How to Fix a Transmission Leak Without Breaking the Bank

#driveyourlife

Leaking TransmissionA transmission leak isn’t the worst malady for a vehicle to have, but it’s still best to avoid them when possible. Most engines can hold four to six quarts of oil. Transitions, meanwhile, only hold one-and-a-half to three quarts of fluid. So, even a small leak can make a difference extremely quickly quickly. Not to mention, a leak can cost you between 100 and 200 dollars if you take your car to a shop (If you have to replace your transmission you’re looking at a lot more). Luckily, you can avoid a trip to the mechanic completely by following our guide. Everything you need to know about how to fix a transmission leak is right here! Additionally, BlueDevil transmission sealer is designed to stop transmission leaks in their tracks and get your transition back in working order. Find out more about our stop-leak product below!

Stop Your Transmission Leak Fast! 

How to Fix a Transmission Leak

With a manual transmission, there are really only two things that can cause a transmission to fail prematurely other than normal wear and tear: poor driving habits and an improper level/type of transmission fluid. If you have issues with your automatic transmission, check out our blog on how to identify and fix a hard shifting automatic transmission

Where Is the Leak Coming From?

If you’ve noticed transmission fluid leaking from the front of the car or sitting under your parked car, you’ve most likely got a leak. If you’re thinking about fixing the leak by hand, the first thing you need to do is locate the leak. Here are the most common places you’ll find a leak in your transmission: 

  • Cooler Lines
  • Dipstick tube O-ring
  • Input seal
  • Output seal(s)

Cooler Lines

The most common transmission fluid leak location is from the transmission cooler lines.  Every automatic transmission pumps the fluid either through a cooler in the vehicle’s radiator, an auxiliary cooler, or both to help warm the fluid when you first start driving and to help cool the fluid once it has reached normal operating temperatures.  The lines to and from these coolers are simply rubber hoses that can leak at the connection and crimp points. It is usually easiest to find where these lines exit your transmission then follow them up to the front of your vehicle looking for leaks. If you find a leak the best thing to do is replace the line.

Dipstick Tube O-ring

The dipstick you use to measure the fluid level in your transmission fits into a tube or standpipe.  That tube has an o-ring where it enters the transmission and as that o-ring gets old and dried out it can allow fluid to sneak past it and leak out.  Dipstick tube o-rings often leak intermittently and more when your vehicle is parked on a hill or slope. Replacing this o-ring is often a very easy do-it-yourself job so you may consider tackling it if you find this as your leak location.

Input Shaft Seal

This is the least common leak point in any transmission because it is hidden behind inside the bellhousing where it is safe from dirt, dust and other things that destroy seals.  If your input shaft seal is leaking, then you will see transmission fluid dripping from the front of your bellhousing. IReplacing the seal will require removing your transmission which can be an expensive job.  If that doesn’t make sense for your or your vehicle, use BlueDevil Transmission Sealer to restore that seal and stop the leak.

Output Shaft Seal

Leaking output shaft seals is a very common leak point.  If you have a transmission fluid leak at the output shaft seal you will see evidence of fluid leaks where your CV axle exits your transmission or where the driveshaft exits the transmission on a rear wheel drive vehicle.  Replacing these seals does not require removing the transmission so check with your mechanic to see if that makes sense for you. If not, BlueDevil Transmission Sealer can seal this leak as well!

How to Quickly Fix Any Transmission Leak 

Transmission Leaks can be costly issues that leave your car in the shop for days. With BlueDevil Transmission Sealer, they don’t have to be. Our expertly crafted sealing solution is designed to restore your transmission and seal leaks fast! For a fraction of the price and time that a visit to your nearest service shop will cost you, our sealant will put kick your transmission back into shape. Learn more below! 

Blue Devil Transmission Sealer

BlueDevil Transmission Sealer

 

 

 

 

 

 

 

Pickup BlueDevil Transmission Sealer at any of our partnering local auto parts stores:

  • Advance Auto Parts
  • AutoZone
  • Bennett Auto Supply
  • CarQuest Auto parts
  • NAPA Auto Parts
  • O’Reilly Auto Parts
  • Pep Boys
  • Fast Track
  • Bumper to Bumper Auto Parts Specialists
  • S&E Quick Lube Distributer
  • DYK Automotive

You can also purchase BlueDevil Transmission sealer directly from BlueDevil here.

Pictures provided by: 4bangerjp.com and www.apsisusa.com

 

91 responses to "How to Fix a Transmission Leak Without Breaking the Bank"

91 Comments

  1. Chuck on March 18, 2015 at 2:34 pm

    2007 mustang manual transmission leak at drive shaft uses mercon v fluid will blue devil help me? Thanks

    • BlueDevil Pro on March 18, 2015 at 2:43 pm

      Chuck-

      Yes, you should add the proper amount of the BlueDevil Transmission Sealer to help stop your leak. One ounce of BlueDevil treats 1 quart of capacity. You should notice results after about 100 miles of driving.

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

      Thank You!

      -BDP

      • Jonathan mannin on March 12, 2016 at 12:38 am

        I just put a new seal in my 94 chev c1500 after about 20 miles it started leaking again. A friend says its the bushing n the end of tranny wore out and another seal or anything won’t fix it. With it being a new seal is this stuff possible to stop my leak I can’t afford a transmission right now and can’t find one at that just all honestly will this work fort truck?

        • BlueDevil Pro on March 28, 2016 at 2:28 pm

          Jonathan-

          Thank you for asking about your Chevy C1500. As long as you are not losing fluid too quickly, you would be a good candidate for the product. Keep in mind, you will start to see results after about 100-200 miles of driving.

          Thank you!

          -BDP

        • Greg on May 3, 2019 at 10:50 pm

          Would this work for the transmission shaft seals on a Harley Davidson manual transmission?

          • BlueDevil Pro on May 6, 2019 at 8:48 am

            Greg-

            Yes, the BlueDevil Transmission Sealer would treat the manual transmission on your Harley Davidson. 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



  2. Brian on March 30, 2015 at 4:33 pm

    Does it have any harmful effect to the transmission, like, should I flush the transmission after the leak is sealed and replace the fluid, so that the residual sealer is purged? I’ve heard of other brands gumming up in the gears if the oil with the sealer in it wasn’t flushed.

    • BlueDevil Pro on March 31, 2015 at 10:52 am

      Brian-

      No, the BlueDevil Transmission Sealer will not harm the transmission or any other components in any way. The BlueDevil will not thicken or harden at any point. The Transmission Sealer can be left in for the life of the transmission fluid.

      You should add 1 ounce of BlueDevil Transmission Sealer to every 1 quart of fluid capacity.

      Thank You!

      -BDP

      • john on September 30, 2016 at 7:27 pm

        does it mix safely with any transmission fluid? and if so what about syncromesh?

        • BlueDevil Pro on October 3, 2016 at 10:45 am

          John-

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

          Thank you!

          -BDP

  3. Matt on September 14, 2015 at 1:32 am

    How do I add Blue Devil to a 2004 Mazda 3 manual transmission?

    • Matt on September 14, 2015 at 1:58 am

      PS – Is it sold in Canada?

      • BlueDevil Pro on September 14, 2015 at 3:44 pm

        Eddie-

        We do not currently have any retailers in Canada that carry the BlueDevil Rear Main Sealer. However, the product can be purchased online through our website (http://store.gobdp.com/transmission-sealer-00236/) and shipped directly to your residence.

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

        Thank You!

        -BDP

    • BlueDevil Pro on September 14, 2015 at 3:42 pm

      Matt-

      Your Mazda holds 6.1 pints of transmission fluid. You should add 3 ounce of the BlueDevil Transmission Sealer to your transmission. Expect to start noticing results after about 100 miles of driving.

      Thank you!

      -BDP

  4. Miguel on September 20, 2015 at 5:03 pm

    Exactly how much should I use for a 93 Ford F150 manual transmission?

    • BlueDevil Pro on September 21, 2015 at 9:10 am

      Miguel-

      You will use one ounce of the BlueDevil Transmission Sealer per quart of transmission fluid in the system of your Ford F150. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  5. Tony Woodard on September 29, 2015 at 8:32 pm

    Recently rebuilt my 4 speed transmission in a 1987 C60 Chevrolet dump truck, transmission works great now, discovered a small problem, have a small leak that I cannot see where the transmission is into the bell housing. All of the seals are new, the leak is like a drop or so in a 24 hour period but aggravating, would blue devil be a possible solution to keep from pulling the transmission back out?

    • BlueDevil Pro on September 30, 2015 at 12:08 pm

      Tony-

      Based on your description, we would recommend using the BlueDevil Transmission Sealer. You will be using one ounce of the product per quart of fluid in the system.

      Thank you!

      -BDP

  6. Tony on October 6, 2015 at 12:05 am

    How much would you use for a 95 5.0 Cobra engine?

    • BlueDevil Pro on October 6, 2015 at 9:10 am

      Tony-

      Thank you for your question. You will be using one ounce of the BlueDevil Transmission Sealer per quart of fluid in the system. If you have the 4 Speed Automatic, the capacity is about 13 quarts, so would be using 13 ounces of the product.

      Thank you!

      -BDP

  7. Andre Johnson on October 6, 2015 at 2:44 pm

    2004 saturn ion redline 4 door coupe
    How much

    • BlueDevil Pro on October 6, 2015 at 4:18 pm

      Andre-

      You should add 1 ounce of the BlueDevil Transmission Sealer per every 1 quart of capacity. Based on the transmission capacity of your Saturn you should add 5 ounces of the BlueDevil Transmission Sealer. Once the product is added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  8. Frank on October 19, 2015 at 11:58 pm

    I have a 2002 Audi tt Quattro 225hp 6 Speed Transmission. I removed the tranny to replace the clutch and separated the front differential from the transmission and replaced the 3 seals connecting them with OEM products, however I’m noticing some seeping from those seals. What is the capacity of the transmission fluid (synthetic 75W 90) so I can purchase your product and add the correct amount. The fluid runs through the transmission and differential. Will it be safe for this type of setup?. Thank You.

    • BlueDevil Pro on October 24, 2015 at 10:54 am

      Frank,

      Thanks for your question about your Audi. First we would recommend checking the torque specs on the bolts you tightened around those gaskets to make sure everything is tightened properly. If you still have leaks after that, you can add BlueDevil Transmission Sealer along with the gear oil for your transmission and differential. BlueDevil Transmission Sealer will not significantly raise the fluid level in your transmission so you can add it safely to your transmission now.

      Thanks again for your question!
      -BD Auto Pro

      • Angelina Martin on March 31, 2017 at 11:25 am

        How do i add blue devil to my 2005 Mustang GT ?and how many quarts is my car?

        • BlueDevil Pro on March 31, 2017 at 12:12 pm

          Angelina-

          Thank you for asking about your Mustang GT. Do you have a 4.0 6-cylinder or 4.6 8-cylinder? Is it an automatic or manual transmission? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle and be able to make any appropriate recommendations.

          Thank you!

          -BDP

  9. Joe G on October 26, 2015 at 1:42 pm

    Can your product be used in motorcycle transmissions, specifically a 2003 bmw k1200lt?

    Thanks,
    Joe

    • BlueDevil Pro on October 26, 2015 at 2:20 pm

      Joe-

      Yes, the BlueDevil Transmission Sealer is safe to use in motorcycle transmissions. You will be using one oz of the product per quart of fluid in the system.

      Thank you!

      -BDP

  10. LMU on November 2, 2015 at 10:58 pm

    What is all the transmission fluid has already leaked out and the engine is seized up? Will it still help? The gear oil leaked out of the input shaft. They said they put more in but it just poured out.

    • BlueDevil Pro on November 4, 2015 at 9:09 am

      LMU-

      Based on your description, unfortunately, we would not recommend using the product in this situation. It seems like you are losing fluid a little too quickly, and would probably lose the product before it got a chance to seal.

      Thank you!

      -BDP

  11. Joey Powell on November 12, 2015 at 9:16 pm

    My 1994 Mazda B3000 pickup has a manual transmission. However, it uses automatic transmission fluid. The transmission has a capacity of three quarts, and it leaks at a rate of around one quart every 4-6 weeks. The vehicle only has about 105,000 miles on it, so there’s a good chance that it set idle for an extended period of time.

    I’m interested in trying your product, by I need to know…

    1. Will it work on automatic transmission fluid in a standard transmission?

    2. If so, would it be able to stop this rate of leakage?

    Thanks.

    • BlueDevil Pro on December 7, 2015 at 3:15 pm

      Joey-

      Yes, BlueDevil Transmission Sealer will work with Automatic Transmission Fluid in a standard transmission. Based on the capacity, you should use 3 ounces of BlueDevil to treat the Mazda. The leak you have is fairly large but not too large fro what BlueDevil is intended to fix. Once the product is added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  12. Eric on February 20, 2016 at 1:08 pm

    I have an old 2 stroke that was just rebuilt but has an oil leak. Will this stuff work?
    Thanks

    • BlueDevil Pro on February 22, 2016 at 3:41 pm

      Eric-

      Yes, if the leak is coming around any of the rubber seals or gaskets then BlueDevil will work. Be sure to use the proper amount – add 1 ounce of BlueDevil per every 1 quart of capacity; more is not better. Once added, you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  13. Deidra on March 1, 2016 at 11:52 pm

    I have a 2004 BMW 530i and I noticed it has a slow leak I purchased the blue devil transmission seal 16oz. I could only use less than half of the bottle. Do I have to use as recommended ?

    • BlueDevil Pro on March 2, 2016 at 9:01 am

      Deidra-

      Thank you for asking about your BMW 530i. Yes, it is very important to use the product as recommended. Doing so will ensure the best possible results and give yourself the best chance of sealing your leak(s). You should be using one oz of the Transmission Sealer per quart of fluid in the system.

      Thank you!

      -BDP

  14. Westly Smith on March 2, 2016 at 7:20 pm

    Thanks for the information about transmission leaks! My car has one and I need to get it fixed fast! From reading your article I’ve realized that I’m not talented enough to fix it. I’m just going to take it to the shop.

  15. MeShan Hernandez on April 3, 2016 at 8:00 pm

    My 2001 dodge stratus manual transmission is leaking. It looks like right where the engine and transmission meet. I thought it was the rear main seal but I smelled the fluid and it’s definitely gear fluid so would this work?

    • BlueDevil Pro on April 4, 2016 at 3:04 pm

      MeShan-

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

      Thank you!

      -BDP

      • MeShan Hernandez on April 30, 2016 at 10:56 am

        I have used your product and it has done the job! Thanks again, and it was reasonably priced.

  16. daniel on April 7, 2016 at 4:12 pm

    My 2008 Lexus IS 250 has a gearbox leak. What quantity of the Blue Devil sealer can I use?

    • BlueDevil Pro on April 8, 2016 at 8:44 am

      Daniel-

      You should add 1 ounce of BlueDevil Transmission Sealer to every 1 quart of capacity. Most likely you will only need 1 – 2 ounces of BlueDevil to treat your gearbox. Once added you can expect to start seeing results after about 100 miles of driving.

      Thank you!

      -BDP

  17. Bill on May 25, 2016 at 12:25 pm

    BMW Manual Transmissions have a way for oil to get out even when all the seals are good, it’s called a breather. If the breather clogs, the transmission sprays out the oil…

  18. chip Kigar on June 5, 2016 at 4:52 pm

    I have a Triumph spitfire with a j-type overdrove that is leaking. I understand that my transmission has bronze components, what can be corroded by lubricants or additive that have sulfur.

    Is your product save to use in my car?

    • BlueDevil Pro on June 6, 2016 at 2:55 pm

      Chip-

      Yes, BlueDevil Transmission Sealer is safe to use in your Triumph. The proper amount to use is 1 ounce of BlueDevil per every 1 quart of capacity; you will not need the full bottle. Once added you can expect to start seeing results after about 100 miles of driving.

      Feel free to contact us with any questions.

      Thank you!

      -BDP

  19. Bret on June 10, 2016 at 10:01 pm

    I’ve got a 2000 audi tt with a bad main transmission seal leak im nervous to drive it 100 miles for a period of time is there any other way to get the treatment to work

    • BlueDevil Pro on June 13, 2016 at 1:06 pm

      Bret-

      Once the product is added you can go on multiple short trips; it does not have to be driven 100 miles straight to gain the benefit from BlueDevil Transmission Sealer. Make sure the correct amount is added; add 1 ounce of BlueDevil per every 1 quart of capacity.

      Thank you!

      -BDP

      • Ryan on May 2, 2018 at 9:38 pm

        I also have a audi tt 8n. It’s a manual 5 speed with 75w90 gear oil. Dies this work with this? Please let me know asap. Thank you a lot

        • BlueDevil Pro on May 3, 2018 at 8:45 am

          Ryan-

          Yes, the BlueDevil Transmission Sealer is safe and compatible to use on your Audi TT 8n. You will use 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

  20. carlo on June 13, 2016 at 4:13 pm

    I have a 2005 ford focus manual transmission, how much should I use? During oil change I was told that my transmission is leaking.

    • BlueDevil Pro on June 14, 2016 at 9:44 am

      Carlo-

      Thank you for asking about your Ford Focus. You will use one ounce of the product per quart of transmission fluid in the system. Based on your capacity, you will be using about 7-8 ounces of the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  21. Blake Cole on August 21, 2016 at 11:25 pm

    I have a ford ranger that is a 5 speed and in the last 3 week’s it made a 2 1/2 foot wide spill of transmission fluid and I was seeing if the blue devil would be ok to use on it. I don’t seem like it is a fast leak. But I’m not a mechanic so I’m not shur what a fast leak would look like

    • BlueDevil Pro on August 22, 2016 at 10:01 am

      Blake-

      Thank you for asking about your Ford Ranger. Based on your description, we would recommend the BlueDevil Transmission Sealer. You will be using 1 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

  22. Minh on September 18, 2016 at 10:28 pm

    I have a subaru impreza 2006 with manual transmission! I founded slow leak at passenger axle seal ! Will Blue devil product working on it ?

    • BlueDevil Pro on September 19, 2016 at 10:12 am

      Minh-

      Thank you for asking about your Subaru Impreza. As long as you are not losing transmission fluid too quickly, you would be a great candidate for the BlueDevil Transmission Sealer. It works on both automatic and manual transmissions. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  23. Miranda on October 26, 2016 at 1:07 pm

    i had my car looked at and the transmission bell housing seal is the problem will blue devil work for this

  24. Saiid on January 19, 2017 at 2:57 pm

    Hey I’m driving vw polo 6speed gear box it’s slightly leaking oil can I use u product to stop the leack.and how many ltr must I use to stop small leack

    • BlueDevil Pro on January 19, 2017 at 4:08 pm

      Saiid-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use in your Volkswagen Polo. You will be using one oz. of the product per quart of fluid in the system.

      Thank you!

      -BDP

      • Saiid on January 20, 2017 at 8:48 am

        Where can I buy u product in South Africa

        • BlueDevil Pro on January 20, 2017 at 8:57 am

          Saiid-

          Unfortunately, we do not have any distributors in South Africa, however, you may purchase the product directly on our website, gobdp.com. We do ship to South Africa.

          Thank you!

          -BDP

  25. David on February 23, 2017 at 6:53 am

    Hi, I have a Renault Clio Sport, The gearbox is leaking at the flanges where the two alloy casings are bolted together.

    They do not use a gasket for sealing, instead they are assembled with Loctite 518 anerobic sealant.

    Will your product work in this situation.

    Thank you

    • BlueDevil Pro on February 23, 2017 at 9:19 am

      David-

      Thank you for asking about your Renault Clio Sport. The BlueDevil Transmission Sealer (http://store.gobdp.com/transmission-sealer-00236/) is only intended for the rubber seals/gaskets in the system. Unfortunately, the product would not be able to seal the type of leak you have described. A hard part repair may be your best option.

      Thank you!

      -BDP

  26. Ian on March 17, 2017 at 12:55 pm

    I have a 1973 Etype Jaguar with a leaking Manual Transmission. Would blue Devil Work for me?

    • BlueDevil Pro on March 17, 2017 at 2:42 pm

      Ian-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use on your Jaguar E type. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  27. Jaelynn on June 4, 2017 at 4:39 pm

    Question: 94 f150 new clutch, peddle became soft a month in. Added brake fluid to top it off did this once a week then became an everyday occurrance, then I couldn’t shift at alk. Thought it needed to be bled but then noticed when you push the peddle to the floor I saw the fluid poor out the center of the bell housing. The seal is leaking correct? Would your product help at least get it home? It’s stuck in a parking lot about 5 mikes away. To be honest, this would be the cheapest fix for me. Not made of money so cheap is the only way for me. Thank you for reading!

    • BlueDevil Pro on June 5, 2017 at 11:14 am

      Jaelynn-

      Thank you for asking about your Ford F-150. Unfortunately, it sounds like you are losing fluid a little too quickly for the BlueDevil Transmission Sealer to be affective. Typically with the product, you would start to see results after about 100-200 miles of driving. If you are losing fluid to the extent that you would lose your fluid capacity before 100-200 miles, then the leak you have may be a little too extreme. A hard part repair may be your best option.

      Thank you!

      -BDP

  28. Tom on June 21, 2017 at 11:05 pm

    Have a 1958 panhead with a problem of leaking. Use 50W in tranny same as engine. will this work in it? Tom

    • BlueDevil Pro on June 22, 2017 at 10:21 am

      Tom-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use with 50W oil. You will be using one oz. of the product per quart of oil in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  29. Geoffrey Smith on September 24, 2017 at 7:12 pm

    I have a 67 ElCamino with M21 close ratio 4 speed transmission it is in perfect working order but sat stored for many years. I now have small leakage and I am using the recommended gear oil SAE 85W90 APL/GL-4 can I use Blue Devil transmission sealer.
    GS

    • BlueDevil Pro on September 25, 2017 at 10:03 am

      Geoffrey-

      Yes, the BlueDevil Transmission Sealer (http://store.gobdp.com/transmission-sealer-00236/) is safe and compatible to use on your Chevy El Camino. You will be using one oz. of the product per quart of oil in the system. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  30. EnZ on June 19, 2018 at 12:37 am

    Thanks for the product. Am driving an Isuzu Dmax in Zimbabwe and the gearbox has a leakage. Where do l get the product in Zimbabwe. Any other quick alternative. Please help

    • BlueDevil Pro on June 19, 2018 at 8:42 am

      EnZ-

      Thank you for asking about your Isuzu Dmax. We do not currently have any retailers in Zimbabwe, however, you may purchase the product directly on our website at, https://store.gobdp.com/transmission-sealer-00236/ . Simply add the item to your cart and complete the checkout process.

      Thank you!

      -BDP

  31. Mark Ayres on November 27, 2018 at 6:38 pm

    I have a 1991 Ford Festiva that uses ATF as the transmission fluid in it’s 5 speed manual transmission. It is leaking. Its’ previous owner had the car sitting unused for about two years. Would Blue Devil Transmission Sealer work in it?

    • BlueDevil Pro on November 28, 2018 at 9:03 am

      Mark-

      Thank you for asking about your Ford Festiva. Yes, the BlueDevil Transmission Sealer is safe and compatible to use for the situation you have described. You will be using one oz. of the product per quart of fluid in the system, and should expect to start seeing results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  32. Marve Everson on May 11, 2019 at 1:07 pm

    I have an old bridestone 90 motorcycle that hasn’t ran in about 40 years and i recently got it running and its leaking a good amount oil coming out of the drive shaft on the transmission and i wanted to know if your sealant would work. They don’t make parts for it anymore so i cant replace the seal. The transmission takes about .6 liters of oil.

    • BlueDevil Pro on May 13, 2019 at 9:18 am

      Marve-

      The BlueDevil Oil Stop Leak is intended to treat leaks from rubber seals/gaskets that are seeping or lightly dripping. Based on your description, you may be losing oil a little too quickly for the product to be of any help. If the leak isn’t quite as bad as it sounds, you would use about half of an oz. of the product for a .6 liter oil capacity.

      Thank you!

      -BDP

  33. Bob on December 29, 2019 at 1:44 am

    Is the B D sealer compatable with a 91 mr2 s54 transmission?

    • BlueDevil Pro on January 2, 2020 at 9:46 am

      Bob-

      Yes, the BlueDevil Transmission Sealer is safe and compatible to use on the transmission you’ve described. You will be using one oz. of the product per quart of fluid in the system, and should expect to start seeing results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  34. danny on March 3, 2020 at 4:49 pm

    will this work ok for a Tremec TKO600 5 spd?

    • BlueDevil Pro on March 4, 2020 at 9:35 am

      Danny-

      As long as you are not losing transmission fluid too quickly, you would be a good candidate for the BlueDevil Transmission Sealer. You will start by adding one oz. of the product per quart of transmission fluid in the system, and should expect to start seeing results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  35. Tony Nixon on July 10, 2020 at 4:54 am

    I have a 1950 ford f2 with a 4 speed non synchro gearbox. Would it be safe to put in?

    • BlueDevil Pro on July 10, 2020 at 8:59 am

      Tony-

      The BlueDevil Transmission Sealer is only intended to treat rubber seals/gaskets. Unfortunately, it would not have any influence on cork, paper or rope seals. Unless the transmission was rebuilt at some point, the seals used on your 1950 Ford F2 would more than likely, not be rubber. The product does not harden or thicken in anyway, so it would not cause any adverse affects.

      Thank you!

      -BDP

  36. Tim Thomas on December 6, 2020 at 5:19 pm

    91 s10 chevrolet pickup 5 speed manual transmission leaving small to medium puddles of fluid leaking between motor and bell housing. Can blue devil help or fix leak.

    • BlueDevil Pro on December 7, 2020 at 9:41 am

      Tim-

      Thank you for asking about your Chevrolet. Based on your description, we would recommend using the BlueDevil Transmission Sealer. 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. You may top the system off with transmission fluid as needed.

      Thank you!

      -BDP

  37. Seina on December 7, 2020 at 1:35 am

    How much do I need to use of Blue Devil Transmission sealer on a 2010 Ford focus?

    • BlueDevil Pro on December 7, 2020 at 9:36 am

      Seina-

      You would be using one oz. of the BlueDevil Transmission Sealer per quart of fluid capacity in your transmission. You can check your owner’s manual to find the fluid capacities for your vehicle, and then use the corresponding amount of product. Be careful not to overfill the system.

      Thank you!

      -BDP

  38. brien mcluskey on August 8, 2021 at 9:54 am

    Gear box end plate leaking can i seel it or can I replace that part

    • BlueDevil Pro on August 9, 2021 at 8:26 am

      Brien-

      The product we manufacture for this type of leak would only be intended to treat rubber seals/gaskets. Replacing the gearbox end plate would be your best option.

      Thank you!

      -BDP

  39. christopher john harrison on September 30, 2021 at 3:51 am

    Does the ‘stop leak’ work in manual gearboxes as well as engines ?

    • BlueDevil Pro on September 30, 2021 at 8:47 am

      Christopher-

      Yes, BlueDevil would work to seal leaks in manual gearboxes as well. You would use one oz. of the product per quart of fluid. Expect to start seeing results after 100-200 miles of driving.

      Thank you!

      -BDP

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