How Can I Seal a Transmission Leak?

#driveyourlife

Checking Transmission FluidHaving a leak in your transmission can be a dangerous thing. It may seem like a few drips here and there won’t end up being a problem, but let’s do the math.  Assuming the puddle is big enough for you to notice, let’s say a puddle about the size of a dollar bill overnight, your transmission would lose about a quart of fluid every 10 days.  If your transmission holds 4 quarts of oil in the pan, then that’s a quarter of your fluid capacity gone in 10 days, and almost all of it gone in a month!

Having low transmission fluid can cause a lot of  expensive and frustrating problems.  First, the lack of fluid can cause higher than usually transmission temperatures.  The fluid in the transmission helps car heat away from friction points.  Less fluid means a higher temperature and a reduced capacity to cool the friction components allowing them to wear faster and potentially fail sooner.  An inadequate transmission fluid level also can mean poor lubrication if there is not enough fluid to reach the critical areas of the transmission also causing premature wear.  Lastly, a low transmission fluid level can cause dangerous drivability issues for your vehicle.  Transmission fluid is the high pressure operating fluid that cause gear smooth and accurate gear changes.  A low level can allow your vehicle to behave unpredictably and possibly even dangerously.

If you maintain your vehicle well and notice the transmission fluid leak, you may consider continuing to top of the transmission fluid level ensuring you don’t end up damaging your transmission due to a low fluid level.  Transmission fluid can range from 8$ a quart up to $15 a quart or more, so every 10 days you’re having to spend that much in replacement fluid, not to mention the time it takes to fill and check your fluid level every few days and continue to go to the auto parts store to purchase more fluid, funnels and clean up materials.

Transmission LeakThe most common leak points on automatic transmissions are the input and output shaft seals.  There is a shaft on the front of the transmission that slides either into the clutch plate or the torque converter that has splines on it.  This shaft transfers power from the engine to the gears in the transmission and will have an oil seal around it.  The output shaft similarly will have a seal that goes around the shaft, a slip yoke or the CV axles depending on the type of vehicle.  As these shafts or axles spin while your drive, over time they can start to wear down the seals around them.  Also, old fluid, low fluid or a lack of driving can cause these seals to dry out, harden or crack causing leaks.

 

Replacing these seals can often be a costly venture, and depending on the age of your vehicle and how long you intend to continue driving it, it may not be cost effective to replace them entirely.

You do however have another option.  Add BlueDevil Transmission Sealer next time you top off your automatic transmission fluid.  BlueDevil Transmission Sealer is specially formulated to restore the seals on the input and output shafts of your transmission to their original size and soft condition to permanently seal your transmission leak.  BlueDevil Transmission Sealer is guaranteed to seal your transmission leak!  Depending on the speed of your transmission leak BlueDevil Transmission Sealer can pay for itself in 2 weeks or less by saving you money on replacement transmission fluid.

BlueDevil Transmission Sealer

Pick up BlueDevil Transmission Sealer today at your favorite auto parts store like:

  • AutoZone
  • Advance Auto Parts
  • NAPA
  • O’Reilly Auto Parts
  • Bennett Auto Supply
  • CarQuest Auto Parts
  • Pep Boys
  • Prime Automotive Warehouse

Or, purchase BlueDevil Transmission Sealer directly from BlueDevil here.

Pictures provided by: www.rmauto.com and www.k100-forum.com

208 responses to "How Can I Seal a Transmission Leak?"

208 Comments

  1. Joe Kowal on February 18, 2015 at 7:41 pm

    Will this work if the cooler line is leaking a little. Its not spewing out just drips.

    • BlueDevil Pro on February 20, 2015 at 9:42 am

      Joe-

      The BlueDevil is not intended for a leak coming from the cooler line. We recommend having it replaced.

      -BDP

      • Devan on August 1, 2015 at 1:37 am

        Will it help seal a case seal on the bottom portion near my left cv axle

        • BlueDevil Pro on August 5, 2015 at 10:27 am

          Devan-

          Yes, the BlueDevil Transmission Sealer would work to seal the leak you have described. You will not need a whole lot of product based on the small capacity. You should add 1 ounce of BlueDevil per every 1 quart of capacity. Expect to notice results after about 100 miles of driving.

          Thank You!

          -BDP

          • Tee on September 10, 2015 at 11:15 pm

            What if your friend accidently adds the whole bottle? Is it going to mess the car up?



          • BlueDevil Pro on September 11, 2015 at 8:51 am

            Tee-

            It is very important to follow all of the directions properly to ensure best results. Using the full bottle will not harm your vehicle but you may want to siphon some of the fluid down and refill with the factory recommended transmission fluid.

            Thank you!

            -BDP



          • Golan on September 18, 2017 at 6:05 pm

            I added blue devil to my Hyundai Sonata gls 2014 and helped for 400 miles after that I keep having the problem. I put 16oz I went to transmission especially place they told me the transmission is missing pressure and the mechanic advised to buy expensive part. What I should do? Do you think I have to put more blue devil? This can help me to save my car.



          • BlueDevil Pro on September 19, 2017 at 10:58 am

            Golan-

            Thank you for asking about your Hyundai Sonata. Based on your description, we do recommend a second application of the BlueDevil Transmission Sealer. The fact that you noticed some kind of improvement is definitely a good sign and would warrant re-attempting the product. Please contact our technical support line at 888-863-0426 so that we may assist you in receiving a replacement bottle.

            Thank you!

            -BDP



      • donna on December 26, 2016 at 11:42 pm

        Will blue devil fix a front leak seal in the transmission

        • BlueDevil Pro on January 3, 2017 at 8:47 am

          Donna-

          Yes, the BlueDevil Transmission Sealer would seal the type of leak you have described. You should expect to see results after about 100-200 miles of driving.

          Thank you!

          -BDP

        • MUEED IRSHAD on August 23, 2017 at 1:34 pm

          my 2009 nissan murano front seal is leaking i put 10oz of blue devil transmission stop leak..
          what can i do
          i only put 50 miles on it

          • BlueDevil Pro on August 23, 2017 at 3:55 pm

            Mueed-

            It will usually take between 100 – 200 miles before you start to see any results with BlueDevil Transmission Sealer.

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

            Thank you!

            -BDP



      • Tyler on February 7, 2017 at 6:08 pm

        Had my transmission pan gasket replaced. Still a slow leak coming from the pan. Will blue devil seal this leak

      • gerald l clark on September 24, 2021 at 12:34 pm

        2009 malibu with tranny leak.
        Is this capable with dextron vi transmission fluid.

        • BlueDevil Pro on September 24, 2021 at 3:22 pm

          Gerald-

          Yes, the BlueDevil Transmission Sealer is safe and compatible to use on your Chevy Malibu with dextron vi transmission fluid. You will use one oz. of the product per quart of fluid. You should expect to start seeing results after 100-200 miles of driving.

          Thank you!

          -BDP

    • Tamara on March 19, 2017 at 6:05 pm

      I have two holes in my transmission will blue devil help stop the leak.

      • BlueDevil Pro on March 20, 2017 at 12:04 pm

        Tamara-

        The BlueDevil Transmission Sealer is intended to revitalize and recondition the rubber seals/gaskets in the system. How quickly are you losing fluid? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

        Thank you!

        -BDP

    • Roger Williams on April 2, 2017 at 1:13 am

      Is it ok to pour 16 ounces of blue devil to 14 quarts of oil transmission fluid

      • BlueDevil Pro on April 3, 2017 at 11:47 am

        Roger-

        The proper amount of BlueDevil Transmission Sealer to add to a 14 quart system would be 14 oz. You really only want to add the recommended amount of the product. However, the product does not harden or thicken in anyway, so it would not have any adverse affects on the system.

        Thank you!

        -BDP

        • Reginald L Mahone on July 1, 2019 at 8:55 am

          Will blue devil seal a inline crack in the trans. case?

          • BlueDevil Pro on July 1, 2019 at 1:35 pm

            Reginald-

            Yes, BlueDevil would be able to treat a leaking transfer case. You will use one oz. of the product per quart of fluid, and should expect to start seeing results after approximately 100-200 miles of driving.

            Thank you!

            -BDP



    • Phillip on February 4, 2018 at 4:47 pm

      I have a 2006 Nissan Altima I just noticed my transmission is leaking every time I turn on the car it drips when I turn off the car it spills out I was wondering if the Blue Devil transmission sealer will seal the gasket

      • BlueDevil Pro on February 5, 2018 at 9:28 am

        Phillip-

        Thank you for asking about your Nissan Altima. The BlueDevil Transmission Sealer (https://store.gobdp.com/transmission-sealer-00236/) is intended for leaks that are seeping or lightly dripping from the system. As long as you are not losing fluid too quickly, you would be a great candidate for the product. You should expect to see results after about 100-200 miles of driving.

        Thank you!

        -BDP

      • Darryl Dixon on October 23, 2020 at 7:41 pm

        What if you are already have transmission fluid in your transmission and you notice that the transmission is leaking can you just add one oz Blue Devil

        • BlueDevil Pro on October 26, 2020 at 8:11 am

          Darryl-

          You should be using one oz. of the BlueDevil Transmission Sealer per quart of fluid in the system, capacity. If the system is already relatively low, you may add the recommended amount of BlueDevil and then top if off with transmission fluid. Be careful not to overfill the system.

          Thank you!

          -BDP

    • John bar on May 26, 2020 at 8:43 pm

      My transmission pan is overtightened and the gasket is smooshing out the sides some. It looks like it’s made of cardboard, as others have also mentioned elsewhere. OEM 1984 mediumduty truck. The plate seems nearly impossible to remove. Ever heard of a transmission stopleak fixing a leaky cardboard paper gasket oozing out the sides due. To overtorque? How long can the seal last?

      • BlueDevil Pro on May 27, 2020 at 10:27 am

        John-

        Unfortunately, we do not manufacture a product intended to treat cardboard or paper. Our BlueDevil Transmission Sealer is only intended for rubber seals/gaskets. Having the the gasket replaced sounds like it would be your best bet.

        Thank you!

        -BDP

  2. Shane on March 17, 2015 at 8:44 pm

    Will this work in Manual Transmission (2007 Ralliart Colt) ? I have a very small leak on my input shaft seal (100ml every 6 months). Currently running Redline 75W90. Does it thicken the fluid at all ?

    • BlueDevil Pro on March 18, 2015 at 2:18 pm

      Shane-

      The BlueDevil Transmission Sealer does not harden or thicken in any way. You should add 1 ounce of BlueDevil per every 1 quart of capacity.

      Results should be noticed after about 100 miles of driving.

      Thank You!

      -BDP

  3. Robert Scott on May 31, 2015 at 11:54 am

    Out of interest. Does this have any effects on cracks in the transmission casing? As in the metal? Thanks

    • BlueDevil Pro on June 1, 2015 at 10:21 am

      Robert-

      Unfortunately, the BlueDevil Transmission Sealer would not have any effect on an actual crack in the system. The product is specifically intended to rejuvenate and slightly expand rubber seals/gaskets.

      Thank You!

      -BDP

      • Andrew on September 15, 2016 at 11:54 am

        Do i have to run my car for over a 100 miles the same day after putting in the blue devil transmission sealer

        • BlueDevil Pro on September 15, 2016 at 11:56 am

          Andrew-

          Typically, you would start to see results after about 100-200 miles of driving. It does not have to be a continuous drive. You are fine to drive in 5,10 mile intervals, here and there. It would just be around the 100 mile mark before you would start to notice improvement. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  4. Glenda on July 24, 2015 at 10:03 am

    Should Blue be put in the transmission before you top of fluids, or should it be done afterwards?

    • BlueDevil Pro on August 3, 2015 at 12:32 pm

      Glenda-

      Yes, you may add the recommended amount (1 ounce of BlueDevil Transmission Sealer per 1 quart of capacity) of BlueDevil first and then top the transmission fluid to the proper level. You can expect to notice results after about 100 miles of driving.

      Thank You!

      -BDP

      • Jim on November 24, 2016 at 9:11 pm

        1 ounce to pan capacity or total system capacity wondering how much to use for my 42re trans with front pump seal leak

        • BlueDevil Pro on November 28, 2016 at 12:20 pm

          Jim-

          You would use one oz. of the product per quart of fluid in the system. Total system capacity.

          Thank you!

          -BDP

  5. Cindy on September 15, 2015 at 8:46 pm

    Front seal leaks badly, already added 1 bottle, but didn’t drive until next day, still leaking. Can I add more ?

    • BlueDevil Pro on September 17, 2015 at 9:18 am

      Cindy-

      Once the product is added you will not start to notice results until the vehicle has been driven about 100 miles. Be sure you are using the correct amount, you should be adding 1 ounce of BlueDevil to every 1 quart of fluid capacity.

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

      Thanks!

      -BDP

  6. Sonny on October 17, 2015 at 11:38 pm

    I Have a trans leak caused by bushing wear in my 2004 cad deville.Tech says it needs third clutch housing replaced($1600)
    Friends told me about Blue Devil for head gaskets.Will your trans sealer correct my problem

    • BlueDevil Pro on October 24, 2015 at 10:21 am

      Sonny,

      Thanks for your question about your Cadillac Deville. If your leak is still just a dripping leak for a gasket or seal then BlueDevil Transmission Sealer will restore the seal and stop your leak. You need to make sure to replace the worn bushing to get everything back into alignment before you try to seal your leak.

      Thanks again for your question!
      -BD Auto Pro

  7. Dwayne on November 1, 2015 at 6:03 pm

    I have a 97 Ford Taurus I don’t see a Leck or anything but it takes a long time to catch gear I already put 4 bottles of transmission fluid in it

    • BlueDevil Pro on November 3, 2015 at 10:59 am

      Dwayne-

      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. Having the transmission fluid level too high or too low can cause the transmission to act up and not shift properly.

      If you are still experiencing the hard shifting after changing the fluid and filter and topping to to the proper level then you may want to have your Taurus looked at by a transmission specialist.

      Thanks!

      -BDP

      • ashley on February 24, 2016 at 12:41 am

        I have a inner seal leak will it work it’s leaking pretty bad

        • BlueDevil Pro on February 24, 2016 at 8:33 am

          Ashley-

          The BlueDevil Transmission Sealer is intended for leaks that are seeping or lightly dripping from the system. Based on your description, you may be losing fluid a little too quickly for the product. Typically you would start to see results after about 100-200 miles of driving. If you would be losing all of your fluid before you got to that point, you would not be able to keep the sealer in the system long enough to get the benefit of it.

          Thank you!

          -BDP

  8. ashley on November 17, 2015 at 8:58 pm

    Hello I have a 2002 Hyundai elentra. I have a transmission leak and was told that I needed to have my seal replaced. Sometimes I have a puddle of transmission fluid and other times there are just drops. It drives okay. Bt I have felt my car drive like it was dragging then it will jump real hard into gear then drive perfectly fine. I was wondering if I could add the blue devil sealer to fix the problem to my car ?

    • BlueDevil Pro on November 19, 2015 at 3:12 pm

      Ashley-

      Thank you for asking about your Hyundai Elantra. Based on your description, we would recommend using the BlueDevil Transmission Sealer. You will be using one oz of the product per quart of fluid in the system and should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  9. Jim Arman on December 1, 2015 at 8:43 am

    Will the Blue Devil work on the front seal of a Borg Warner Velvet Drive Marine transmission. I would like a quick reply because I have to get the boat back in service.

    • BlueDevil Pro on December 1, 2015 at 2:44 pm

      Jim-

      Yes, you would be able to use the BlueDevil Transmission Sealer for your boat. You will be using one oz of the product per quart of fluid in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

      • Jim Arman on December 2, 2015 at 1:35 pm

        Thank you!

        • Mik Vah on September 3, 2021 at 11:37 am

          Jim
          Did the Blue Devil Transmission Sealer work on your Velvet Drive in your boat?
          I have the same issue and would really like to know.
          Thanks, Mik

  10. Andrew easter on December 7, 2015 at 9:08 am

    I have an 87 Chevy blazer, it’s leaking transmission fluid out off the front of the transmission, I pour a quart in and almost immediately it’s leaked out. what do I do

    • BlueDevil Pro on December 7, 2015 at 3:38 pm

      Andrew-

      The leak you are experiencing is too extreme for what BlueDevil Transmission Sealer is made to fix. At this point we recommend taking it to a transmission specialist.

      Thanks!

      -BDP

  11. Angelo on December 31, 2015 at 7:42 pm

    Hi I have a torque converter seal leak and they want 1200 to put in the seal. Will this work?

    • BlueDevil Pro on January 4, 2016 at 1:19 pm

      Angelo-

      Yes, we recommend using BlueDevil Transmission Sealer to stop your leak. You should add 1 ounce of BlueDevil per every 1 quart of capacity; most likely you will not need the full bottle. Expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  12. James Muir on January 15, 2016 at 12:48 am

    I have a 1994 Ford Explorer. It is leaking about 1 quart of fluid every 2-1/2 days. Im not ready to have to go thru the extensive labor especially without a lift to the drop the transmission right now inorder to replace the front transmission seal. I wanted to know if your Blue Devil Transmission Sealer would do the job and hopefully save me the grief of having to drop the transmission at this time for a leaking seal. Once again it leaks about 1 quart of transmission fluid every 2 to 3 days, which is a pretty serious leak and costly. Im hope your product will be my savior.

    • BlueDevil Pro on January 15, 2016 at 11:32 am

      James-

      Yes, based on your description we do recommend adding the proper amount of BlueDevil Transmission Sealer to your Explorer. You should add 1 ounce of BlueDevil per every 1 quart of fluid capacity. Once the product is added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

    • Owe figgy on May 26, 2020 at 11:09 am

      Can I pour the seal leak in first and then add the transmission fulid or is it the other way around

      • BlueDevil Pro on May 26, 2020 at 11:39 am

        Owe-

        You are able to add the BlueDevil Transmission Sealer and then top it off with transmission fluid. You will use one oz. of the product per quart of fluid in the system, capacity. Be careful not to overfill the system.

        Thank you!

        -BDP

  13. James Muir on January 16, 2016 at 4:16 pm

    I posted on your blog just two days ago. I went ahead and purchased the Blue Devil Transmissin sealer that very same morning. I added the proper amount of the product as instructed and drove the car 250 miles sense then. Right away I seen that the puddle of tansmission fluid that was being left on my drive way was getting less and less. This morning I was parked in a new spot over night and now would’nt you know, I didnt find one bit of transmission fluid on the ground under the car.
    This is great news for me and I hope it will last for a long while. Im impressed considering I have already tried many different brands of transmission sealers that are on the shelves with no results to fix the problem. Just more wasted money was all. If I had only tried Blue Devil first I would have saved more money. I deffinitly will tell everyone I know that has these type of leaks to try Blue Devil first to fix there problems. I cant thank the people who came up with and made this product enough. Thank You So Very Much. Sincerly, James Muir.
    A Very Satisfied Consumer.

  14. Andrew Spriensma on January 20, 2016 at 6:27 pm

    Hello,

    I have a Golf Cart Differential that is leaking oil slightly at the Input shaft. This product seems like it would work, but the golf cart is actually filled with motor oil (per the manufacturer’s recommendation). Would this product also stop the motor oil from leaking through the seal?

    • BlueDevil Pro on January 21, 2016 at 12:29 pm

      Andrew-

      Yes, we would recommend adding BlueDevil Oil Stop Leak to help stop the oil loss you are experiencing. Use 1 ounce of BlueDevil per every 1 quart of capacity. Expect to start seeing results after about 1 – 2 hours of use.

      Thank you!

      -BDP

  15. Daniel on January 27, 2016 at 7:43 am

    I have a leak on a BMW X3 2004, GM Automatic transmission. It is very small mayne 1/2 quart a month or less, a few drops every night. It looks like it is coming from the mechatronic seal. Will this product work for bmw’s with GM transmissions?

    • BlueDevil Pro on January 28, 2016 at 12:18 pm

      Daniel-

      Yes, BlueDevil Transmission Sealer is compatible and safe to use in your BMW. Based on the capacity of your transmission we recommend adding 8 ounces of BlueDevil Transmission Sealer for proper treatment. Expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

      • Dominick housley on November 7, 2020 at 10:16 pm

        I have a 2010 Chrysler Sebring and my car leaks at the front with a medium drip and I have to put a half a quart in every 1 1/2 days! I had a few people tell me it was the O-ring that needed to be replaced! Would your seal stuff work?

        • BlueDevil Pro on November 9, 2020 at 9:56 am

          Dominick-

          Thank you for asking about your Chrysler Sebring. Based on your description, we would recommend using the BlueDevil Transmission Sealer. You will be using one oz. of the product per quart of fluid in the system, and should expect to start seeing results after 100-200 miles of driving.

          Thank you!

          -BDP

  16. charmmorro Strothers on February 4, 2016 at 8:52 pm

    I have a transmission fluid leak and a oil leak with this blue devil work?

    • BlueDevil Pro on February 5, 2016 at 9:36 am

      Charmmorro-

      You should add the proper amount of BlueDevil Transmission Sealer to address the transmission fluid leak; 1 ounce of BlueDevil will treat 1 quart of transmission fluid. For the oil leak, we recommend using BlueDevil Oil Stop Leak, you should add one 8 ounce bottle. Once the products are added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  17. Scott on February 7, 2016 at 7:21 pm

    Does the BlueDevil transmission stop leak product cause any gumming in an automatic transmission?

    • BlueDevil Pro on February 8, 2016 at 4:13 pm

      Scott-

      BlueDevil Transmission Sealer (http://store.gobdp.com/transmission-sealer-00236/) does not thicken or harden at any point. There is absolutely no risk at causing “gumming” or any other type of harm to the system.

      You should add 1 ounce of BlueDevil per every 1 quart of fluid capacity; you may not need the full bottle. You can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  18. Nelson on February 15, 2016 at 11:06 pm

    Hello I just purchase blue devil product I think I made a mistake by putting the transmission fluid first then the bluedevil.. Is it going to work anyways?? Or is there any difference about putting the bluedevil first the transmission fluid after ??

    • BlueDevil Pro on February 16, 2016 at 11:00 am

      Nelson-

      There is no real difference in adding transmission fluid first or adding the BlueDevil Transmission Sealer first, as long as you are using the proper amount of the product and you did not overfill the system. You should expect to see results after about 100-200 miles of driving. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    • BlueDevil Pro on February 16, 2016 at 1:22 pm

      Nelson-

      It is perfectly fine if the transmission fluid is added prior to BlueDevil Transmission Sealer being added.

      Thank you!

      -BDP

  19. Walter on February 23, 2016 at 6:13 pm

    Hi I have a 95 t bird front transmission Leaks fluid a lil puddle a day I bought the blue devil my ? Is the 4 quarts I’m putting in do I add 1 ounce per quart or how many quart that’s in transmission an torch converter

    • BlueDevil Pro on February 24, 2016 at 8:36 am

      Walter-

      Thank you for asking about your Ford Thunderbird. You would be using one oz of the product per quart of fluid in the system. If the transmission system holds 4 quarts of fluid, you would be using 4 oz of the product.

      Thank you!

      -BDP

      • Deidra on March 1, 2016 at 11:56 pm

        I have 2004 BMW 530i I I was only able to use less than half of bottle of the 16oz transmission sealed

        • BlueDevil Pro on March 2, 2016 at 8:56 am

          Deidra-

          Thank you for asking about your BMW 530i. You should be using one oz of the Transmission Sealer per quart of fluid in the system. It looks like your vehicle only holds a little less than 2 quarts of fluid so you should be adding 2 oz of the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  20. Mario Paz on March 30, 2016 at 11:28 am

    Good Day, I want to use blue devil trans sealer on a GM transmission with dexron VI (valvoline), I have a very small leak that looks like it is coming out of the front seals. My only concern is that I already added lubegard red to condition my transmission, will adding blue devil be a problem if the other additive is in there, the other additive is not a seal sweller.

    • BlueDevil Pro on March 30, 2016 at 11:57 am

      Mario-

      No, it would be safe to add BlueDevil Transmission Sealer at this point. You should add 1 ounce of BlueDevil Transmission Sealer per every 1 quart of fluid capacity. You can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

      Thank you!

      -BDP

  21. Mark on March 31, 2016 at 11:01 pm

    1990 Cadillac Deville 4.5, Leaking oil, DIAG:
    Leaking from bottom pan, side pan, & both axles.
    Shifts good, rebuilt 2 years ago. Tech says tranny is in great condition except the mentioned leaks. Is this a job for the Blue Diablo?

    • BlueDevil Pro on April 1, 2016 at 8:36 am

      Mark-

      Thank you for asking about your Cadillac Deville. Based on your description, we recommend using the BlueDevil Oil Stop Leak. The Oil Stop Leak is a universal application and would treat leaks coming from the oil pan gasket, valve cover seal, rear main seal, transmission, etc. As long as you are not losing fluid too quickly, you would be a good candidate for the product. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

      • Mark on April 1, 2016 at 11:18 pm

        Well, I meant the trans, anyway I put 8oz. In & drove 140 miles. The cars been sitting now for 24 hrs & I $h!+ you not there’s not a drop on the floor!
        I am genuinely shocked! For anyone who has a bad tranny leak, be advised, my case / pans are not cracked, the tranny was rebuilt @ 2 years ago, & operating very well. I think my gaskets started cracking after sitting in below freezing temp at @ 8000 ft above sea level. My question to bdp at this point, how does the tranny seal effect the oil & the mechanics within the transmission? How can you prove it?

        • BlueDevil Pro on April 4, 2016 at 9:20 am

          Mark-

          Thank you for the excellent feedback, we are glad the BlueDevil Transmission Sealer was able to stop the leak in your vehicle! The product is only affecting the rubbers in the system. It is revitalizing and reconditioning the rubber seals or gasket, and will swell them up or expand them back to their original state. The product would not have any affect on the oil or the mechanics within the transmission itself.

          Thank you!

          -BDP

  22. Nick on April 7, 2016 at 2:36 pm

    I have a leak in the transfer case of my 4×4. The transfer case uses 75w-90 gear oil. The leak appears to be coming from the gasket between the transfer case halves (the case is splittable when disassembled). I believe the gasket is paper, not rubber. The case is NOT leaking from the rubber input or output shaft seals. Will the transmission sealer work on the paper gasket between the transfer case halves?

    • BlueDevil Pro on April 7, 2016 at 4:05 pm

      Nick-

      Nick-

      BlueDevil Transmission Sealer is specifically designed to stop oil loss from rubber seals & gaskets. Unfortunately, we do not manufacture any products that are made to stop the type of leak you are experiencing.

      Thank you!

      -BDP

    • Clarence on July 18, 2019 at 11:05 am

      I have a 2010 Ford Edge, it’s leaking fluid from the front left side of the axle.Will Blue Devil help fix my leak.

      • BlueDevil Pro on July 18, 2019 at 11:41 am

        Clarence-

        Thank you for asking about your Ford Edge. As long as the leak isn’t more than a seep or lightly dripping, you would be a good candidate for the BlueDevil Transmission Sealer. You will use one oz. of the product per quart of fluid in the system, and should expect to start seeing result after approximately 100-200 miles of driving.

        Thank you!

        -BDP

  23. eric on April 16, 2016 at 9:26 pm

    I have a 2002 audi a4 Quattro the other day I was backing out and the car died an I stared it and drove about 5 miles and looked back smoke was barreling out the back from the fluid being lost looked under and transmission was pouring out fluid looked under and it was coming out from between the bellhousing and engian block so I’m thinking blew the input shaft seal you think this might help I reall don’t want to pull the trans

    • BD Auto Pro on May 12, 2016 at 5:17 pm

      Eric,

      Thanks for your question about your Audi A4. The real question for us is why your car started leaking so much fluid so quickly. If you’ve had a slow leak for a long time that has been getting steadily worse then you might try using BlueDevil Transmission Sealer to stop the leak. If the leak has suddenly gotten worse it may be an indication of a bigger problem like a worn bearing allowing the shaft to wobble or or something else misaligned so it may be wise to remove and inspect the transmission to ensure there aren’t any bigger problems.

      Thanks again for your question!
      -BD Auto Pro

      • Sheilah on May 21, 2016 at 10:34 pm

        I have a Jeep Grand Cherokee Laredo that is leaking from the transmission pan between the transmission and pan even after I have replace the pan and gasket, will the transmission stop leak help stop this leak

        • BlueDevil Pro on May 23, 2016 at 2:36 pm

          Sheilah-

          Yes, we recommend using the proper amount of BlueDevil Transmission Sealer. You should add 1 ounce of BlueDevil per every 1 quart of fluid capacity. Once it has been added you can expect to start seeing results after about 100 miles of driving.

          Thank you!

          -BDP

  24. Joe on May 5, 2016 at 7:36 pm

    I only have small spot of leak size coming from the automatic box will blue devile work

    • BlueDevil Pro on May 6, 2016 at 8:45 am

      Joe-

      Based on your description, we would recommend using the BlueDevil Transmission Sealer for your vehicle. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  25. Kenneth Lucas on July 4, 2016 at 9:14 am

    I have a leak in the front seal on my transmission 94 Buick Roadmaster will this product seal it leaks about a quart or two a day I have tried everything else and do y’all have a product for conditioning and shudder

    • BlueDevil Pro on July 11, 2016 at 10:31 am

      Kenneth-

      Thank you for asking about your Buick Roadmaster. From the sounds of it, you may be losing fluid a little too quickly in order for the product to be effective. Typically, you would start to see results after about 100-200 miles of driving. If you are losing fluid too quickly, you would be losing the product just as quickly, and wouldn’t really be able to keep it in the system long enough in order to get the benefit of using it. A hard part repair may be your best option.

      Thank you!

      -BDP

  26. Nautica on July 5, 2016 at 6:15 pm

    Will it work for bmw? 745I 2003

    Just has spots on both sides…

    • BlueDevil Pro on July 6, 2016 at 11:23 am

      Nautica-

      Yes, the BlueDevil Transmission Sealer is compatible with your BMW. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  27. Jesus banuelos on July 16, 2016 at 2:28 pm

    I have a 2004 Chevy trailblazer. I have a leak on the transmission how many ounces of the blue devil should I put in?

    • BlueDevil Pro on July 18, 2016 at 10:33 am

      Jesus-

      Based on the transmission fluid capacity of your 2004 Chevy Trailblazer, we recommend adding 11 ounces of BlueDevil Transmission Sealer for proper treatment. Expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  28. Josey Jackson on July 17, 2016 at 12:13 pm

    I recently got an Chevy HHR and I was told from the owner it had a worn transmission seal, and as far as she knew it wasn’t leaking yet but would begin too soon if it wasn’t replaced. Would this keep the leak from starting?

    • BlueDevil Pro on July 18, 2016 at 11:07 am

      Josey-

      Thank you for asking about your Chevy HHR. The BlueDevil Transmission Sealer will revitalize and recondition the rubbers in the system and expand them, or swell them up, to get them back to their original state. You will be using one ounce of the product per quart of fluid in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  29. Jesus banuelos on July 18, 2016 at 2:34 pm

    I have a 2004 Chevy trailblazer. I have a leak on the transmission how many ounces of the blue devil should I put in? Would the blue devil harm my transmission? If I put the whole 16 ounce bottle?

    • BlueDevil Pro on July 19, 2016 at 4:09 pm

      Jesus-

      The capacity of the Transmission on your Chevy Trailblazer is 11.2 quarts. We recommend adding 11 ounces of BlueDevil Transmission Sealer to properly treat your vehicle. Expect to start seeing results after about 100 miles of driving.

      Thanks!

      -BDP

  30. Debbie on August 1, 2016 at 3:27 pm

    I have a 2004 Dodge Stratus, 2.7 V6 with 260,000 miles on it. I appears my transmission pan is leaking, will this seal that long enough until I can get my car in the shop to have the seal?d

    • BlueDevil Pro on August 1, 2016 at 3:39 pm

      Debbie-

      Thank you for asking about your Dodge Stratus. As long as you are not losing transmission fluid too quickly, you would be a great candidate for the BlueDevil Transmission Sealer. Typically, you would start to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  31. chuck tidd on August 8, 2016 at 9:07 pm

    I got a question for you and Blue Devil…I have a 1994 gmc sonoma the transmission started leaking terribly on my way to work one night. I wasn’t sure what the problem was (still don’t). It is leaking quite a lot of fluid between front of pan and cover plate on trans. My question is: will Blue Devil seal this problem? p.s. it only leaks when engine is running

    • BlueDevil Pro on August 9, 2016 at 9:50 am

      Chuck-

      Thank you for asking about your GMC Sonoma. Based on your description, you may be losing fluid a little too quickly for the BlueDevil Transmission Sealer to be effective. Typically, you would start to see improvement after about 100-200 miles of driving. Unfortunately, it sounds like you may lose the product before it would get a chance to seal. A hard part repair may be your best option.

      Thank you!

      -BDP

      • chuck tidd on August 9, 2016 at 11:34 am

        do you think if i add more and more product as i add trans fluid it might repair it in 100-200 miles?
        1 ounce to 1 quart trans fluid?

        • BlueDevil Pro on August 9, 2016 at 2:00 pm

          Chuck-

          You really only want to add the recommended amount of the product. You will use 1 oz. of the product per quart of fluid in the system. Unfortunately, if you are losing fluid too quickly, you would lose the product just as quickly, and wouldn’t really be able to keep it in the system long enough in order to get the benefit of using the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  32. John Williams on August 31, 2016 at 9:32 pm

    IS YOUR PRODUCT COMPATIBLE WITH THE SO CALLED SEALED TRANSMISSIONS OF THE TOYOTA TRUCKS USING WTO TRANSMISSION FLUID? MY ’07 TUNDRA HAS A SMALL LEAK WHERE THE DRIVE SHAFT ENTERS THE TRANSMISSION CASE. THANKS

    • BlueDevil Pro on September 1, 2016 at 9:21 am

      John-

      Yes, the BlueDevil Transmission Sealer is compatible with your Toyota Tundra. You will be using one oz. of the product per quart of fluid in the system.

      Thank you!

      -BDP

  33. Edward Corlew jr on September 4, 2016 at 4:46 pm

    Will it seal a leak between my transmission and transfer case in an awd suv.

    • BlueDevil Pro on September 6, 2016 at 11:12 am

      Edward-

      Yes, the BlueDevil Transmission Sealer would be able to seal the leak you have described. You will be using one oz. of the product per quart of fluid in the system, and should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  34. kd donaldson on September 15, 2016 at 8:23 pm

    i have a 05 ford explorer awd with a major leakage between the transfer case and transimission if i start the car transmission fluid runs out fast if its not started it leaks will this product work for this blue devil transmission sealer work

    • BlueDevil Pro on September 16, 2016 at 8:53 am

      KD-

      Thank you for asking about your Ford Explorer. Based on your description, you may be losing fluid a little too quickly for the BlueDevil Transmission Sealer. Typically, you would start to see improvement after about 100-200 miles of driving with the product. Unfortunately, you may be losing the product too quickly in order to really get the benefit of using it. A hard part repair may be your best option.

      Thank you!

      -BDP

  35. Ashley on October 3, 2016 at 7:10 pm

    I have an 01 ford Taurus. I started noticing it a few days ago but don’t know how long it has been leaking for. Today as I was driving it, it started jumping hard trying to get into gear, I’m assuming due to low fluid levels. I noticed a puddle because I immediately stopped driving it and had it towed home. Would this help fix the leak?

    • BlueDevil Pro on October 4, 2016 at 9:41 am

      Ashley-

      Thank you for asking about your Ford Taurus. Unfortunately, it sounds like you may be losing fluid a little too quickly for the BlueDevil Transmission Sealer to be effective. Typically with the product, you would start to notice results after about 100-200 miles of driving. If you are losing fluid to the point where you would be losing the product before you got to 100-200 miles of driving, you wouldn’t really be able to keep the product in the system long enough in order to get the benefit of using it. A hard part repair may be your best option.

      Thank you!

      -BDP

  36. David Sterling on October 8, 2016 at 8:38 am

    My ’03 Infiniti g35 Sedan started revving high all of a sudden and sometimes not catching the gear. I have flushed the transmission fluid completely but as soon as my wife drove it to Walmart (which is only 1 mile from home) it started acting how it did before I flushed it and the Check Engine Light came on. The place said I had a small oil leak but I never see any spots in my driveway so it must be very small if there is one. Will Blue Devil work in my situation?

    • BlueDevil Pro on October 13, 2016 at 9:23 am

      David-

      Thank you for asking about your Infiniti g35. Based on your description, we recommend using the BlueDevil Oil Stop Leak, found here on our website: http://store.gobdp.com/oil-stop-leak-49499/. The BlueDevil Oil Stop Leak is more concentrated and is the universal application that will work for oil pan leaks, rear main leaks, valve cover gasket leaks, etc. Being that it doesn’t sound like you’re exactly sure where the leak is coming from, the Oil Stop Leak is what you would want to use.

      Thank you!

      -BDP

  37. Roachelle Sandidge on October 10, 2016 at 4:23 pm

    I’m wondering will blue devil seal the hole in my transmission?also will it hurt my transmission?it’s not a big hole and it ain’t to long happened my car is a 2001 saturn sedan sl2 please help

    • BlueDevil Pro on October 11, 2016 at 9:29 am

      Roachelle-

      Thank you for asking about your Saturn. The BlueDevil Transmission Sealer is intended for leaks that are seeping or lightly dripping from the system. As long as you are not losing fluid too quickly, you would be a great candidate for the product. The product does not harden or thicken in anyway, so it will not have any adverse affect on the system.

      Thank you!

      -BDP

  38. Jamie D. on November 11, 2016 at 9:59 am

    I have a 2002 gmc Jimmy sls 4×4, I have a leak coming from the transmission pan gasket. Will the product work for my problem, and how much should I use since I don’t know how much fluid in total it takes to fill my system? Also, when I put more transmission fluid in to refill the system, do I need to add more blue devil then as well?

    • BlueDevil Pro on November 15, 2016 at 12:04 pm

      Jamie-

      Thank you for asking about your GMC Jimmy. It appears your vehicle has about an 11 quart capacity for transmission fluid, so you would want to use about 11 oz. of the product. You should only need to add the product once. Be sure to leave enough room for the recommended amount of the product.

      Thank you!

      -BDP

  39. Mike kasjanov on November 23, 2016 at 7:47 pm

    Well
    I have an 04 sienna and the transmission started to leak from the seal at the torque converter software I went and replaced the seal thinking it will fix the problem but I assembled it and its still leaking so I thought maybe the seal isn’t tight enough so I got a new seal and just shortened the spring to make the seal a little tighter. Put that all together and again it’s leaking I’m just alreadyet running out of ideas what it can be. Also it only leaks when the car is in gear reverse or forward… doesn’t leak when in park… what can it be?

  40. Bobby on November 24, 2016 at 9:13 pm

    I have a 2006 Subaru Legacy 2.5i 4T. Is Blue Devil safe to use in CVT transmissions? Thanks

    • BlueDevil Pro on November 28, 2016 at 12:14 pm

      Bobby-

      Thank you for asking about your Subaru Legacy. Unfortunately, BlueDevil Transmission Sealer is not compatible for use in CVT transmissions.  We do not manufacture a product that will work on those types of transmissions.  CVT transmissions require a very specific type of transmission fluid that can not be contaminated with any other type of fluid.

      Thank you!

      -BDP

  41. Salvador Santolucito on December 30, 2016 at 8:16 pm

    I’ve got a World Class T5 transmission from a 1991 V8 Camaro. Is BlueDevil sealer suitable for this car?

    It is not leaking from the input or output shaft. It is leaking from the seam where two pieces of the case are bolted together with RTV. It leaks a couple drips every time I drive it. And it only leaks when driving it.

    Will it seal this area?

    • BlueDevil Pro on January 3, 2017 at 2:33 pm

      Salvador-

      Based on the location of your leak we do not recommend using BlueDevil Transmission Sealer. BlueDevil Transmission Sealer is specifically designed to stop fluid loss coming from any rubber seal or gasket but not from a seam.

      Thank you!

      -BDP

  42. Christopher Tucker on March 13, 2017 at 7:29 am

    CHRIS 99 caravan noticed transmission fluid leaking when van was in parked will this product help that

  43. Wilson Sanchez on April 3, 2017 at 2:13 am

    I have a 2WD 97 Chevy s10 pickup truck with 2 leaks in the transmission one of the leaks is from the front seal and the other one is coming from gasket on the pan the leaks really aren’t that bad when driving around town but they get extremely bad if I drive on the highway will Blue Devil Transmission Sealer work for the leaks my truck is having?
    Please let me know ASAP. I’d really appreciate it. The truck is the only thing I have to get around in and I really can’t afford to get a new car or the transmission repaired do to I’m on disability. Thanks in advance.

    • BlueDevil Pro on April 4, 2017 at 10:17 am

      Wilson-

      Thank you for asking about your Chevy S10. As long as you are not losing transmission fluid too quickly, you would be a great candidate for the BlueDevil Transmission Sealer (http://store.gobdp.com/transmission-sealer-00236/). You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  44. Edward on June 3, 2017 at 8:37 pm

    Have a 1998 Mitsubishi Eclipse with a manual transmission. Axle seals are leaking slowly. The fluid used is Synchromesh 5W-30 (2.1 Qt). Is BD Trans sealer compatible with synchromesh fluid? Would you recommend transmission sealer in my case?

    • BlueDevil Pro on June 5, 2017 at 10:31 am

      Edward-

      Thank you for asking about your Mitsubishi Eclipse. Yes, the BlueDevil Transmission Sealer is safe and compatible to use with Syncromesh 5W-30 fluid in your manual transmission. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  45. Doug on July 18, 2017 at 4:18 pm

    Will my transmission still leak after I put the bluedevil transmission sealer in it and drive it around ford ranger automatic transmission

    • BlueDevil Pro on July 19, 2017 at 8:50 am

      Doug-

      Thank you for asking about your Ford Ranger. The BlueDevil Transmission Sealer wouldn’t instantaneously seal. Typically, it would be around 100-200 miles before you would start to notice improvement, so you more than likely would be losing fluid until that point. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  46. Joe on July 27, 2017 at 1:06 am

    I have a Buick LeSabre 2003. I drove it about 300 miles last year. Last year mechanic notice transmission fluid leaking. One year later, transmission fluid not low enough to top off during oil change. Mechanic thought if might be a faulty seal. Since I drive so little, would it harm the car to use the product as suggested, it may takes 6-9 months to get to 200 miles? Will it work if you only put in an ounce or two?

    • BlueDevil Pro on July 27, 2017 at 9:29 am

      Joe-

      Thank you for asking about your Buick LeSabre. The BlueDevil Transmission Sealer would still work in the situation you have described, it would just be around the 200 mile mark before you would have the full benefit of the product. You will be using one oz. of the product per quart of fluid in the system.

      Thank you!

      -BDP

  47. Jason on August 4, 2017 at 12:23 pm

    I added recommended transmission sealer into my transmission and it almost stopped the leak .instead of quarter size leak each time car was driven i now have just a drop or two on the transmisson case.I drove about 320 miles since i added the sealer.can i add more and how much or should i wait a bit longer?

    • BlueDevil Pro on August 4, 2017 at 1:19 pm

      Jason-

      Yes, at this point, you would safely be able to add more of the BlueDevil Transmission Sealer. You will add one oz. of the product per quart of fluid in the system. Please contact our technical support line at 888-863-0426 so that we may assist you in receiving a replacement bottle.

      Thank you!

      -BDP

  48. CT on August 8, 2017 at 10:15 am

    My car started to drip transmission fluid after a transmission flush. Can this stop leak product completely seal the leak? Is it guaranteed? It’s a 2006 Toyota 5AT transmission. Around 160000 miles. Thanks in advanced

    • BlueDevil Pro on August 8, 2017 at 1:53 pm

      CT-

      We recommend adding the proper amount of BlueDevil Transmission Sealer. You should apply 1 ounce of BlueDevil per every 1 quart of fluid capacity. Expect to start seeing results after approximately 100 miles of driving.

      Thank you!

      -BDP

  49. Antoine Freeman on September 1, 2017 at 3:45 pm

    Could I use it for anykind tranmission?I have a 05 buick

  50. Christopher on September 5, 2017 at 7:22 am

    Hi I was wondering if the transmission seal would work on a hydrostatic system

    • BlueDevil Pro on September 5, 2017 at 11:05 am

      Christopher-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use on hydrostatic systems. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  51. Mario Gomez on September 12, 2017 at 9:39 am

    I have a 1999 mustang GT, it recommend mercon – v automatic transmission fluid . Could I use blue devil to stop a leak that since to come from the front seal of the transmission , that you. Mario Gomez

    • BlueDevil Pro on September 12, 2017 at 11:30 am

      Mario-

      Yes, we recommend adding the proper amount of BlueDevil Transmission Sealer to stop your fluid loss. You should apply 1 ounce of BlueDevil per every 1 quart of fluid capacity. Expect to start seeing results after approximately 100 miles of driving.

      Thank you!

      -BDP

  52. Mario Gomez on September 25, 2017 at 9:07 pm

    I add blue devil transmission sealer on a 1999mustang gt and it just staring leaking more, therefore I had to change the oil on the transmission and this help to stop it less from leaking

    • BlueDevil Pro on September 26, 2017 at 9:36 am

      Mario-

      Thank you for asking about your Ford Mustang GT. How much of the product was added? You should only be adding one oz. of the product per quart of fluid in the system. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  53. Justina on October 8, 2017 at 4:30 pm

    I have a very small tranny fluid leak between flywheel and transmission. Not enough to leave spots on the drive way but when you crawl under car you can see where it’s wet and it’s red! But my car calls for only splll transmission fluid will this harm my vehicle more?? Should I not mix this with my specific transmission fluid?

  54. Lee on December 14, 2017 at 11:32 pm

    Can you use the stop leak in the transfer case of a 4×4?

    • BlueDevil Pro on December 15, 2017 at 8:28 am

      Lee-

      Yes, the BlueDevil Transmission Sealer would be seal a transfer case leak. You will use one oz. of the product per quart of fluid in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  55. Onesmus on January 1, 2018 at 4:18 am

    The converter Seal for my Gear box(Nissan Lafesta) is leaking…my mechanic has tried to repair/replace but still not working…he recommended a new Gear box which is too expensive… can any of your products help?

    • BlueDevil Pro on January 2, 2018 at 10:37 am

      Onesmus-

      Thank you for asking about your Nissan Lafesta. Yes, the BlueDevil Transmission Sealer (https://store.gobdp.com/transmission-sealer-00236/) would be able to sealthe leaking converter seal for your gear box. You would be using one oz. of the product per quart of fluid in the system, and should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  56. Derek on January 19, 2018 at 1:28 am

    Hi, I have a 1995 F250 with the ZF5 MANUAL 5 speed transmission, last Saturday I did a simple drain and fill on the transmission, using the Ford recommend full synthetic Mercon V fluid.

    Prior to the task all was well and no leaking, (although the fluid that was in the transmission looked a bit thicker than what ford recommended), but after the change I started noticing a bit of an odor so I checked it out and I have a small leak forming at the output shaft seal!

    My question is: With the fluid that was in the truck when I purchased it used, coming out thicker that the recommended fluid, and this problem starting upon a change, is it possible that the old fluid was simply not making it to this seal and thus not showing a leak until the thinner fluid was added, or some odd counteraction between the different fluids? And if so I am not sure how long the seal may or may not have been dry, or if the previous owner may have added thicker oil th “mask” the issue, and was wondering if the seal has been dry too long, will your product work or should I just take it directly to a repair shop? It shifts perfect but just wanted to hopefully catch it early if possible.

    • BlueDevil Pro on January 19, 2018 at 9:19 am

      Derek-

      Thank you for asking about your Ford F-250. Based on your description, it seems likely that the old transmission fluid you removed was too thick to leak out of the seal and that the new fluid added was thin enough to find it’s way out of the leak formed in the output shaft seal. As long as you are not losing fluid too quickly, you would be a great candidate for the BlueDevil Transmission Sealer (https://store.gobdp.com/transmission-sealer-00236/). You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  57. Lee on May 1, 2018 at 5:02 pm

    I was curious about my Nissan Rogue 09, the transfer case seems to be slinging a little gear oil all around. I believe its the outer seal, but the transfer case gear oil is seperate from the transmission fluid. (Not sure what kind of transfer cases these other people have) But i was curious if I would need to put this directly into the transfer case or if it somehow reaches over from placing the fluid into the transmission fluid? And do you think it would help? It doesn’t seem to be much, just a minor amount that doesn’t drip, just slings around and causes a minor amount of smoke after a long drive.

    • BlueDevil Pro on May 2, 2018 at 8:30 am

      Lee-

      Thank you for asking about your Nissan Rogue. Based on your description, we recommend using the BlueDevil Transmission Sealer. You would add the product directly to your transfer case and you would be using one oz. of the product per quart of fluid in the transfer case. You should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  58. Leigh on May 13, 2018 at 7:18 pm

    my 2012 toyota prius c, the transmission is leaking, I have added some lucas transmission fix, I wonder if I can add bluedevil transmission sealer without flush?

    • BlueDevil Pro on May 14, 2018 at 9:21 am

      Leigh-

      Thank you for asking about your Toyota Prius. Yes, you may add the BlueDevil Transmission Sealer on top of the Lucas. You will use one oz. of the product per quart of fluid in the system. Be sure that the system is not overfilled.

      Thank you!

      -BDP

  59. James on July 6, 2018 at 3:40 am

    Can you used blue devil transmission sealer on a 1994 honda civic del sol with manual transmission that uses regular 10w30 oil? Or do i need to use oil stop leak in transmission?

    • BlueDevil Pro on July 6, 2018 at 8:59 am

      James-

      Yes, the BlueDevil Transmission Sealer would be safe and compatible to use on your Honda Civic Del Sol manual transmission using 10W30 oil. You will use one oz. of the product per quart of fluid capacity in the system. If you are needing to top the system off with fluid, be careful to ensure the system is not overfilled.

      Thank you!

      -BDP

  60. Joshua Warner on July 15, 2018 at 4:24 am

    I have a 93 f150 looses about a quart a day from front seal will this work?

    • BlueDevil Pro on July 16, 2018 at 8:24 am

      Joshua-

      Losing 1 quart over within a day is a fairly large leak. However, there is a chance that BlueDevil Transmission Sealer would be able to seal it. For best results we recommend driving 1 – 2 hours right after adding the proper amount of BlueDevil. This will ensure that the product works as quickly as possible before most of it leaks out.

      Thank you!

      -BDP

  61. Bruce Agte on July 23, 2018 at 4:52 pm

    Can I use this product on my 1999 Subaru Legacy Outback AWD?

    • BlueDevil Pro on July 24, 2018 at 8:52 am

      Bruce-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use on your Subaru Legacy Outback. You will use one oz. of the product per quart of fluid in the system. You should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  62. Jennifer on October 18, 2018 at 1:27 pm

    I have just been told that my 2004 Cadillac Deville has a transmission side pan leak. Will this product work to fix that?

    • BlueDevil Pro on October 18, 2018 at 1:54 pm

      Jennifer-

      Yes, the BlueDevil Transmission Sealer (https://store.gobdp.com/transmission-sealer-00236/) would be able to treat the transmission pan gasket leak on your Cadillac Deville. You will be using one oz. of the product per quart of fluid in the system, and should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  63. Joel on November 9, 2018 at 10:10 am

    I have a infinity q45t and it leaks I put a quart in and it will let out it all in a matter of mins will this product work I don’t drive it tho when I yes blue devil as soon as I put in drive off would be best

    • BlueDevil Pro on November 9, 2018 at 12:49 pm

      Joel-

      Thank you for asking about your Infiniti Q45. Based on your description, unfortunately, you may be losing fluid a little too quickly for the BlueDevil Transmission Sealer to be successful. The product is intended for leaks that are seeping or lightly dripping. It sounds as though you may lose the product before it would be able to seal. A hard part repair may be your best option.

      Thank you!

      -BDP

  64. Samuel Russell on January 5, 2019 at 8:39 am

    Can this be used on cvt trans. ?

    • BlueDevil Pro on January 7, 2019 at 9:20 am

      Samuel-

      Unfortunately, BlueDevil Transmission Sealer is not compatible to use in CVT transmissions. We do not manufacture a product that will work on that type of transmission. CVT transmissions require a very specific type of transmission fluid that can not be contaminated with any other type of fluid.

      Thank you!

      -BDP

  65. Dennis Johnson on January 28, 2019 at 10:00 am

    I have a 2008 Jeep Wrangler with a NSG 370 Manual Transmission using Pennzoil 3501 Synchromesh fluid. I have a slow drip coming from the front of the transmission. Would BlueDevil Transmission Sealer be compatible?

    • BlueDevil Pro on January 28, 2019 at 10:17 am

      Dennis-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use in your Jeep Wrangler. You will use one oz. of the product per quart of fluid in the system. You should expect to start seeing results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  66. Robert Lee norwood on May 4, 2019 at 1:42 am

    Yes I have a 2007 Nissan Maxima automatic transmission will blue devil seal the transmission seals Indy transmission please reply

    • BlueDevil Pro on May 6, 2019 at 8:49 am

      Robert-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use on your Nissan Maxima. You will be adding one oz. of the product per quart of fluid in the system, and should expect to start seeing improvement after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  67. Santiago on May 6, 2019 at 9:56 pm

    Hi. I have a Silverado. Main seal leak in tranny. How many ounces do you recommend? Thank you. Santiago

    • BlueDevil Pro on May 7, 2019 at 9:01 am

      Santiago-

      You would use one oz. of the BlueDevil Transmission Sealer per quart of fluid capacity in your Chevy Silverado. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

      • Ryan Kern on June 20, 2019 at 2:26 am

        Will this work for 04 trailblazer tranny? Lost all fluid at 75 mph

        • BlueDevil Pro on June 20, 2019 at 1:29 pm

          Ryan-

          Yes, The BlueDevil Transmission Sealer is safe and compatible to use on your Chevy Trailblazer. However, the product is intended for leaks that are seeping or lightly dripping. Based on your description, you may be losing fluid a little too quickly for the product to be effective.

          Thank you!

          -BDP

  68. Jimmy weeks on July 5, 2019 at 1:02 am

    Can I use this product in a 2010 nissan altima with the cvt trans

    • BlueDevil Pro on July 8, 2019 at 9:03 am

      Jimmy-

      Thank you for asking about your Nissan Altima. Unfortunately, BlueDevil Transmission Sealer is not compatible to use in CVT transmissions. We do not manufacture a product that will work on those types of transmission. CVT transmissions require a very specific type of transmission fluid that can not be contaminated with any other type of fluid.

      Thank you!

      -BDP

  69. Jesus t on August 2, 2019 at 4:48 am

    I have a leak on my transmission coming from my shift shaft seal, will this product stop my leak? Will it harm the transmission in any way?

    • BlueDevil Pro on August 2, 2019 at 9:37 am

      Jesus-

      As long as you are not losing transmission fluid too quickly, you would be a good candidate for the BlueDevil Transmission Sealer. The product does not harden or thicken in anyway, so it would not cause any adverse affects.

      Thank you!

      -BDP

  70. Tyler Ross Longfellow on December 2, 2019 at 12:30 am

    How do I know how much to add if I have a sealed transmission? (2014 Cruze with no dipstick)

    • BlueDevil Pro on December 2, 2019 at 10:05 am

      Tyler-

      Are you asking about knowing how much transmission fluid to add or how much of the BlueDevil Transmission Sealer to add? You would use one oz. of the product per quart of fluid in the system. The transmission capacity can be found in your owners manual. If the vehicle does not have a dipstick, the transmission fluid must be checked at the transmission. This requires lifting the car on four jack stands. It must be level to check the fluid.

      Thank you!

      -BDP

  71. Ryan on April 20, 2020 at 1:16 pm

    Hey I have a 2010 Mitsubishi lancer that is leaking from the input shaft seal. It generally drips about the size of a golf ball after Parking it. It’s a manual transmission. Will this product work?

    • BlueDevil Pro on April 21, 2020 at 8:51 am

      Ryan-

      Yes, the BlueDevil Transmission Sealer would be safe and compatible to use for the manual transmission on your Mitsubishi Lancer. You will use one oz. of the product per quart of fluid in the system. Expect to start seeing results after 100-200 miles of driving.

      Thank you!

      -BDP

  72. Rich Harkness on April 24, 2020 at 1:27 pm

    Several years ago I bought a 35 year old John Deere 317 garden tractor that had been unused for many years, fixed it up a bit and added a front end loader. Now Its total system capacity is about 7 qts of hydraulic fluid. When I first got it running, the transmission shaft seal leaked as did several quick disconnect hydraulic fittings. To fix those leaks I added your Tranmission Sealer sealer per the directions ( 1oz/qt) and it seemed to slow those leaks dramatically. But now three years later and with very little use over that time (maybe three times for a total of 2 hours), those seals and Orings are leaking again. It will take adding about 2 quarts of ATF to replace whats leaked out. I wondered if I should add 7 oz of sealer now as i replace those 2 lost quarts (assuming the sealer I added three years ago is no longer effective) or whether adding another 7 oz in addition to the 7 oz I added three years ago would damage something. Or alternately to add just 2 oz more to treat the 2 qts of new transmission fluid I am adding. Your tech line expert said neither was correct. He said I should not add any more Blue Devil. Whats already in the system should suffice. Did I understand this correctly?

    Also I asked how long I would need to run the tractor before the already treated fluid would rejuvenate the seals and O rings that must have deteriorated again during these last three years of little use. He said at least 3 hrs.

    It would be helpful if you web site clearly explained some of these things.

    • BlueDevil Pro on April 24, 2020 at 3:46 pm

      Rich-

      Thank you for asking about your John Deere 317. Sorry for any confusion you may have encountered when calling our technical support line. Based on your description, the confusion may lie in your application of the product.
      Typically with the product, you should expect to see results after 1-2 hours of operation. To confirm, you’ve used the tractor a total of 2 hours in that 3 year time span? Did you operate the tractor more when you first added the product, or was that 2 hours total starting from when you added the BlueDevil Transmission Sealer? If it has only been operated for 2 hours total since the product was added, that may explain the reason for the recommendation. Adding more of the product would not be recommended if the vehicle/equipment wasn’t operated or driven long enough. It seems we may have missed the detail that you added the product about 3 years ago, and for that we apologize. That would definitely be key in trying to trouble shoot the problem.
      You were correct to add one oz. of the product per quart of fluid in the system, however, more of the product would not be recommended to add every time you were having to add transmission fluid. With the amount of time that passed from when the product was first introduced, it’s difficult to judge the size of the leak. If you’ve operated the tractor for 2 hours, and were 2 quarts low on transmission fluid, it sounds like you are losing about a quart of fluid/hour. Keep in mind, in a lot of cases, the reason seals/gaskets develop leaks is because of non-use. Especially in older equipment, when those rubber seals/gaskets aren’t being lubricated on a more regular basis, they start to become brittle and start to deteriorate, thus allowing fluid to leak out. The BlueDevil Transmission Sealer works by revitalizing and reconditioning those rubbers, specifically the transmission shaft seal for your John Deere, to get them back to their original shape and original flexibility. The product is only working when you are operating the equipment.
      Understandably, you are not required to operate the vehicle/equipment any more than you normally would but, it sounds like you may have wanted to operate the tractor more than you did over the last 3 years. In terms of re-treating the tractor, you would add one oz. per quart of fluid capacity. Feel free to contact us with any other questions.

      Thank you!

      -BDP

  73. Tez johnson on April 24, 2020 at 6:57 pm

    When I put my car in reverse it leaked like hell I have a Cadillac deville 03

    • BlueDevil Pro on April 27, 2020 at 9:22 am

      Tez-

      Based on your description, you may want to have the vehicle looked at my a transmission specialist as soon as possible.

      Thank you!

      -BDP

  74. Wade Anthony Thomas on June 15, 2020 at 4:19 pm

    My drive shaft come out. I fix it and now it leaking transmission fluid. Will this help

    • BlueDevil Pro on June 16, 2020 at 4:10 pm

      Wade-

      What kind of vehicle is it? How quickly are you losing transmission fluid? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  75. david white on August 11, 2020 at 3:55 pm

    I hve a mk 1 vwGolf gti convertiblr manual .I have a slight leak in the final drive seals. Will blue devil help with this problem ,as I said before its only a very slight leak Thankyou for your anticipated help

    • BlueDevil Pro on August 14, 2020 at 8:53 am

      David-

      Yes, the BlueDevil Transmission Sealer would be able to seal the leak you’ve described your Volkswagen Golf. You will use one oz. of the product per quart of fluid in the system, and should expect to start seeing improvement after 100-200 miles of driving.

      Thank you!

      -BDP

  76. Michael Brown on August 18, 2020 at 8:31 am

    What if I’m unsure if it’s my transmission that is leaking. Is it bad to still pour the sealer in ?

    • BlueDevil Pro on August 19, 2020 at 9:18 am

      Michael-

      Try checking the transmission fluid level. It is very important that the transmission fluid is not under/overfilled If the fluid appears low, it would indicate you are losing transmission fluid and would be a candidate for the BlueDevil Transmission Sealer.

      Thank you!

      -BDP

  77. ben on September 5, 2021 at 5:08 pm

    i have a 1966 thunderbird which uses f type fluid’ I had my transmission rebuilt 18 years ago. I start it up but don,t drive very much. But each time i do I notice a pool of fluid under it. I have about 6000 miles since rebuilt. will BLUEDEVIL transmission sealer fit it.

    • BlueDevil Pro on September 8, 2021 at 8:50 am

      Ben-

      Thank you for asking about your Thunderbird. BlueDevil Transmission Sealer works by revitalizing and reconditioning the rubber seals/gaskets in the transmission, while you drive. It is intended for leaks that are seeping or lightly dripping. Typically, you should expect to start seeing results after 100-200 miles of driving. You don’t have to take it on a road trip or an extended drive, however, you do need to be actively driving the vehicle for the product to seal.

      Thank you!

      -BDP

  78. Tyler on September 9, 2021 at 6:26 pm

    Will this product work for a leaking rear seal in a marine diesel transmission (reverse gear)?Specifically, a Volvo Penta HS1A 1.96:1 that uses 15W40 oil.

    • BlueDevil Pro on September 10, 2021 at 8:04 am

      Tyler-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use for the application you’ve described. You will use one oz. of the product per quart of fluid in the system. You should expect to start seeing improvement after 1-2 hours of operation.

      Thank you!

      -BDP

      • joshua on September 15, 2021 at 10:16 am

        Will this product work for a leaking transmission shifter bushing?

        • BlueDevil Pro on September 15, 2021 at 1:41 pm

          Joshua-

          The BlueDevil Transmission Sealer would only have an effect on rubber gaskets. It would not have any influence on the shifter linkage bushing.

          Thank you!

          -BDP

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