significantly warm or cold place you may need to change your fluid 10% to 25% more often.

Another way to diagnose an impending transmission problem is if it starts making whining or grinding noises.  This would single a large problem and the vehicle should be taken to a deal or transmission repair shop immediately.

How the transmission shifts compared to normal is another way you can tell if something is going wrong in your automatic transmission.  An automatic transmission shifts gears by changing which of the planetary gears are moving, held stationary or coupled to the input or output shafts.  These changes are made by a series of clutches and bands and are activated by pressure changes of the transmission fluid.  As these clutches and bands wear out it can cause your shifts to feel sloppy, take longer or even have the engine over rev.  The wear of these clutches and bands is accelerated by having dirty transmission fluid circulating cause excessive wear and premature failure.  In this case, a transmission rebuild is the only thing that can solve the problem.

If you are experience hard transmission shifts, it is possible that the only problem is a low transmission fluid level.  Low transmission fluid level can change the operating pressures of the transmission as well as reduce the amount of lubricant present between the clutches and bands and raise transmission temperatures.  All these things can cause hard or jerky shifting.  You need to identify why the transmission has a low fluid level and refill it as soon as possible.

If your transmission has a low fluid level, it is likely due to a leak in the transmission.  Leaks are most commonly found input or output shafts on the transmission because this is where the moving parts exit the case.  There will be a rubber seal around each shaft that can wear, shrink or get brittle over time.  These seals can often be difficult and expensive to replace because of their location on the vehicle.  Rather than replacing them, add BlueDevil Transmission Sealer to your automatic transmission fluid.  BlueDevil Transmission Sealer is specially formulated to restored dried, cracked or shrunken seals and gaskets in your transmission without harming the transmission.  BlueDevil Transmission Sealer is guaranteed to form a permanent seal.  BlueDevil products are safe for your vehicle and can remain in the system until your next fluid change.

BlueDevil Transmission Sealer

Look for the early warning signs of transmission problems to save yourself money and a headache down the road.  If you find a low fluid level, use BlueDevil Transmission Sealer immediately!  You can pick up BlueDevil Transmission Sealer at your local auto parts stores:

  • NAPA
  • Autozone
  • Advance Auto Parts
  • O’Reilly Auto Parts
  • Car Quest Auto Parts
  • Pep Boys
  • Bennett Auto Supply
  • Prime Automotive

You can also purchase BlueDevil Transmission Sealer here: Transmission Sealer

Pictures provided by: www.caranddriver.com, www.jeepsunlimited.com and www.padoniaautoservice.com

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181 responses to “Why is My Transmission Shifting Hard?

  1. I have a 2001 ford ranger. its shifting roughly, when i come to a stop, the truck wants to keep going, and as a result, the truck stalls out. Also, when im am traveling forward at slow speeds(35 mph or less) truck seems to not shift down when slowing down, and when i accerlerater the truck is slugish( as if the transmission is in a higher gear)

    1. t sounds like you may have some issues with your transmission that are beyond what our Transmission Sealer is intended for. Â Our product is specifically intended for a leaking seal within the transmission, not slippage or rough shifting.

    2. I’ve actually read something about the torque converter not releasing it’s clutch. This might help or not

  2. I drive an automatic 1995 Mitsubishi 3000GT. When driving the car fist thing in the morning, it jerks and shifts late from first to second gear, and shifts late from 2nd to 3rd. But, when the car is warmed up, the problem goes away. I already changed the fluid and filter and used the proper procedure to check the level of the fluid which seems correct. I tried Lucas Transmission fix and it helped a little. Again, this only happens when the car sits for awhile like overnight. Though, when I drive the car for 25 minutes or more, the level of the fluid is above the hot line by 3/4 of an inch… So how long should I drive in the morning to check the fluid level?

    1. William,

      It does’t sound like you are losing fluid as our products are specifically for leaks in your system. It sounds like you may have more going on then what our products are intended for and it would be hard for us to suggest a remedy for what you are describing. You may want to consider discussing with a transmission specialist.

      -BDP

    2. when warming your car up in the morning put it in neutral. either with the hand brake on or blocks by the tires. I was told that park doesn’t allow the transmission to move at all, but neutral allows the transmission to work, warming it up. hopefully making it shift better.

    3. Hi! The transmission shifts hight (4 to 5 gear) when its cold this is normal it shoft high bc it needs to warm up faster once its hot it shifts normal. Do not worry. Just make dure your fluid is clean and in the proper level.

    4. Your car needs to be running when you check your fluid level. You may have too much fluid in your transmission drain some out.

  3. I have a 1988 Chevy s10 pickup. When I get up to 30mph it stalls a little bit and then after about 5 seconds it’ll start speeding up again. I don’t think it’s anything major but I also don’t think my pickup is suppose to do that. Any tips?

    1. Unfortunately, it could be a number of things and it’s impossible to nail down exactly what it is without seeing the car. I’d recommend taking it to a licensed mechanic in your area for a complete diagnosis. If you need further assistance with any of our products, please give our tech line a call at 1.888.863.0426.

      -BDP

    2. Sounds like your throttle body may need servicing. Your IACV (idle air control valve) is probably dirty or in need of replacement. I would start with disassembling and cleaning your throttle body.

  4. I have a 2000 Dodge Dakota that I just had a new transmission put in it. But when I let my foot off the gas, it still jerks hard when going into gear. What could be the problem?

    1. It sounds like you need to have your vehicle examined by a certified mechanic. Unfortunately, we do not manufacture a product that will help with hard shifting.

  5. I have a 93 Chevy and I refilled the fluid but when it shifts from first to second it jerks bad then it smooths out but the filter hasn’t been changed since 93

  6. I have a 1998 ford expedition and it runs good. the only problem is that is shifts hard from 2nd to 3rd. all of the other gears are perfect except that one. Any suggestions?

    1. Thanks for your question about your Expedition, and we’re sorry you are having trouble with it. The first thing to do is check for proper transmission fluid level using the yellow dip stick on the passanger side of your engine while the engine is running. If you have the proper fluid level and it has been changed at the factory recommended intervals, it is possible that the 2nd to 3rd gear shift is getting worn. 3rd gear is shifted to the most in your transmission unless you do a lot of highway driving, and is often one of the first gears to wear out in both automatic and manual transmissions, so it is likely that it is wearing faster than the other gears and could be an indication that your transmission is reaching the end of its life. If your fluid levels and condition are acceptable we recommend having your Expedition looked at by a transmission specialist.

  7. I have a 2001 honda accord ex . I just changed the slave cylinder and master with brand new ones due to they were leaking and ever since then I can not go into first gear and it is hard sometimes to shift to another. What may be the problem?

    1. Macy,

      Thanks for your question on our article “Why is My Transmission Shifting Hard?”! I’m assuming by your question that your Accord has a 5 speed manual transmission. It sounds like you just have air stuck in your clutch system that needs to be removed so the clutch system can work properly.

      Check out our article about how to bleed your clutch here: https://www.gobdp.com/blog/bleed-clutch/. If you have any more questions, feel free to comment on the bottom of that article.

      Thanks again!
      -BlueDevil Pro

  8. My 92 chevy silverado is having problems shifting correctly, it shifts at high rpms but doesnt slip or jerk. Any idea what it could be?

    1. To Matt:
      Matt, thanks for your question, and thanks for reading our article! For your 92 Chevy there may be a few possible causes for it shifting late. The first thing to check would be the kickdown cable adjustment. There is a cable that runs from the throttle linkage down to the transmission. When you step on the gas it opens the throttle but also pulls this cable to help your transmission decide if it needs to downshift. If this cable is not adjusted properly it could cause the problem you are having. Another cause may be the throttle valve or the governor valve in your transmission. These two valves control the pressure in the transmission and tell it when to shift. If there is debris from old fluid or wearing parts in your transmission fluid these valves may be sticking open causing the late shift. A transmission flush may help with this problem, or the valves may need to be replaced. Thanks again for your questions and let us know if we can do anything else! -BlueDevil Pro

    2. I have a 1996 silverado, I just picked it up today from the guy I was letting use it told me he put a “brand new” transmission in it about a month or so ago. I had to drive it from Virginia to Pennsylvania and about 2 hours into my drive I notices the fluid wasn’t reading on dipstick. I put 3 quarts in it to top it off and kept going. Checked it periodically and it seemed fine. Shifted smoothly all trip until I got about 20 minutes from home. Then it started to jolt when I let off the gas and sometimes when it shifted from first to second gear. I then filled the fluid again, kept going and it still had the problem. Any suggestions? The engine also has a misfire, don’t know if that has anything to do with the jerking.

      1. Jarrett-

        Thanks for your question about your 1996 Silverado. Whether the transmission he installed was new or remanufactured, it definitely has a significant leak. The shifting issues you described having when you got close to home are consistent with a low transmission fluid level. The first place to start would be to add BlueDevil Transmission Sealer (available here: http://store.gobdp.com/transmission-sealer-00236/) to seal your leak so you don’t have to keep adding fluid. It may take a few days for BlueDevil to seal the leak so keep an eye on the fluid level until it stops dropping.

        As for your truck misfiring, start with changing the spark plugs and add BlueDevil Fuel System Cleaner (available here: http://store.gobdp.com/fuel-system-cleaner-00202/) to make sure your injectors are clean and firing properly and your misfire should be cured as well.

        -BDP

  9. I have a 2002 Buick century and I deliver pizzas when I’m in a lot of stop and go traffic where I have to go a little bit then stop suddenly, when I start to finally get up to speed it shifts hard had bad oil and got that changed but also added more tranny fluid

    1. Troy, its good that you got the oil changed, stop and go driving is rough on a vehicle so it requires more frequent oil changes. Have you tried getting your transmission fluid flushed? New transmission fluid may help your hard shifting problem. Also, if you had to add more transmission fluid you may have a leak. Consider checking your transmission fluid level regularly and if you discover a leak add BlueDevil Transmission Sealer to stop the leak. You can pickup BlueDevil Transmission sealer here: http://bit.ly/16JIVMM

  10. I have a 2005 volkswagen jetta GL. I just recently replaced the transmission pan gasket the filter and the fluid cause theres was a small leak and it had a jerky shift. i also replaced the flex pipe. however it still jerks if not a little worse when going from a stop. is it as simple as adding bluedevil transmission sealer or what would u think could be the issue? article really helped thx 🙂

    1. Scott-

      If the transmission is still leaking at all then yes, we would definitely recommend adding the recommended amount of BlueDevil Transmission Sealer. If the jerking is being originated from a faulty part or some other factor then this may not work but it will at least address the leak.

  11. I own a 06 saturn relay did a transmission and filter change due to dirty transmission oil, a few days later it started shifting hard but only in first gear, after all gears shift in normally. Any ideas??

    1. Christina-

      It was a great idea to get your transmission fluid and filter changed and to keep up with the regular maintenance of your Saturn. Since this happened just after the new fluid was added, We recommend checking your transmission fluid level to make sure your mechanic added the proper amount. We have also posted another article that relates to your problem called “Hard Shifting Transmissions”, which can be seen here: https://www.gobdp.com/blog/hard-shifting-transmission/

      We hope this helps you find a solution.

      -BDP

  12. Hi. I have a Mazda 5, 2.3 with 4 speed auto tranny. I started having some problems with thr tranny. When it is cold ; no shifting issues at all. It shifts nice and smooth all the gears. When it becomes hot (driving for 5 to 7 miles or so) , I get the problem between 2nd to 3rd gear. It shifts kind of late to the 3rd gear -and over revs for a second or so then shifts to the 3rd. No disengaging issues at all. But, sometimes, I run into no reverse (after parking and shutting the car only). I put into neutral then reverse it works and engages all the times. I changed the fluid couple of times but the problem persists. Could it be tranny temperature sensor or range sensor or internal clutch issue? Thanks in advance for your help and advice.

    1. Dave-

      We are sorry to hear of the issues you have been having with your Mazda. Your problem is difficult to diagnose since it only happens under certain conditions. It was a great idea to get your transmission fluid changed and to keep up with the regular maintenance of your vehicle. It does sound like you are having a transmission issue, but it may be hard to pinpoint it. We would recommend checking your transmission fluid level just to make sure the proper amount has been added and also change the filter if you have not already done so. For more information about why your transmission may be shifting hard, please see an article that we previously posted called “Hard Shifting Transmissions”, that can be seen here: https://www.gobdp.com/blog/hard-shifting-transmission/

      -BDP

  13. I have a 2005 Nissan Maxima, automatic/93K mi, that is shifting rough from 1st to 2nd, then from 2nd to 1st (all other gears are fine). This does not happen all the time. Seems worse when the engine is warmed up and running for a while. Had mechanic check out/flush transmission fluid/check solenoids. Rechecked fluid and still brown. He told me at some point I am going to have to get my trans fixed. Is this a product that will help prolong the fix or should I just spend the $3K and get it taken care of?

    1. Matthew-

      Thanks for your question, and I’m sorry your F-150 isn’t working like you would like it to. We recommend that you have the transmission fluid and filter changed and to keep up with the regular maintenance of your vehicle. We also recommend checking your transmission fluid level just to make sure it is at the proper amount. For more information about why your transmission may be shifting hard, check out our article on hard shifting transmissions: https://www.gobdp.com/blog/hard-shifting-transmission/.

      Beyond that, you may have to take your Ford to a transmission specialist to further diagnose the problem.

      Thanks again, and good luck getting your F-150 fixed!

      -BDP

  14. My 2001 dodge Durango has been shifting kind of jerk it do it like 3 or 4 times back to back when I’m driving but not always. My fluid is always low so I’m assuming there’s a leak if so it’s been there a while but it’s never acted like this. I’ve been putting in the +4 transmission fluid which is what auto zone recently told me I had to put but it seems to have made things worse.

    1. Monique-

      If your fluid levels are not where they are supposed to be your engine may act up. If you are having to add fluid then that would be an indication that you probably have a leak. We recommend using the BlueDevil Transmission Sealer; you will need to add 1 ounce of BlueDevil per 1 quart of capacity (you will not need the full bottle). Again, be sure to check your fluid level periodically to make sure it is not low or overfilled.

      Thank you,

      -BDP

    1. Jack,
      Thanks for your question and I’m sorry your Chevy isn’t working quite right. Being such a new vehicle, your best option is probably to take it to a deal and see if they will repair the problem under warranty. It may simply be that your new transmission needs some time to wear in, as this can take 1000, to 1500 miles for a new transmission. It may still be worth checking your transmission fluid level if your vehicle is equipped with a dip stick, otherwise a mechanic should be able to help you find the problem.

  15. HIn having problems with no reversei,I have a 1996 Chevy Suburban it makes a noise when in turning corner or start out it an stops then sometimes at night my lights r on it makes noise light inside flicker just for a second stop with noise

    1. LadyL,
      Thanks for your question and I’m sorry your Suburban isn’t working quite right. The year Suburban you have was known to have trouble with the transmissions not going into reverse if the transmission fluid is dirty. A transmission fluid flush and the filter changed may fix your problem with reverse. As far as the noises you hear when you’re turning a corner, try reading our article about front end noises here: https://www.gobdp.com/blog/steering-wheel-noise/
      Your lights flickering is a difficult problem to diagnose without watching it happen but it does sound like you have an electrical short somewhere causing your lights to work intermittently. That type of problem is best handled by a mechanic as it will take some time to trace down the source.

    1. Pato-

      The BlueDevil Transmission Sealer, as well as our other products, can be purchased directly through our website (www.gobdp.com) and shipped internationally. When you are checking out you will simply select “Nigeria” on the country drop down menu.

      Feel free to contact us at 888-863-0426 with any questions.

      -BDP

  16. i was stuck in traffic in my alero 2001 , the gear shift made a tuck sound , like a harsh shift .. also the vehicle while going to the highway at a speed around 60 – 70 mph the rpm start to hesitate i push the pedal further more then vehicle shift up and the hesitation goes away.
    what do you think about that?

    1. Abou,
      Thanks for your question about your Alero. Based on your description it sounds like there is a sensor that isn’t sending proper signals to your computer or transmission. On many Aleros, a bad idle air temperature sensor has caused similar issues you are describing with harsh shifts. The hesitation you are feeling on the highway may be due to the same sensor being bad, or it may be another problem. In your case it is probably best to take your car to a mechanic or transmission specialist so they can hunt down the electrical problem.

  17. I have a Mazda 3 and a couple of times when I try to move my gear from park to reverse it’s hard to do. Someone told me because sometimes when I park, my wheels are not straight. Not sure if that matters. I’ve checked fluid level and it’s good but I was also told that it was dark and needed to be changed. Help!!

    1. Stephanie,
      Thanks for your question about your Mazda. Great job checking the transmission fluid, and you are correct if it is dark red or brown you are probably due for a transmission fluid change. Your car sticking in park may be for a few reasons. First, if you are parked on a hill it will likely be difficult to shift it out of park. When you place your gear shift in park it puts a pin down into the flywheel teeth to keep your engine from moving. When you let your foot off the brake after putting it in park, your car will roll back until that pin contacts a gear tooth on your flywheel stopping your car from rolling any further. If you are on a hill the weight of your car can put a lot of pressure on that pin. That pressure can make it difficult to move the pin and consequently difficult to get your vehicle out of park. If you are parked on a hill, set your emergency brake first, then put your car into park and shut it off. When you get back in, start your car, put it in reverse, and then release the emergency brake. That way your emergency brake holds the weight of your car, not the pin.

      Also, there is an interlock that makes sure you cannot move your gear shift from park into reverse without having your foot on the brake. You may have to push the brake pedal further down to release that interlock, or it could be getting worn and need lubrication or replacement. If this is that case, it would be best to have a mechanic check it out.
      Thanks again for your questions!
      -BlueDevil Pro

      1. I have 1997 motorhome with Chevrolet 454 engine the transmission moves easily from park to reverse but very difficult to get from reverse to neutral also getting a leakage of fluid when doing this from top of transmission case.

        1. Gary-

          Thanks for your question about your motorhome! It is possible that you simply have a sticky shift linkage and need to lubricate that. If it is a cable that runs from the shift lever to the transmission, try disconnecting it from the lever and dripping a small amount of light machine oil into the cable hosing to lubricate it. If it is a lever linkage, identify the pivot points and try lubricating them similarly with oil or grease.

          It is possible that the leak you are seeing is part of the problem. The leaking fluid may be keeping the proper pressure from being built up to cause the shift in your transmission. Try using BlueDevil Transmission Sealer (available here: http://store.gobdp.com/transmission-sealer-00236/) to seal the leak and restore the pressure in your transmission. If your transmission has been leaking for a while, it is also possible that you simply have a low fluid level which could also cause the slow shift out of reverse.

          -BDP

  18. I drive a 2001 Pontiac Sunfire sedan. I noticed my transmission shifting hard from park to drive and also into reverse. I can also feel it shift on the road when accelerating. I checked my transmission fluid and it was full but I went ahead and changed it anyways because I know that it was far over due. The car still shifts bad and when I asked a mechanic he said that some cars just start to shift hard while getting older. Doesn’t sound right to me. Please help

    1. Sam,
      Thanks for your question about your Sunfire. I’m sorry it isn’t shifting the way you want it to. It is possible that you have a bad pressure control solenoid on your transmission. The shifting firmness in your transmission is regulated by the pressure of the transmission fluid inside and if the pressure is too high it can shift hard. It may be worth getting a second opinion on your transmission to determine if you do have a bad pressure control solenoid. It is possible that your mechanic is right, automatic transmissions do tend to get harder shifts as the clutches and bands wear down, but it would be worth have a transmission specialist check it out first.

  19. I have a slight leak coming from I thank the transfer case. On my 07 GMC when I check the fluids they seam fine. Maybe a hair low but not bad. But early n mournings it seams to shift alil late from 1st to 2 gear do you think our product cold maybe help my problem?

  20. i have a 94 mitsubishi galant automatic… in the morning on my way to work my car runs great no problem.
    i work about 5 miles away. on my way back no problem shifts good… but if i drive further like 20 miles or so my overdrive starts to hard shift only on the overdrive and at that point i feel my transmission kooler feels real hot, not normal………….. what could this be….

    1. Jaime,
      Thanks for your question and I’m sorry your Galant is acting funny. The automatic transmissions in the 90s gallants are known to start shifting hard as your car gets higher miles on it. Your best bet is to check the transmission fluid level and condition. If it appears dark red or brown at all consider getting a transmission fluid flush. If you discover your transmission fluid is low, add BlueDevil Transmission Sealer before you top it off to seal the leak so you don’t end up with a low fluid level again. You can purchase BlueDevil Transmission sealer from your local parts store or online here: http://bit.ly/16JIVMM

  21. The Transmission shfts a little hard and then sometimes smoothly, i haven’t checked the fluid level yet
    i thoght about BlueDevil Sealer, what do you think i should do get the car inspected by a transmission mechanic?

    1. Adrian,
      With an intermittent problem like you are describing it can be difficult to diagnose. You’re on the right track checking the fluid level. If you discover a low transmission fluid level definitely add BlueDevil Transmission sealer (available here: http://bit.ly/16JIVMM) to stop your leak and keep this from happening again. Also if your fluid appears dark red or brown it may also be time for a fluid change.

  22. There are times i’m unable to shift my gear from Park to either Reverse or any other gear. It takes a few tries to get it sometimes. Often occurs when i first start the engine. thanks!!

    1. Mike,
      Thanks for your question about your transmission. It is possible that you may need a transmission fluid change. In a manual transmission old fluid can make your synchros less effective so it can be difficult to shift your transmission into gear in an automatic transmission old transmission fluid can affect the pressures in your transmission making it slow to shift into gear especially when its cold. If you have an automatic transmission it is also possible that the linkage from your shift lever to the actual transmission is getting worn or sticking which would also make it difficult to shift into gear.

  23. Hi guys. I was wondering if anyone can help me out with my car issue. I drive a 1998 Volvo v70 and I ran the transmission level too low a couple of days ago. I refilled it but now my car is still driving weird. The rpm goes up and down from X1 and below when my car is stopped and it makes sounds like I’m accelerating. Then when I push the gas, and it won’t move for a second or two. does this sound like a lost transmission or is there hope. Thanks

    1. Miriam,

      Thanks for your question, we are sorry to hear that your Volvo isn’t working like you would like it to. It was a great idea to get your transmission fluid and filter changed and to keep up with the regular maintenance of your vehicle. It does sound like you are having a transmission issue, but it may be hard to pinpoint. We would recommend checking your transmission fluid level just to make sure the proper amount has been added.

      Beyond that, you may have to take your Volvo to a transmission specialist to further diagnose the problem.

      Thanks again, and good luck getting your vehicle fixed!

      -BDP

  24. I have 2008 GMC Seirra when ever its cold I have a hard time getting it to shift out of park. What could be the cause?

    1. Michael,

      We recommend that you get your transmission fluid and filter changed. We also recommend checking your transmission fluid level after it has been changed just to make sure your mechanic added the proper amount.

      Beyond that, you may have to take your truck to a transmission specialist to further diagnose the problem.

      Thanks again, and good luck getting the truck fixed!

      -BDP

  25. Hey. My transmission is doing really weird things. Ive looked all over the Internet and can’t find antone with the same problem. I have a 94 f150 but it has a 95 95 4 speed transmission. I was going down a steep hill one time and so I put my truck in second so slow me rather than riding my breaks. And for the first little wiles it would only shift hard going into 4th which I’d normal because I drive tons on the highway about 50 miles everyday. And then it just went away one night after work. Then get up the next mormornings and the problemishes ststarted to persist again. I changed my filter and all the fluid again after that and no more problems up until recently and now it shifts hard into every gear. I start my truck and wait for it to warm and honestly I may have a but to much fluid in there from my filter change but it also does something else weird. Whenever I put it in drive, it maless no weird noises. Just shits hard. But if I move it to second or first, and I’m costing in that gear, it makes a wining/squeeking noise. As soon as I give it gas, it goes away. I was thinking the noise came from the drive line because my truck is lifted but then shouldn’t it make the noise all the time, Regardless of weather it’s in drive or not? I’m so confused. Nothing ads up with my problem but I’m a perfectionist when it comes to my truck so please help?

    1. Baylan,

      Thanks for your question, and I’m sorry that your Ford truck isn’t working like you would like it to. Your problem is difficult to diagnose since it is only happening under certain conditions. It was a good idea to get your transmission fluid and filter changed and to keep up with the regular maintenance of your vehicle. It does sound like you are having a transmission issue, but it may be hard to track down. We would recommend checking your transmission fluid level just to make sure the proper amount has been added.

      Beyond that, you may have to take your truck to a transmission specialist to further diagnose the problem.

      Thanks again, and good luck getting your F-150 fixed!

      -BDP

  26. Hi I have a 97 Dodge RAM 1500, start up right away and is nice and good to go, now when I put it in R or D the truck jump and go off. Can you tell me in your experience if can be something with the transmission or what can be. Thanks for your help and have a good day.

    1. Angel,
      Thanks for your question about your Dodge Ram, and we’re sorry it isn’t working right now. It does sound like you either have a problem with your torque converter or transmission. Your torque converter is supposed to allow your engine to spin even if your truck is in gear. Since it is doing the same thing in both D and R it’s a good bet that this is where your problem lies. There isn’t much you can check in your torque converter without special tools, so your best bet is to have your Ram looked at by a transmission specialist.

  27. I have a 1991 chevy 350, first signs i got was when driving my truck down freeway my truck started to rattle but when i left my foot off gas pedal it stopped after awile my trck would stay in first and shift really high and into second then 3d n 4th be fine, some days it stop but now its doing it more, i did a brand new transmission oilchange and filter, but still did the same now it wont reverse and when i put gear in drive it takes awile to go, PLEASE HELP BEFORE I KEEP BUYN THINGS I DONT NEED THANKS

    1. Refael,
      Thanks for your question about your 91 Chevy. The problems you’re experiencing may be due to having a stuck or misadjusted throttle valve (or TV) cable in your transmission. This cable runs from the throttle plate on your engine down to your transmission and its position effects line pressure and shift points of your transmission. If that cable is out of adjustment or the valve is stuck it can cause your truck to over rev or not go into gear. Driving with this cable out of adjustment can cause premature wear on your transmission so you should look into having it adjusted as soon as possible.

      It is also possible that your transmission is in need of a rebuild and it is the actual clutches and bands being worn out that are causing it not to shift properly. If the last time you got a transmission fluid change the fluid was very dark or burnt this may be even more likely. A good transmission shop should be able to help you determine what the problem is.

  28. Hi, i have a BMW 725 TDS 1997 with 300.000km . When i putt it in D or R the car kicks 2 times, one smooth kick followed with a hard one. Also it jolts when it changes gears, worst when it’s changing gears without effort.
    I’ve noticed that if i accelerate, let it go to normal rpm and then engage the jolt is less.
    Sorry for my english, i’m Portuguese!
    I look forward for an answer because mechanics here can’t seem to find the problem.
    Thanks

    1. Tom,
      Thanks for your question about your BMW. The first thing to do would be to check your transmission fluid level and if you haven’t had it changed in a while, get a transmission fluid flush. If this doesn’t help the problem, it is possible that with so many kilometers on your car, your transmission is starting to wear out. Worn bands and clutches will cause the harsh shifting you are experiencing but that would probably be best diagnosed by a transmission specialist. It is also possible that you have a malfunctioning sensor somewhere in your motor so make sure you check the engine codes as well. A bad cam shaft position sensor or throttle position sensor may also be causing the problems you are experience.

  29. i have a 2002 Honda Civic Coupe LX and i got it used because it was all i could afford. when shifting into 2nd 3rd and 4th it jumps or shifts late. the way it was described above, it could be the transmission, but could the fluid that you sell (by some act of the almighty powers) fix this problem?

    1. Kyle,

      Thank you for your question and we are sorry to hear that your Civic isn’t performing the way you would like it to. We would first recommend that you get your transmission fluid and filter changed. Be sure to check your transmission fluid level to make sure it is at the proper level.

      Hopefully this helps. Feel free to contact us with any further questions.

      Thank You,

      BDP

  30. My Nissan Titan 2009 XE model just had a new fluid/gasket/filter change, but the over rev just to get from 1st to 2nd gear remains. It goes as high as 4500 revs until it shifts to 2nd, but at least it does it smoothly.
    Didn’t find any metal shavings during the draining/replacing as per my dealer mechanic stated. Should I get a rebuild from the mechanic now? He was hinting to that prior to me leaving to test/take home. I also want to mention that the over rev is around 20 mph until it shifts to 30 mph around that 4500 rpm mark I mentioned before.

    1. Scott,

      Thanks for your question, and I’m sorry your Nissan isn’t working like you would like it to. The problem may be difficult to diagnose since it only happens under certain conditions. It was a great idea to get your transmission fluid and filter changed and to keep up with the regular maintenance of your vehicle. It does sound like you are having a transmission issue, but it may be hard to pinpoint the exact cause. We would recommend checking your transmission fluid level just to make sure your mechanic added the proper amount.

      Anything beyond that and you may have to take your Nissan to a transmission specialist to further diagnose the problem or you may potentially be looking at a rebuild.

      All The Best,

      BDP

  31. the problem with my nissan sunny auto transmission 2008 model is that it jerks a bit on shifting from P to R & the N to D. can you please suggest me something to finish this problem.

    1. Ehsan-

      We would first recommend having the transmission fluid and filter changed to keep up with your routine maintenance. You will also want to check the fluid level to ensure it is not too high or too low.

      -BDP

  32. I have a 97 maxima and it won’t shift from 1st to 2nd gear while I’m driving. I can make it go all the way to the redline and it still won’t shift. Any suggestions?

    1. Todd-

      When you are experiencing a problem with your transmission the first thing you always want to check is the transmission fluid level. Low fluid levels can lead to several performance issues including not being able to shift from first to second gear. If it’s low, check for puddles around where the car is parked for extended periods of time to see if you have a leak; if it turns out you do have a leak then we recommend using the BlueDevil Transmission Sealer. If no leak is suspected, refill the transmission fluid and test it out.

      This solves a lot of transmission problems but if you still can’t shift then you may need to look at your throttle cables. A faulty throttle cable that has too much slack can prevent proper shifting, or shifting at all for that matter.

      -BDP

  33. I have a 2004 f150, 4×4, auto tranny, when I first start it up I will go right into reverse, but after you drive it a while it wont go into reverse, I have changed the fluid and filter several times, it doesn’t change, it has been doing this for a year, hasn’t changed, I have driven it for 4 hrs on a trip, let it set a couple hours and it goes right into reverse. any ideas. thanks.

    1. Joseph-

      Thanks for your question, and I’m sorry your F-150 isn’t working like you would like it to. Your problem is difficult to diagnose since it only happens under certain conditions. It was a great idea to get your transmission fluid and filter changed and to keep up with the regular maintenance of your vehicle. It does sound like you are having a transmission issue, but it may be hard to track down. We would recommend checking your transmission fluid level just to make sure your mechanic added the proper amount.

      Beyond that, you may have to take your Ford to a transmission specialist to further diagnose the problem.

      Thanks again, and good luck getting your truck fixed!

      -BDP

  34. Just had a remanufactured transmission with a 3 year unlimited mile warranty put in my 2004 Ford F150. After two months I’m now experiencing a hard shift into 2nd gear and a slight what feels like to be slippage on certain small inclines . The mechanic that installed it, plugged his diagnostic tool in and found that I have a problem with my charging system (AKA Alternator/Generator). He is telling me that the hard shift and minor slippage is most likely being caused by the charging system problem and not the transmission he installed. Does that sound right or is this a case of my mechanic not wanting to honor a defective transmission?

    1. Sir-

      The amount of labor that goes into replacing a transmission is quite extensive. This may be why he is wanting you to take all measures before having to warranty the transmission out.

      Changing an alternator is very inexpensive so you may be able to address that issue at a small price and he may be more willing to warranty the part if there are no codes showing.

      Thank you for your question!

      -BDP

  35. I drive a 2000 Nissan Maxima SE. Just until about a week ago my car worked perfectly fine, but now it’s starting to act up and jerk when changing gears. It’s been really cold here for the last couple weeks so I was wondering if it was just the cold or if my transmission is starting to go out. Just checked the fluid levels today and filled them up, so they’re all good.

  36. Hi there I have a chev blazer 2006 when temperature reach normal start having hard shifting from 1 to 2 I already change the transmission and still have same problem pls help to find out the problem thanks

    1. Mike,

      Thanks for your question about your 2006 Blazer. In your post, it sounds like you said you recently replaced the transmission. If that is the case, we would recommend taking it back to the shop that did the work to see if they will fix the problem under warranty.

      The best thing to do anytime you are having transmission problems is to check the transmission fluid level and condition using the dip stick. Often times, a low transmission fluid level will cause a hard shift, especially in the lower gears. If you find a low transmission fluid level, add the proper type of fluid and BlueDevil Transmission Sealer to stop the leak and keep your transmission fluid level normal.

      If you do not have a low transmission fluid level, it may be best to take your Chevy to a transmission specialist.

  37. I have a 1994 Dodge Dakota, v6(3.9) with an automatic 2wd transmission. One day on my way to work I lost all my gears. Now if I start it up it will shift right while its cold but once it warms up the gears disappear. There is a quiet whine and the engine bogs down a little while searching for the gears. I’m thinking the best thing to do is drop the pan and check for ware internally. What do you suggest? heard a lot about dodge and their Tranny problems

    1. Payden,

      Thanks for your question about your 94 Dakota. You’re definitely on the right track. If the transmission filter is clogged it will reduce line pressure as you drive causing your transmission to stop shifting. While your truck is parked the fluid and particles may settle back out causing your transmission to work again for a few miles.

      Also, I there may have been an update for the valve body on that transmission so if you call a local dealership and give them your VIN number they can let you know if there is any updates or recalls.

      Your problem also could be due to a low transmission level caused by a leak. After you pull the pan and change the filter and fluid, make sure you check the transmission fluid regularly. Check it with the truck running and in neutral. If you notice you are losing fluid add BlueDevil Transmission Sealer (available here: http://store.gobdp.com/transmission-sealer-00236/) to stop the leak and keep this problem from happening again.

  38. Hello i recently had my transmission rebuit about a week ago my 99 tahoe is running good it just jerks a little hard shifting from 1 st to 2nd gear but smoothes out in all other gears i have a year warrenty but should i be worried or am i over analyzing the shift of the gears.plz help

    1. Demitrius,

      Thanks for your question about your Tahoe. First, I would recommend you reading our article about new car transmissions. You don’t have a new car, but you do have a new transmission so this article should be applicable to your vehicle as well. You can check it out here: https://www.gobdp.com/blog/new-car-transmission-shifts-hard/.

      The other thing we would recommend doing is checking with the shop that rebuilt your transmission. The components they used to rebuild it, and how those new components were adjusted during installation can be designed to produce stiff shifts, so it could be perfectly normal. It would be worth checking with them to see if they’ve made those adjustments on purpose or need to go back in and change things.

      Thanks again for your question, and if you have any more please comment on the bottom of the above article.

  39. I have a 1996 Cutlass Ciera that has been running good, but when you go from park to drive, or drive to reverse it was shifting hard. Otherwise running fine. Last night it ran good, then this morning it wouldn’t go into reverse and making a really weird noise somewhere around the motor. Any ideas?

    1. Vincent,

      Thanks for your question about your 96 Cutlass Ciera. The first thing to do with any transmission problem is to check the fluid level and condition. There should be a dipstick with a red handle at the back of your engine bay about in the middle. Your transmission fluid level should be checked with the vehicle running and on level ground. The fluid should be up to the full line (either hot, or cold) and should be red in color, not brown or black and not smell burnt.

      The problem you are experience could be caused by a low fluid level. If you find the fluid level low, add BlueDevil Transmission Sealer to seal the leak that caused the low fluid level, then top off your transmission with the exact type of transmission fluid recommended in your owner’s manual. You can purchase BlueDevil Transmission Sealer at your local parts store or online here: http://store.gobdp.com/transmission-sealer-00236/.

      Your car not shifting into gear may also be caused by a clog somewhere in your transmission. Getting a transmission fluid flush may help this situation as new fluid can help remove the clog or debris and restore your transmission to proper operation. If that doesn’t help, you are probably looking at more costly maintenance and a possible transmission rebuild.

  40. I have a 04 Pontiac grand am. We just got the car all put back together after a head gasket replacement, now, the car shifts hard from park to reverse and also from park to drive… what’s recommended as my next step?

    1. Misty,

      Thanks for your question about your 2004 Grand Am. The first thing to do would be to check the transmission fluid condition and level. On your car, you should take it for a spin until the engine is up to operating temperature. Then, carefully remove the fill plug in the transmission pan. Transmission fluid should be just at the bottom of the hole, or even run out a bit. If the fluid seems dark, smells burnt or doesn’t run out of the hole it could be time for new transmission fluid.

      Hard shifts are usually indicative of pressure being too high in your transmission. It is possible that while you were repairing the head gaskets small particles or wear products settled in the valving or solenoids in your transmission causing irregular pressures. Changing the transmission fluid and filter can help remove these particles and return your transmission to normal operation.

      Also, as with any repair, you should always retrace your steps and make sure everything was reconnected properly. Since this transmission is computer controlled, if one sensor isn’t plugged in or is not reading properly it could cause the problems you are seeing. This should also produce a check engine light, or at least a stored code. Having the codes read could help you discover if that is the problem.

      Let us know if you have any more questions!
      -BlueDevil Pro

  41. hello i have a 1988 ford f250 plow truck automatic transmission
    i was plowing and i felt the shifter start to become harder to shift from drive to reverse
    as i would plow it got a bit worse
    still shifts but is feeling like the column linkage is tightening up between shifts
    any ideas?
    at the beginiing of storm it shifted fine and was smooth between shifts
    it goes into gear so far still good
    i had this happen on a dodge and it was the linkage but that case the shifter was loose
    this is tight feeling…thanks
    jay in ct,.

    1. Jay,

      Thanks for your question about your 88 Ford. It does sound like you just have a linkage problem here as well. On your truck there is a cable and linkage running from the shift lever down to the transmission to make the actual gear changes. It has been very cold in Connecticut recently so it is possible that the cold is causing the lubricants inside the shift linkage to gel and make it difficult to shift. It may also be possible that the shift lever on the transmission has become caked the road grime causing it to stick as you are moving it.

      When the weather permits we would recommend finding the point on the transmission where the linkage connects and make sure it is free of debris moves easily. If there isn’t a considerable amount of debris, you may need to replace the bushing in your shift linkage to regain smooth shifting.

      -BDP

  42. Good Evening,
    I have a 2008 Chevy Up-lander. I have been driving my car and have been noticing the car jerk a bit. It feels as if someone has hit me in the rear. Then lately my car stopped shifting into gear. It will not go into any gear but Reverse and Park. We checked the transmission fluid and it was very low. We added transmission fluid and attempted to shift the gears but was not successful. Do you have any recommendations.

    1. Florence-

      When a vehicle’s transmission fluid gets too low it can cause severe damage to your entire transmission system. The transmission fluid acts as a lubricant and when it is low the components of the transmission will start to grind against each other. As they grind together it can cause pieces of metal to mix in with the remaining fluid and will gradually cause the system to deteriorate.

      Based on your description it sounds like the only solution to the problem would be to have your transmission rebuilt.

      -BDP

  43. My automatic transmission 2007 Subaru Outback has a problem shifting up, the most common case is merging onto a highway from a stop. When I start moving the first shift happens fine, then the engine winds way up before the next shift which happens with a hard clunk and a kick in my seat, then the next shifts are fine. If you have the time to accelerate slowly the transmission shifts with no problem. Transmission fluid is a good color and at a good level hot and cold.

    1. Mike-

      Great job in checking the fluid level and color, those are the two best indications of the health of your transmission. The problem you are describing is very specific and given the fluid level and color are correct, it likely is a specific problem to one of the electronic parts of your transmission like a shift solenoid or sensor. Just like your engine computer your transmission computer can store fault codes to help you know what is wrong, but these usually can only be read by a Subaru dealer or transmission specialist. It would be worth stopping by a dealer or transmission shop to have them check the fault codes to give you an idea of where to start.

      Thank You!

      -BDP

  44. Hello there
    I have a 94 Dodge Ram 1500 5.2 with the 46rh transmission. I recently just broke the throttle valve cable but adjusted it. I also dropped my transmission pan and replaced the fluid, filter, and gasket. But it a 1-2 at around 25mph, and then does a 2-3 shift at 50mph. 3,4, and OD shifts are normal and not hard at all. I know this isn’t normal and It worked before. I don’t know what to do please help. Thank you

    1. Brant-

      Thanks for your question about your Dodge Ram. Usually if problems occurred just after maintenance then it is related to one of the maintenance items. First, it would definitely be worth re-checking your throttle valve cable adjustment. The tolerance on the adjustment is 1mm in either direction so you don’t have very much room to be off. Any difference can cause shifting problems because the transmission is getting the wrong input single from the throttle.

      There also is the rare occasion that high mileage transmissions will have problems after a fluid change. The new fluid will clean out some of the deposits left by the old fluid which can allow transmission fluid to leak past and move through components it didn’t used to with old fluid and deposits in place. This could also cause the problems you are seeing and would an indication that your transmission is in need of a rebuild.

      -BDP

  45. I drive a 2005 Hyundai Elantra. After it’s warmed up a bit, it starts to jerk when it’s going into 2nd gear. I’ve had it serviced at a shop about a month ago and took it back in yesterday since it has kept doing the same problem. They said it was a quart low on transmission fluid, though they had just changed it less than a month ago. Does it sound like the transmission sealer could do the trick?

    1. Danielle-

      Yes, it sounds like your Hyundai definitely has a transmission fluid leak. We recommend adding the proper amount of BlueDevil Transmission Sealer to your system. You should be adding 1 ounce of BlueDevil per every 1 quart of capacity. You should notice results after about 100 miles of driving.

      Feel free to contact our tech support team at 888-863-0426 with any questions.

      Thanks!

      -BDP

  46. I’m having problems with my 97 Acura CL 3.0 when I purchased the car the transmission was working fine no problems at all. The second day I start the car to drive and when I’m in 1st shifting to 2nd it over revs then it will jerk in to 2nd. It also does it in reverse too. Just had the transmission flush and restored with new fluid. It still over revs and jerk from 1st to 2nd but not as bad. What could be the problem?

    1. Terrance-

      Thanks for your question about your 97 Acura CL. It was a good idea to get the transmission fluid changed as new fluid at the proper level is the best way to keep your transmission working properly. If the problem started right after the maintenance you may bring your vehicle back to the shop that did the work and ask them to re-check their work and make sure they used the proper transmission fluid and the proper amount.

      The 97 Acura CL transmission has been known to have a few problems so you may consider calling an Acura dealership and seeing if there are any recalls or service items recommended for your vehicle. Some of these cars with the V6 can have the shift points reprogrammed in the transmission’s computer to help solve the problems you are experiencing. If you call a dealership and give them your VIN number they can tell you what can be done for your vehicle.

      Thank You!

      -BDP

  47. I have a 2000 Chevy Silverado 2500. After the transmission has warmed up, it actually slams into 2 and 3 gears while accelerating. It never does it when cold. Any ideas?

    1. Robb-

      Thanks for your question about your Silverado. The hard shifts you are experiencing could be due to a few problems, but it is always good to start with the basics of a fluid and filter change. Hard shifts are often caused by higher than usual line pressures in your transmission which could be caused by sticking valves in your valve body or dirty fluid. New fluid and a clean filter can sometimes help solve these problems. You also may have a faulty shift solenoid causing the shift to happen too hard. A transmission specialty shop may be the best way to help you figure out what is really going on with your transmission.

      -BDP

  48. transmission seems to work better when it’s cooler in temperature. but once it heats up it seems to have trouble going into 3rd gear it seems to rev up I. and it seems to be just 3rd gear. any answers?

    1. Mick-

      Thanks for your question about your transmission. The answer really depends on the kind of car you have and how old it is. But, since it is just one gear and only happens when it is warm, it sounds like you have a sticking valve in your valve body. A transmission fluid flush and filter change may help clean things out and help the 3rd gear shift valve from sticking. It may also be due to the 3rd gear shift solenoid going bad so that may be worth checking as well. Often 3rd gear is the first gear to start wearing out in a transmission so it is also possible that your transmission is simply starting to wear out and is in need of a rebuild.

      -BDP

  49. my 2001 ford expedition started not going into overdrive, and now its stuck in drive. even if I put it in park or neutral, its still in drive. it won’t go into reverse or anything. any ideas??

    1. Tarry-

      Thanks for your question about your Expedition. It sounds like the problem you are having with your transmission may just be due to a shift solenoid or valve being stuck. If your transmission shifts easily in all the other gears hopefully the problem is just in your valve body and you do not require a rebuild of the whole transmission. Unfortunately it will be difficult to diagnose the problem without the help of a transmission specialist.

      Thank You!

      -BDP

  50. I have a 2000 nissan maxima, the problem is when I step on the gas the change from first to second gear is horrible. It makes a loud noise and it makes the car jump a little. It happens ocasionally on 2nd to 3rd but mainly 1st to 2nd. Any idea what that might be?

    1. Juan-

      Thanks for your question about your 2000 Maxima. The first place to start with any transmission problem is checking the fluid level and condition. There is a dip stick on the driver’s side of the engine compartment labeled for your transmission. You can check the level while the engine is running and the car is in park. If the fluid isn’t bright red and at the “full” mark, a transmission fluid flush and new fluid may help the shifting problem you are having. If you find a low fluid level, add BlueDevil Transmission Sealer with your new transmission fluid to stop the leak and make sure you don’t end up with low fluid again. You can learn more about BlueDevil Transmission Sealer here: http://store.gobdp.com/transmission-sealer-00236/.

      If your transmission fluid is at the proper level and relatively clean, then the problem could be with your shift solenoid or the actual internal components of your transmission. In either of these cases it would be better to have a transmission specialist diagnose the problem.

      Thank You!

      -BDP

  51. i have an 2014 Dodge Avenger R/T. with only 7,500 miles brand new 1st owner
    When im driving at speeds of 35 mph or higher and i have to take my foot off the gas pedal for some reason my transmission jerks back, doesn’t do it all the time and some days it does it all day long. The Car switches gears great its only when is decelerating. Is there any reason why ?

    1. Williams-

      This is definitely abnormal for a vehicle that is still fairly new. I would take the car into your Dodge dealership to be looked at. Luckily, your Avenger should still be under warranty so there will be no cost to you.

      -BDP

  52. i have a 2006 Buick Rendezvous .sometimes when i pull off from a stop it shifts very hard. the rest of the gears are smooth. it also seems to have no power going up hill unless i give it a lil more gas. the fluid is a little darker than the normal color and fluid level is good. what could be the problem?

    1. Jason-

      Thanks for your question about your Buick Rendezvous. If your transmission fluid is a little dark, it may be worth checking when the last time you had your transmission serviced just to make sure it is up to date and well taken care of. Since you also mentioned losing power going up hills it sounds like it you might have a problem with your shift points and it may be a computer issue. This could be due to a poor single from a sensor or an error in your computer. You can start by having the codes pulled from your computer to see if it can help. Even if you don’t have a check engine light on your computer may still have an error code stored that can help determine what your problem is. In some cases, removing the cables from the battery can reset the computer and give it a fresh start that may solve your problem.

      Thank You!

      -BDP

  53. I replaced the 1-2 shift solenoid in my 88 Silverado because it was shifting hard, the spring was broke inside, I changed the fluid, there was almost no metal on the magnet so there was no internal wear, I also put a sealant in with the fluid. The problem is it’s still shifting hard and reving up to high,
    I heard it could be a linkage between my carburetor?

    1. Drew-

      Thanks for your question about your 88 Silverado. It sounds like you’ve done all the right things so far and it is good news that you didn’t find any metal in your fluid. There is a cable that runs from your throttle linkage down to the transmission called the kick down or throttle valve cable. This cable runs from your throttle down to the transmission and helps the transmission decide when to shift both on up and down shifts. There is a metal clip by your carburetor that you can squeeze to adjust the cable to change your shift points. Very small movements can make a large difference so adjust it slowly.

      -BDP

  54. I have 2003 Nissan Altima. The car doesn’t respond to drive in the morning. It will take me up to four to five time shifting the gear back and forth from park to drive or sometimes move the car with 1st gear. Once it respond, it works fine for the rest of the day until the following morning when the engine gets cold. What is your suggestion?

    1. Victor-

      The best place to start would be to change your transmission fluid and filter and then check to make sure the fluid level is at the correct mark. This will most likely alleviate any of the shifting issues you have experienced.

      Thank You!

      -BDP

  55. I have an 03′ mercury mountaineer and when I am coming to a light or stop sign my breaks work fine. But my suv just doesn’t want to stop, the Rpms stay between 1 and 2 and my speed around 10 mph and then I stop and it jerky and I feel it downshift. HeLP!

    1. Sabrina-

      Thank you for your question about your Mountaineer. The first thing to do is check for proper transmission fluid level, using the yellow dip stick, while the engine is running. If you have the proper fluid level and it has been changed at the factory recommended intervals, it is possible that the gear shift is getting worn. If the fluid has not been changed recently, you may want to try changing the fluid and filter. Dirty transmission fluid can often cause some “jumpiness” with your shifting.

      If your fluid levels and condition are acceptable we recommend having your Mountaineer looked at by a transmission specialist.

      Thank You,

      -BDP

  56. i have a 98 honda civic LX. When i turn the air on in my car it instantly looses power, the geers shift really hard, and it revs really hard. when i turn the air back to hot it works like normal. Why is this?

    1. Summer-

      Thanks for your question about your 98 Honda Civic. Your vehicle loses power when the air condition is switched on because a certain amount of your engine’s power is being used to turn the AC compressor. A belt runs from the crank shaft on your engine to the compressor so when the compressor turns on it is taking power usually transferred to the wheels of your car and transferring it to the AC compressor instead. Depending on your car and the air conditioning load, this can be anywhere from 3-6 horse power, or more, especially right when the air conditioning is switched on.

      While your engine is capable of producing a lot more power then that, during normal cruising you are only at part throttle so your engine is making much less than its peak power. The 3-6 horse power that the compressor is instantly demanding can feel like a significant power loss. This will make your engine feel less powerful and rev slower.

      In your case it sounds like the power loss with the air conditioning on is extreme. That could be an indication that your AC system isn’t functioning properly and needs to be recharged, have oil added or possibly even a new compressor.

      -BDP

  57. 2009 Chevrolet Tahoe 6l803 transmission approx 49000 miles
    When cold (first start up) shifting from Park to Drive shift is delayed and harsh
    After I drive a while and shift to Park then back into drive everything is smooth and not delayed
    Shifts are fine cold or warm but very first shift from Park to Drive is delayed and Harsh/Rough

    Mike

    1. Mike,

      Thanks for your question about your 09 Tahoe. The first thing to check is the transmission fluid level on your truck. With the engine running and it parked on level ground, use the drip stick on the passenger side rear of your engine. It should have a grey handle. If your fluid level is low, as mentioned in the article add BlueDevil Transmission Sealer (available here: http://store.gobdp.com/transmission-sealer-00236/) to seal the leak, then add the recommended type of transmission fluid to bring it the the proper level. A low fluid level could cause the problem you are having because the transmission fluid expands as it heats up which would bring the level within the acceptible range causing things to work normally

      If your transmission fluid is dark, brown, or smells burnt at all, it may be time for a transmission fluid change. Even if you are well before the recommended service interval, you may still need to change your transmission fluid based on how you use and drive your truck.

      If everything is fine with your fluid and you are still having trouble shifting out of park, there is likely a sensor or actuator sticking causing the problem. Unfortunately, problems like that are difficult to diagnose so you might need to take your Tahoe to a transmission specialist or the dealer.

  58. Bro, i have a mercedes benz E230 1996. The problems is, when the car shift fron gear 1 to gear2. It is hard to change but from gear 2 to gear 3 and others. There is no problem at all. What could it be? Thanks.

    1. Zeaf,

      Thanks for your question about your 1996 Mercedes. I’m sorry your transmission is starting to slip. Depending what your problem is, we may be able to help. You can start by checking your transmission fluid. It should be a bright red and not burnt smelling or black. If its not bright red you can try changing your transmission fluid and see if that will help the slipping.

      If you find a low transmission fluid level, we can help! Low transmission fluid can cause hard shifting or slipping gears. You should start by adding the recommended transmission fluid through the dipstick tube until your transmission level is at the “full” mark with the car running in park. Then, add the recommended amount of BlueDevil Transmission Sealer to your transmission; this will seal any leaks so you don’t end up with a low fluid level and slipping gears again.

      If your transmission fluid is fresh and at the proper level and you are still having shifting problems, you may have to have your vehicle looked at by a transmission specialist. For more information about why your transmission may be slipping you can read our article about it here: https://www.gobdp.com/blog/slipping-transmission/.

      Thank You!

      -BDP

  59. i drive a 95 blazer and im loosing fluid up front by the fan and the radiator and it shifted hard before and i put a little bit of atf in it and it shifted nicer but it seems the fluid is coming out of the two aluminium lines that run to the radiator one goes up and the other goes left if your looking at it from the front i need help asap so please help!!!!!!!!!!!

    1. Ashton,

      Thanks for your question about your 95 Blazer. Since you were low on ATF and noticed a difference when you added fluid I’m assuming you have a transmission fluid leak. Your Blazer runs transmission fluid to your radiator through two lines, an inlet and an outlet. Transmission fluid actually runs through the radiator in a separate cooling area from the engine coolant. This part of the radiator works as a transmission cooler. You have to identify where the leak is coming from so you know what you need to do to fix it. You may need a new radiator if the leak is from the metal fittings or the aluminum lines, or you may simply need to replace the hoses going from your transmission to the radiator.

  60. Hello, I have a 2000 plymouth voyager 3.3L flex fuel van with over 200 thousand miles on it. My problem is the transmission not shifting. The van was dying out while still in motion. Have already changed out the crank sensor and the input/output sensors. The van no longer dies out, but still having a problem with shifting gears. Their are no grinding noises so far. Can anybody help me with this problem?

    1. Nikki-

      Thanks for your question about your 2000 Plymouth Voyager! Great job getting it past 200,000 miles! When an automatic transmission won’t shift you won’t get grinding or odd noises like you do in a manual transmission, the gears will simply stop engaging. This is because an automatic transmission uses small clutches and bands to engage the gears rather than shift forks and collars like a manual transmission.

      The first place to start with any automatic transmission problem is checking your fluid level and condition. If your fluid is old or the level is low it is possible that is causing problems. A low fluid level is an indication that you have a leak in your transmission so make sure you add BlueDevil Transmission Sealer (available here: http://store.gobdp.com/transmission-sealer-00236/) before you top off the fluid. It is also possible that your transmission is simply worn out and in need of a rebuild since it has so many miles on it. A transmission repair shop should be able to help you make that diagnosis.

      -BDP

  61. I have a 2004 Chrysler 300m. Has 190000 miles. When driving it jerks ever so slightly into 2nd and jerks hard going into 3rd if I even give it any excess acceleration. it normally shifts about 2000 rpms. But when it goes into 3rd it won’t shift at 2000 it climbs to 2500 and jerks hard, if I let off the gas and let the rpms drop it dosent jerk as bad. The tranny oil isn’t dark and dosent smell burnt. My tranny is going out isn’t it?

    1. Heather-

      Thanks for your question about your 300m! It is possible that your transmission is on its way out and with 190,000 miles honestly you’ve gotten more miles out of it than many people do! However, usually jerking shifts are associated with a low transmission fluid level or a clog somewhere in the system rather than worn components. Since your transmission is computer controlled you could take your vehicle to a Chrysler dealership and have them scan the transmission computer for error codes or measure the line pressures.

      Unfortunately beyond that, it is difficult for a weekend mechanic to diagnose transmission problems so the best thing to do would be to find a transmission repair shop you trust and have them check things out.

      -BDP

  62. I have a 1995 Subaru Legacy and I’m getting frustrated. About a month ago my car started shifting weirdly. It began over-revving in first gear and then after I babied it a bit, it would finally shift into second and then the RPMs went down a bit. It felt a bit dangerous to drive so I only drove it when I absolutely needed to. After about a week I brought it to a mechanic and he wasted time for about 2 weeks and told me I needed a new transmission (of course), and I asked him to do a electrical diagnostics check and apparently the transmission shifting solenoid was scanning as bad. So, I replaced it myself since i need my car back ASAP. Briefly it helped a bit, but it continues to flare the RPMs when I accelerate and try not to shift on time, and shifts kinda hard too… I had my friend test the electric port again and the EGR valve is bad (error code: P0403) and I have no idea if that could contribute to it or if i’m now just either needing a new transmission or a new car. Any help would be appreciated!

    1. Thanks for your question about your 1995 Subaru. Great job in keeping it running up until this point! Over revving can be an indication that your transmission is in need of a rebuild and some components need to be replaced inside. Unfortunately you usually can’t tell if that is the case until you have the transmission removed and opened up and at that point you might as well rebuild it. The last thing you can do before you rebuild your transmission is to try and tighten the bands that control the shifts to see if you can get any more life out of them. They should be externally adjustable on your car.

      Ezra-

      The EGR valve code that you got most likely not related to the problems you are having. The EGR system recirculates exhaust gas on startup to help control emissions while your car is cold.

      With any transmission problems, make sure the transmission fluid is fresh and up to the appropriate level. If you recently changed the shift solenoid then I’m assuming you drained and refilled the transmission fluid. It might be worth checking to make sure you refilled it to the correct level.

      -BDP

  63. I have a 2010 Chevy Equinox. When the car shifts, it is sometimes very jerky, especially when just starting out. However, it will jerk some at higher speeds. I brought it to the dealer but there were no error codes to show anything wrong with the car. What should my next steps be?

    1. Julie-

      The best place to start would be to change your transmission fluid and filter and then check to make sure the fluid level is correct. Dirty or old transmission fluid will often cause a transmission to act up.

      Thank You!

      -BDP

  64. hi,
    i have a 1988 volvo 760 series which i recently changed from a v6 injector to a 4 cylinder carburator engine. the problem is, i have never noticed a change to gear 4 or beyond since the engine change. i just changed the transmission oil and check to level every now and then. is it possible that my car runs on gear 3 highest and why?

    1. Ekanem-

      The most likely cause of your transmission not shifting into 4th would be improper adjustment of the kick down cable. There should be a cable that runs from your throttle down to the transmission. When you step on the gas hard the cable tells the transmission to shift up into a higher gear so your engine can run at higher RPMs. If this cable is adjusted too tightly it may not be allowing the transmission to shift into 4th because it thinks you’re pressing the gas too hard.

      The other possibility is that the overdrive solenoid is not getting power which would also keep your car from shifting into high gear. Since you just did an engine swap it is possible that a connector get unplugged or broken during the swap. Make sure you check all the electrical connects going to your transmission to make sure the overdrive system is still hooked up properly.

      Thanks!

      -BDP

  65. hello,

    Ok so I’m still learning about cars so my explanations my be a little weird.I drive a 2002 Camry xle and it has 150,000 miles on it. So as I start my car its fine no problems but when I drive off the first two gear changes my car jerks when it hits each gear. If I press down on the gas too hard it just revs then catches(thats when it jerks the hardest). I try my best not to do it. When I’m driving and try to accelerate my car goes NOWHERE. instead of 0-60 in 3 seconds or whatever it takes like 10 seconds.

    1. Matt-

      The best place to start would be to change your transmission fluid and filter and then check to make sure the fluid level is correct. If you are still experiencing the hard shifting after changing the fluid and filter then you may want to have your Camry looked at by a transmission specialist.

      Thanks!

      -BDP

    1. Ty-

      The best place to start would be to change your transmission fluid and filter; be sure check to make sure the fluid level is correct. If you are still experiencing the rough shifting after changing the fluid and filter then you may want to have your vehicle looked at by a transmission specialist.

      Thanks!

      -BDP

  66. Hey I have a 08 impala and it leaks transmission fluid on the passenger side , I can’t find out we’re the leak is coming from.

    1. King-

      We recommend adding the proper amount of the BlueDevil Transmission Sealer; 1 ounce of BlueDevil per 1 quart of fluid capacity. Expect to start noticing results after about 100 miles of driving.

      Thank You!

      -BDP

  67. I have a 2002 Saturn SL2 automatic transmission. It’s been a great utility car, but yesterday, when I was driving it to work, when I accelerated, and the transmission shifted into another gear, the shift was hard in that it made a loud noise. I drove it no problem for 20 miles on the highway, but when I exited the highway it made similar load hard noises when the automatic transmission downshifted. I checked the transmission fluid and there are no leaks, the car has about 170,000 miles.

    1. Clifford,

      Thanks for your question about your Saturn SL2. The problem you are experiencing in your transmission is relatively common for these cars, especially with the number of miles you have on yours. First, you should change your fluid and filter every 30,000 miles so if that maintenance is due, try starting there. Second your line pressure solenoid may be malfunctioning causing unusually high pressures in your transmission which would make it shift hard so you can try replacing that solenoid to see if it solves your problem. Lastly, in many cases replacing the entire valve body can help stop the hard shifts. If you get used parts, a valve body replacement can be a relatively inexpensive job.

  68. I have an ’03 Chevy Silverado 2500 HD with an 4L80 transmission. The tranny has 130,000 miles on it and has had the fluid/filter changed at least twice. (it’s a used tranny installed with 80,000 miles on it.) When it’s cold, it shifts fine. After it gets hot (180 degrees) it shifts hard into all four gears. It’s also running hotter than normal. it used to top out at 150 degrees under normal driving. Also seems to be running 200 to 250 RPM faster at the same MPH. any idea what it could be?

    1. Phil-

      Thanks for your question about your Chevy Silverado. It sounds like your transmission has been well maintained so far. The best thing for any transmission is to keep fresh fluid in it so if it’s been more than 12 months you may consider having the fluid and filter changed again. The harsh shifts are probably a result of the high temperatures and the fluid losing some of its characteristics. Your transmission should have 2 lines running through your radiator or an auxiliary cooler to help keep temperatures down. You can check that part of your radiator or the auxiliary cooler for damage, bent fins or blockages that may be causing the temperature rise. In any case, adding an auxiliary transmission coolant can help extend the life of your transmission so it may be worth considering in your case.

      -BDP

  69. I have a 2000 Civic LX (4 speed auto) with 77xxx miles on it. It tends shift rough going from 1st into 2nd, and none of the other gears. Is this a fluid issue or a more severe issue?

    1. Jeremy-

      The best place to start would be to change your transmission fluid and filter and then check to make sure the fluid level is correct. This alone should correct the rough shifting.

      If you are still experiencing the rough shift after changing the fluid and filter then you may want to have your Pontiac looked at by a transmission specialist.

      Thanks!

      -BDP

  70. Changed the fluid and the filter but that did not seem to make it any better (or worse). I’m thinging that the computer is sensing the transmission slipping and is putting it into a high pressure mode. If I stop and turn the truck off for about 30 seconds, it seems to shift normally again. .Unfortunately it is not throwing any codes. Could this be the problem and if so, is there a work around.

    1. Phil-

      Unfortunately without any codes it is difficult for us to diagnose what is going on in your transmission. The fact that turning your car off and back on changes things makes use think it is a computer or electrical problem. You may have to take your vehicle to a dealership or transmission specialist to get more information.

      Thank You!

      -BDP

  71. I have a 02 vw Jetta and I know I have a transmission leak and low fluid. Just wondering if that have anything to do with hard shift and revving.

    1. Ja’Quil-

      If you are low on transmission fluid, that may have something to do with the hard shift. We would recommend adding transmission fluid and using the BlueDevil Transmission Sealer. You will use 1 oz of the product per quart of fluid in the system. Feel free to contact us at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  72. My 2005 Dodge Durango with the Hemi engine has a five-speed automatic transmission. It has about 140,000 miles on it, and the transmission was pulled out a month ago to have wiring harness repairs done (rodent damage).

    This morning it started lurching hard when the transmission shifts into fifth. Everything else works fine. No check engine light, no codes. It just lurches really hard when shifting into fifth (overdrive, I believe). After it shifts, it drives fine.

    As far as I can tell, the lurching only happens when the transmission is upshifting. I don’t *think* it did it while downshifting. It’s my wife’s daily driver, and I only drove it a few miles to try to duplicate the problem.

    Any ideas? I mean besides the fact that it’s a Dodge.

    1. Jim,

      Thanks for your question about your Dodge Durango. Based on the frequency of the problem and the fact that you just had work done for your wiring harness our best guess is that the problem is an electrical problem with your transmission. It sounds like a wire came loose or isn’t completely plugged into the sensor it went to and it’s causing erratic shifts. If you had the work done at a reputable shop we would recommend taking your Durango back to them since they were the last ones to look at it. Hopefully they can find the problem easily and will be able fix it for you.

  73. I have a 2002 Saturn SC2. When the transmission shifts gears about half the time the shift is not smooth and you can feel the car kick. When I purchased the car it had not been driven for a couple years. I had the transmission fluid changed but since I live in Costa Rica the transmission fluid filter was not available. Therefore I could not replace the filter. Any advise would be greatly appreciated

    1. Jeff,

      Thanks for your question about your Saturn SC2. With any transmission, the best thing you can do is keep clean fluid and a fresh filter in them. In your case replacing the filter may return the pressure in your transmission to normal and fix your problem. A lot of Saturn owners have had similar problems with harsh shifts, especially into reverse and in many cases it was simply an indication of a bad valve body. If you have access to the parts a new valve body may solve your problems as well.

  74. Hello,
    I use a 2004 Mazda 6S. Two days ago, after driving for about 30mins and parking, the Drive gear and semimatic gear failed to engage. Transmission fluid is clean and at a good level and the reverse works fine. Pls what can I do?

    1. Dipo,

      Thanks for your question about your Mazda 6. If the problem happened suddenly without any harsh shifting or other problems then you problem is most likely due to an electrical problem with your transmission, either a bad sensor or a broken signal wire. Unfortunately, you would need a pretty in-depth knowledge of your the transmission in your Mazda works to track down the problem but once you find the problem it hopefully won’t be a big expense. Your best bet may be to take your car to a Mazda dealership as they will know the most about your car.

  75. I have a 1996 Integra that’s been shifting a little rough lately. Going from 3rd to 4th presents the harder shifts and 4th gear rides rough the whole time. 50 mph and above when accelerating it acts like its somewhat slipping. Does this no matter the temperature. Going to perform a fluid and filter change as well as a new shift solenoid. Any thoughts?

    1. Jesse,

      Thanks for your question about your Integra. Unfortunately when it comes to automatic transmissions there isn’t much you can do yourself besides make sure the fluid and filter are clean. In many cases Integra drivers mentioned that a fluid change did help so hopefully this will help you as well.

  76. I have a 2006 Saturn ion that will every once in a while shift hard right in the middle of driving? And it stalled on me this morning when I put it in park, before even getting the key out?? No one can seem to tell me why it is doing this.

    1. Cheryl-

      The best place to start would be to change your transmission fluid and filter and then double check to make sure the fluid level is correct. If you are low on fluid, we recommend using the BlueDevil Transmission Sealer, found here: http://store.gobdp.com/transmission-sealer-0023 , to help seal your leak.
      If you are still experiencing the hard shift after changing the fluid and filter then you may want to have your Saturn looked at by a transmission specialist.
      Feel free to contact us with any questions.

      Thank you!

      -BDP

  77. Hi my transmission started shifting hard . I see no leaks where I park it . It a 2003 Buick century with 86000 miles .

    1. Poncho-

      The best place to start would be to change your transmission fluid and filter and then double check to make sure the fluid level is correct. Many times this will correct the problem and there will be no need for any repairs.

      If you are still experiencing the hard shift after changing the fluid and filter then you may want to have your Buick looked at by a transmission specialist.

      Thanks!

      -BDP

  78. I have a 2005 Toyota Corolla that shifts hard changing gears and the engine light comes on, I have had it serviced and repaired but it continues to do the same thing; could you help?

    1. Linda-

      Thanks for your question, and I’m sorry your Toyota isn’t working like you would like it to. It was a great idea to get your transmission fluid and filter changed and to keep up with the regular maintenance of your vehicle. It does sound like you are having a transmission issue, but it may be hard to track down. We would recommend checking your transmission fluid level just to make sure your mechanic added the proper amount.

      Beyond that, you may have to take your Corolla back to a transmission specialist to further diagnose the problem.

      Thanks you!

      -BDP

  79. My car fine when the car is in reverse coming out of the driveway, but the moment i put the car in drive and press the gas pedal, it take about ten hard pumps before it takes off. The problem ends up disappearing throughout the drive, but the cycle start over every time i cut off the engine *I just got my transmission flushed and this problem didn’t exist before.

    1. Daniel,

      Thanks for your question. Without knowing what kind of car, and more important the transmission you have, it is difficult to specifically identify the problem. Generally when you put your car in drive it is the line pressure that causes the actual clutches and bands to move and cause the shift. The fact that it takes a long time to get your car to go into gear indicates that either the pressure isn’t building properly or a solenoid is sticking. Since you just had things flushed it seems more likely that pressure isn’t building because a seal has deteriorated inside your transmission allowing fluid to slip past and the pressure to be too low to cause the shift.

      Thanks again for your question!
      -BD Auto Pro

  80. I have a ’95 ford bronco that is struggling to accelerate and is having hard shifts. Any advice on what could be the problem and what could save my transmission

    1. Jim-

      Thank you for your question about your Bronco. We first recommend that you change your transmission fluid and filter and then double check to make sure the fluid level is correct. If you are still experiencing the hard shift after changing the fluid and filter then you may want to have your Bronco looked at by a transmission specialist.

      Thanks!

      -BDP

    1. Chris-

      The best place to start would be to change your transmission fluid and filter and then double check to make sure the fluid level is correct. If you are still experiencing the hard shift after changing the fluid and filter then you may want to have your VW looked at by a transmission specialist.

      Feel free to contact us with any questions.

      Thanks!

      -BDP

  81. Okay, so I noticed my truck was idling rough, it’s a 2003 Ford Explorer by the way. But today I was driving and the truck lost power for a few seconds, then regained power. When I was checking out my gauges after that happened, I noticed my RPMS were high….going 65 and running about 2500-2800 and the o/d light started flashing. I got
    To my destination, did what I had to do, then started home, no shifting issues on the drive home, still high RPM though. But as I exited the freeway and came to a stop things got weird. I left the stoplight and I was hitting 4000-5000 RPMS between 1-2 and 2-3 I didn’t push to get to 4th or 5th, I just babied it to advanced auto parts to get the idle air control valve. When I left there it was worse. To the point I manually took it from 1st to 2nd to 3rd then drive, and it was fine, still high RPM though. So when I got home, I changed the idle air control, that definitely fixed the idle. When I drove it afterward, it does okay between 1-2 gear then still takes it to about 4000-4200 to shift from 2-3…..but the shifts are smooth. Any ideas?

    1. Amanda,

      Thanks for your question about your Ford Explorer. First, since you mentioned your truck was running rough, it may be time for a tune-up. Changing things like spark plugs, the oil, air filter and fuel filter might help smooth some things out. We would also recommend checking your transmission fluid level and condition just to be sure that isn’t the problem.

      It sounds most like you’ve got a bad sensor somewhere which is causing your shifts to hang up since they’re still smooth. A few things to check might be your throttle position sensor, intake air temp sensor or air flow sensor. If you have a check engine light on that may also help you track down which sensor is giving you problems.

      Thanks again for your question!
      -BD Auto Pro

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