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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Customer Reviews
Excellent service and honest advice....
John Monai
Excellent service and honest advice. They fixed my transmission issues quickly and professionally. They took the time to explain exactly what was wrong and gave me a clear estimate before starting. It’s hard to find a shop you can trust with complex transmission issues, but these guys are experts. Fast turnaround and excellent communication. Thanks for getting me back on the road
Date: February 16, 2026
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I had a problem with...
Ann O'Regan
I had a problem with my 2012 Honda Civic trani with 625km. I took it to Honda service for a diagnosis and it was confirmed to be the transmission.But repairs and new/used parts would be way too costly. For about 6 months knowing it could of been an engine mount issue due to strong vibration, a bit of gear slipping and some jerking while increasing speed...so I brought my car to Mr. Transmission in Pickering and was welcomed by a such a nice gentleman Chris, the owner Ken's son when I told him my issue. Right away we went for a test drive on the highway returned and did confirm and explained in detailed as a second opinion that I needed a new used trani and definitely a torq converter...he located a trani for me at a very great price with low kms and I chose to get the work done with him. A date was set when the trani was delivered. I dropped off my vehicle 2 days later at 9am. I rented a car at Enterprise Car Rental that morning as they were in the same automotive plaza. To my surprise, by 3pm, I received a call from Chris that the work for the transmission being replaced was complete in a very timely manner. I was ecstatic as I didn't expect to be done till the next day. I returned the rental and picked up my car. It's been running excellent like a brand new car as I do a lot of mileage weekly on my vehicle. I could not have been more happy about the whole experience with Mr.Transmission in Pickering with Chris. His customer hospitality, honesty, caring and very reasonable pricing made it all worth it explaining every detail what had to be done delivered professionalism and expertise at its best. I highly absolutely recommend this place to cater to all your transmission needs from a truly satisfied customer!!!!
Date: February 15, 2026
Website: Google
Amazing service! Pulled up less...
Yura Lisnik
Amazing service! Pulled up less than 1hour. Did great job reparing, Wasted no time, got straight to work and was done in timely efficient matter! Highly recommend to everyone in need of emergency repair.
Date: February 15, 2026
Website: Google
My experience with Mister Transmission...
Robert Grant
My experience with Mister Transmission was extremely positive. They took my car in at the exact time scheduled and I had the transmission repaired the same day in very short order. Very pleased with the service and would recommend this shop to anyone. Top notch!
Date: February 13, 2026
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Great pricing and great work
Wayne Lindsay
Great pricing and great work
Date: February 12, 2026
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Awesome place to go for...
Clinton Slaunwhite
Awesome place to go for any automotive needs, they only do the work required, and don’t push anything on you… Very honest . First, early diagnosis by looking at it, they believed it to be a damaged radiator, but after taking it apart, realized it was just a seal that needed to be replaced… They easily could’ve just changed the radiator and nobody would’ve known, instead they just replaced the seal and cut my Original quote by $600+ Highly recommend
Date: February 12, 2026
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Roma was a pleasure to...
Mariam Malang
Roma was a pleasure to deal with. Very honest and transparent about the problem and the cost to repair. Would highly recommend!
Date: February 12, 2026
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Great service and got our...
Bill Davidson
Great service and got our company truck back fast
Date: February 12, 2026
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Stu and Joe were very...
Colby Waldo
Stu and Joe were very helpful in finding parts that are near impossible with a great attitude towards everything and a fair price for fair work one of the few shops I'll ever recommend in red deer they do an amazing job hands down!
Date: February 12, 2026
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Great customer service and very...
Junaid Khalid
Great customer service and very honest; they did a road test and diagnostic for free and were incredibly helpful! Highly recommended
Date: February 11, 2026
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