How to Change Transmission Fluid

Determining the frequency of transmission fluid and filter changes hinges on many factors

Transmission fluid: it is the lifeblood of your transmission. Without it, your vehicle would cease to run. You need to have the transmission fluid and filter changed at recommended intervals as per your vehicle’s owner’s manual, and a transmission flush ought to be performed at least once every three years.

Transmission fluids serve three purposes: it serves as the hydraulic element within the transmission regulating gear changes, it keeps the transmission clean and lubricated, and it cools the entire transmission system.

There is a lot of friction happening within the transmission. These mechanisms are designed to work with the full capacity of transmission fluid. If the levels drop, that friction is less productive and more damaging. Over time, heat will break the fluid down and be unable to lubricate the system effectively. That puts pressure on the transmission to work harder to pump fluid through the filter.

Checking Your Transmission Fluid Level

If you are experiencing performance issues with your vehicle, you may wish to check your car’s transmission fluid level. But be advised: checking your transmission fluid level can be risky as you need to keep the engine running.

Moreover, in some modern vehicles, it is no longer possible for the average motorist to perform a transmission fluid check. It is advisable to have trained, experienced transmission technician inspect your transmission and the quality of the fluid in it.

Though your vehicle’s owner’s manual will make recommendations as to the required frequency of changing the transmission fluid and filter, you should also weigh the type of driving you do, and the environment where you drive. If you have high mileage on your vehicle, drive in mountainous or hilly terrain, regularly tow a trailer or boat, or if you’re hauling heavy loads, have your transmission inspected annually.

Preventative Maintenance Is Your Best Protection

Although there are no guarantees you can avoid a transmission failure no matter how well you treat your vehicle, you can reduce the risk of a transmission malfunction by ensuring preventative maintenance is performed regularly by a professional.

For more than 50 years, Mister Transmission has kept Canadian motorists on the road by ensuring the transmissions in their vehicles are in tip-top shape. If you have a question about your transmission or want to book a service appointment, contact the Mister Transmission service centre nearest to you.

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Mister Transmission Team

The Mister Transmission team consists of certified transmission specialists with decades of combined experience in diagnosing, repairing, and maintaining automatic and manual transmissions.

With over 60 years of service across Canada, our experts provide trusted, accurate, and up-to-date automotive advice to help drivers make informed decisions about their vehicles.

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Customer Reviews
Brilliant customer service with easy...
Kaidyn Landry
Brilliant customer service with easy to talk to employees, they booked and completed my inspection next day and within 15 minutes. Very well informed employees, and honest opinions with no undercutting. Certainly the place to go to for any vehicle problems for anyone
Date: July 15, 2026
Website: Google
I’m very happy with the...
Adrian Ursache
I’m very happy with the service I received at Mister Transmission. Even though they had no openings, Chris understood my situation and managed to fit me in. He took the time to help with my transmission problem, and I truly appreciate it. Highly recommended!
Date: July 15, 2026
Website: Google
The staff at Mister Transmission...
Shane Wallman
The staff at Mister Transmission were very helpful when I needed it most. They stayed open late to scan my vehicle and get me out of a jam. Would recommend anytime!
Date: July 14, 2026
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Great shop! Have fixed us...
Mike Ackerman
Great shop! Have fixed us up a few times. Honest, tells it like it is.
Date: July 14, 2026
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Short and sweet. Had a...
Mike LeFebvre
Short and sweet. Had a Trans done in Pickering. Had a problem with seal leakage. Returned to Pickering location and no longer there. Drove to Mr Trans on Westney 195. Explained my problem. Steven the manager spoke to tech Tom and gave me a solution. Tom dismantled complete Trans. Found some serious flaws and proceeded to remedy them. Their work ethic customer service is top notch. Dealing with these guys is both comforting and educational. I highly recommend this specific shop for all transmission work bar none. Thanks again Steven and Tom. .
Date: July 14, 2026
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Great spot to go to!...
Blane Johnson
Great spot to go to! I would not hesitate to go back, they are honest from the start.
Date: July 14, 2026
Website: Google
Excellent customer service from start...
Armando
Excellent customer service from start to finish !!! Aki/Manager ,Jody/Service Advisor and Sal went the extra mile to get the transmission connector pipe from an out of town parts dealer as the local dealer was unable to deliver it on time as promised. They replaced the leaking pipe due to rust perforation and also proactively recommended replacing the other rusted transmission pipe above it for peace of mind. This is a common problem for some Toyota Highlanders and Matrix models.The time it took to do the job by lowering the sub-frame was accurate and professionally completed. I highly recommend this branch.
Date: July 13, 2026
Website: Google
If you want to remove...
Mia Johnson
If you want to remove negative reviews from your Google Business, contact me via my profile; my contact details are listed there. After work you can pay..
Date: July 13, 2026
Website: Google
If you want to remove...
Mia Johnson
If you want to remove negative reviews from your Google Business, contact me via my profile; my contact details are listed there. After work you can pay..
Date: July 13, 2026
Website: Google
Excellent customer service from start...
Armando
Excellent customer service from start to finish !!! Aki/Manager ,Jody/Service Advisor and Sal went the extra mile to get the transmission connector pipe from an out of town parts dealer as the local dealer was unable to deliver it on time as promised. They replaced the leaking pipe due to rust perforation and also proactively recommended replacing the other rusted transmission pipe above it for peace of mind. This is a common problem for some Toyota Highlanders and Matrix models.The time it took to do the job by lowering the sub-frame was accurate and professionally completed. I highly recommend this branch.
Date: July 13, 2026
Website: Google
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