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
I drive a Lancer with...
Manav Sachdeva
I drive a Lancer with a CVT with a mileage of 225k on the dash! Was worried about my transmission and decided to take it to them.I live in Cochrane which is 8 hour away from the place... was impressed by the words I have heard about them. So I decided to drive 8 hour and get it done from them. Gus was the gentleman who served me very well with the information and services.They did a whole checkup and service and were impressed with the service while driving back! Was happy paying for the service as the Transmission cost almost 10k for my car!So super happy at the end and would highly recommend to pay the price for the excellent service!
Date: March 19, 2026
Website: Google
Had my car’s transmission rebuilt...
Sylvie Levesque
Had my car’s transmission rebuilt there, excellent service….Kirsten is so knowledgeable and kept me informed every step of the way …. with no surprise 😊
Date: March 18, 2026
Website: Google
Called to book an appointment...
Jack M.
Called to book an appointment few days prior, I came in with the part and needed a seized bolt removed, possibly drilled and tapped. They got to it the next day, and only charged me 1 hour of labour. Very pleased and will be returning for major transmission work in the future. Highly recommend them. (Toyota Tundra 2012)
Date: March 18, 2026
Website: Google
Love this place. They worked...
Jeremie Lance
Love this place. They worked with my warranty company on my behalf better than I could have ever done. Kristins professionalism and experience at the front desk was very appreciated. They made my ford f150 10 speed transmission better than it ever was. Ive waited to write this review to confirm this.
Date: March 18, 2026
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What an experience! This is...
Sarah Cini
What an experience! This is a business rooted in customer care for decades. Julie and the expert team of Mr. Transmission cared for us wholeheartedly through the entire experience. They educated us through each detail carefully. They sourced many options for us to make decisions on and had clear and consistent communication with us. They gave us ample time to make big decisions... An experience that I would only say we were NURTURED through.Thank you Julie and team ✅
Date: March 18, 2026
Website: Google
Mister Transmission is the perfect...
Dave N
Mister Transmission is the perfect place to have your transmission serviced! These guys are legit transmission experts and will do their best to figure out a reasonable solution to the problem that you're experiencing!I brought my car in for a transmission fluid and filter pan change and am happy with the service and treatment that I received. Aki and Sal are honest guys and do a great job at explaining the transmission parts and service that they are performing. My car has a ZF transmission and I purchased the pan and fluid and had them install it. My transmission is shifting beautifully, and this will definitely help prolong the life of the transmission!Great job guys! 😊
Date: March 18, 2026
Website: Google
Came in for help with...
Cindy L
Came in for help with a problem with my manual 2014 Honda. I had trouble getting responses from other transmission places, but Chris was very friendly, accessible, and responsive right from the start. He was very clear with his communication and straightforward with my options. As someone who feels a bit less comfortable with mechanics and auto stuff, I enjoyed how welcoming all the interactions were. I will definitely be back for any transmission challenges I have down the road!
Date: March 18, 2026
Website: Google
Took my truck in for...
Erika
Took my truck in for a transmission repair and the team was able to get me in really quickly, in less than a week. They had a unit on the shelf and saved my Christmas trip! Big shout out to the entire team for their amazing customer service, they kept me informed throughout the whole process. Love my truck!
Date: March 17, 2026
Website: Google
Well I didn't expect the...
Jim Harvey
Well I didn't expect the amazing service I got when I went to Mr Transmission. I explained my issue to Julie at the front counter and she got a technician from the back named Mike to help me. He fixed the problem within minutes and was very knowledgeable. I will definitely return here if I need help to see Julie and Mike. Well done guys. I would recommend this location at Walker and Tecumseh to anyone.
Date: March 17, 2026
Website: Google
Took my truck in for...
Erika
Took my truck in for a transmission repair and the team was able to get me in really quickly, in less than a week. They had a unit on the shelf and saved my Christmas trip! Big shout out to the entire team for their amazing customer service, they kept me informed throughout the whole process. Love my truck!
Date: March 17, 2026
Website: Google
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