How and When Should I Change My Transmission Fluid?

By Mister Transmission

How and When Should I Change My Transmission Fluid

Transmission fluid is the lifeblood of your transmission. Transmission fluid acts as a lubricant to help keep everything running smoothly and efficiently. That is, of course, assuming that you have good levels of clean transmission fluid in your transmission. To ensure this at all times, you should regularly change your transmission fluid. But how and when is sometimes a matter of debate.

Transmission fluid

There are many transmission problems that can be caused or exacerbated by an inadequate quantity or quality of transmission fluid. If you are driving around with either very old or not enough transmission fluid (or worse still, both), you are accelerating the wear and damage on components within your transmission. Taking the time to change it out when necessary could save you loads of time and money in the end by extending the lifespan of your transmission.

When to change your transmission fluid

Just when you should change out your transmission fluid will vary depending on what kind of transmission you have, what vehicle you drive, where you drive, how you drive, and how much your drive. But for a very rough estimate, for an automatic transmission, you ought to change your fluid every 50,000-100,000 kms. 100,000 kms is in the far reaches of the acceptable range, mind you. The Automatic Transmission Rebuilders Association suggests every 50,000 kms or every two years.

For manual transmissions, you should change the fluid about every 50,000-90,000 kms, however, under intense use, some manufacturers suggest changing it as often as every 25,000 kms. The reason for the difference between automatic and manual transmissions is because they take different fluids. Automatic transmissions take –get this– automatic transmission fluid. For manuals, it is a bit more complicated. They might take any of a variety of oils: regular motor oil, heavyweight hypoid gear oil, or even automatic transmission fluid in some cases. Your owner’s manual will tell you which is best for your transmission.

How to change your transmission fluid

To change out your transmission fluid, first let your car idle for a few minutes. After turning your ignition off, raise and secure the vehicle. Lay down at least a two-gallon catch pan, then carefully remove the bolts from one side of the transmission pan and then the other bolts, allowing the pan to tilt and drain. Once you’ve removed all the bolts, lower the pan and dump the remaining fluid into the catch pan.

After that, remove the old transmission filter and O-ring. The filter contains fluid, so keep the drain pan underneath. Install the new transmission filter, and make sure that the O-ring is in the appropriate place. Attach the new gasket to the pan with oil-soluble grease – not gasket sealer or adhesive.

Screw in all the fasteners finger-tight. Torque the pan bolts to spec in a spiral pattern starting at the center. Maximum torque is often about 12 pounds per foot. Then, lower your automobile and fill the transmission with the recommended amount of fluid. Finally, turn your engine on to check for leaks.

Contact us

As you can see, changing your transmission fluid is quite involved. If it seems like much of a hassle for you, please contact us at Mister Transmission and we’d be happy to do it for you. We can also “flush” your transmission fluid out, taking out more metal shavings and debris.

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AMAZING
Great people very easy to deal with very kind and helpful reasonably priced for what they did for me. Great warranty with the workmanship as well. Was told any issues whatsoever to bring it back and would be taken care of immediately.
Date: November 4, 2025
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They did a great job...
Gurpiar SIDHU
They did a great job working with my car, and make it ready as quickly as possible. And at the same time, they provide me the loaner car. And fix the in a timely manner. Transmission is working great after the rebuild, and the good thing is that they cover nation wide for the warranty. Kyle and the other team members really understand the issue and make it really worth it for me. Highly recommended to everyone. Thanks again for your honest advice and service.
Date: November 4, 2025
Website: Google
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Aleks Konte
Thank you Bob and crew on your great service. Come here for your transmission, transfer case and differential maintenance or repair.
Date: November 4, 2025
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Monique Fournier
Very pleasant experience. Professional , fast, efficient customer service. Honest with diagnostics. Will definitely return if transmission issues arise. Thank you for your honest service.
Date: November 3, 2025
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It was so hectic with...
Margie
It was so hectic with the transmission of our car. They are experienced and efficient and finally the problem is gone
Date: November 3, 2025
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Lesley Becker
So helpful, great integrity! Took the time to fully answer all my questions and kept me informed throughout, highly recommend!
Date: November 2, 2025
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I recently had my car’s...
Gurjeet Kailay
I recently had my car’s transmission replaced here, and I’m extremely happy with the service. The team did an excellent job — the car runs smoother than ever, and everything was completed on time and professionally. They kept me updated throughout the process, explained everything clearly, and made sure I was comfortable with the repairs. It’s rare to find a shop that’s both skilled and honest, but they definitely are. I really appreciate the attention to detail and the care they took with my vehicle. Highly recommended to anyone needing reliable and quality work!
Date: November 1, 2025
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Great experience and great service.
Jake Fernandes
Great experience and great service.
Date: October 31, 2025
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Stu is fantastic at the...
Greg Debogorski
Stu is fantastic at the front with his calm and helpful demeanor. The Techs. we're also great in their explanations of what they did. This gave me confidence in their work completed on my truck. I will definitely go back and highly recommend others to go their for their funky transmission needs.
Date: October 31, 2025
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Craig Lypps
Great service,friendly.Fast and efficient.Devons a great front office person.
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