Why Is It Necessary To Change Your Transmission Fluid?

March 10, 2021 | By Mister Transmission

Why Is It Necessary To Change Your Transmission Fluid?

Do you really have to change your transmission fluid or is it just one of those things that you’re supposed to do. We hate to tell you, but, yes, you do have to change your transmission fluid at some point to ensure a properly functioning transmission.

What Is Transmission Fluid?

Your transmission fluid is the lifeblood of your transmission. Most Canadians drive automatic transmission vehicles, which require automatic transmission fluid to lubricate the components within the transmission and it also acts as a coolant. Continuously variable transmissions (CVTs) also use transmission fluid. Manual transmissions vary. Some use transmission fluid, some use something called transmission oil, and some use standard motor oil. Automatic transmission fluid is optimized for automatic transmissions, but all these fluids provide lubrication.

What Problems Might You See With Your Transmission Fluid?

Checking your transmission fluid every month gives you the best chance of catching small problems before they grow big. But what are you checking for? First, check your fluid levels. If your fluid isn’t at the line, top it up. If you have to top it up every month, you probably have a leak, and your transmission needs to be resealed. But also check the quality for your transmission fluid. It should be mostly clear with a reddish hue (or in some rare cases, greenish). If your fluid is opaque or if it smells bad, then this is indicative of a larger problem. Apart from whatever other repair is necessary, your transmission fluid will need to be changed.

Do You Only Need To Change Your Transmission Fluid When There Are Problems?

If your transmission overheats, it can burn your transmission fluid. Burnt transmission fluid needs to be changed. To check your transmission, a tech might perform a pan examination, in which they will check your fluid for particulate matter. Some material in your fluid is normal, but there shouldn’t be a lot of it. Friction surfaces often wear down and, if left alone for too long, they’ll contaminate your fluid to levels that are too high. Then your fluid will have to be changed.

All these issues that require transmission fluid changes start somewhere else. But do you need to change your transmission fluid just as a precaution? Some manufacturers offer “fill-for-life” fluids and some transmissions are designed to be complete systems in which nothing goes in or out. But claiming something doesn’t make it true. No matter what kind of automatic transmission you drive, what kind of fluid you use, or where you drive, the Automatic Transmission Rebuilders Association recommends a transmission fluid change every 50,000 kms, or every two years.

Mister Transmission

To learn more about transmission fluid changes, please contact us.

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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Wishing the team at Mister...
Prescilia Banana
Wishing the team at Mister Transmission Milex Complete Auto Care continued success! If you’re looking for a local transmission and auto repair shop, they’re definitely worth checking out. Supporting local businesses is important, and I hope they continue providing great service to the Calgary community.
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Amazing automotive service,. Their online management system makes it easy to review the estimate, accept the quoted work , and pay for it.
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Diagnosis is spot on. Pricing is very fair and their srvice is great. Couldn't be happier.
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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.
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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.
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Excellent service
Camryn Hagan
Excellent service
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
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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
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⭐⭐⭐⭐⭐ 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!
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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!!
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