How and When Should I Change My Transmission Fluid?

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.

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
Diagnosis is spot on. Pricing...
Steven Beres
Diagnosis is spot on. Pricing is very fair and their srvice is great. Couldn't be happier.
Date: August 1, 2026
Website: Google
This shop is great, they...
Dave In
This shop is great, they worked on my daughter's 2013 focus in 2017. When Ford would not honour their warranty. It is still going strong. I was told the transmission will out live the car. Well yes. It's time for a new veh with. Worked on my 2003 F150, great work, now my 2010, once again great work. They took time to find a miss, in the truck. I'm a car guy, and know shops that do great work. Yes everyone is never happy with the work. But for me there is always two sides.
Date: August 1, 2026
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I was quite impressed with...
Shirl Yuen
I was quite impressed with the work done on rebuilding my transmission from Mr Transmission located on Pembina Hwy. My vehicle drives so smooth now. Their friendly service also helped with the experience.
Date: August 1, 2026
Website: Google
⭐⭐⭐⭐⭐ What others thought was...
Kelvin Orifa
⭐⭐⭐⭐⭐ What others thought was a transmission issue turned out to be just a hose assembly that needed replacing. Chris and the team diagnosed it correctly. Highly recommended. Thanks, guys!
Date: July 31, 2026
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They were fantastic! I went...
Sebastián Buitrago
They were fantastic! I went in the middle of summer and was really busy as expected, however, they made all the repairs to my car way earlier than they originally promised (these guys literally work overnight shifts in summer to accommodate all their clients). Great customer service too! Highly recommended!
Date: July 31, 2026
Website: Google
Great people and great service....
Rebbeca Duncan
Great people and great service. Chris is amazing to deal with! We’re from out of province and they helped us out with our sons car, got it in and fixed in great time! highly recommend!
Date: July 31, 2026
Website: Google
Excellent service
Camryn Hagan
Excellent service
Date: July 31, 2026
Website: Google
I got stranded in Canada...
Abigail Schuen
I got stranded in Canada after my car broke down after crossing the U.S. border and Mister Transmission was a life saver!! They fit us in even though they were busy, let us sit inside until we figured out next steps, and even drove us (and all of our roadtripping stuff) to the car rental facility! They truly helped us figure out what were our best opinions and eased so much stress. I cannot reccomend Mister Transmission enough!!
Date: July 31, 2026
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I want to give a...
Matt Street
I want to give a huge thank you to Cecil and the team for going above and beyond to take care of one of my customers. My customer broke down in Golden with their 2015 Dodge Grand Caravan and was quoted an extremely high price for only a temporary repair. I didn't recommend going that route, so I called Cecil. Without hesitation, he said he would pick up the van on Monday. By Wednesday, he called to let me know he was dropping it off at my shop in Kelowna with a fully rebuilt transmission, complete with all the latest updates, ready for my customer to pick up. Cecil, Brandon, and Fred have done it again. Their commitment to customer service and doing the job right is second to none. Thank you for always looking after our customers. I look forward to many more years of working together and continuing to provide the best service possible.
Date: July 30, 2026
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Job got done
Colin Morrison
Job got done
Date: July 30, 2026
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