What Goes Into a Transmission Rebuild?

What Goes Into a Transmission Rebuild

The transmission rebuild is a specific kind of transmission repair. For many transmission problems, the necessary solution is a relatively simple one. Maybe a change of transmission fluid or switching out a solenoid pack. Unfortunately, however, not all transmission jobs can be done so swiftly. Sometimes, a transmission rebuild will be necessary. So what goes into a transmission rebuild?

Transmission repair

As mentioned above, the transmission rebuild is one of only many types of transmission repairs. It is also the most involved type of transmission repair. It’s a type of repair that is not meant to fix every problem. Many problems do not require such an endeavour. A transmission rebuild is necessary either when the cause of a transmission problem cannot be accurately identified or when the damage that a transmission has incurred is total or at least far reaching.

Transmission rebuilds

The first step in a transmission rebuild is the complete removal of the transmission from the body of the vehicle. This is necessary when the part that is thought to be causing the problem is not accessible while the transmission remains within the body of the automobile. When the suspected problematic part is replaced, this might solve the problem. However not all problems are solved so easily.

In some cases a complete rebuild is required. A complete rebuild consists of the removal and disassembly of the transmission in its entirety. Every part is inspected for wear and damage, and then it is cleaned in a special cleaning solution, or it is replaced with another part depending on its condition. Parts that have friction surfaces, such as bands and clutches, are replaced as are all seals and gaskets. The torque converter should also be replaced, often with a re-manufactured one.

Technicians will also check technical service bulletins to see if the auto manufacturer recommends any modifications to correct design flaws that were discovered after the transmission was built. Automobile manufacturers often make upgrade kits available to transmission shops to resolve these design defects.

As you can see, the transmission rebuild is a significant undertaking and takes hours of labour to complete. But it is a holistic approach; any problems your transmission has been experiencing are bound to be addressed through this process. The transmission rebuild should add a number of years on to the life of your transmission.

Rebuild or overhaul

You may have heard of transmission overhauls before. If so, you’re probably asking yourself what the difference is between a transmission rebuild and a transmission overhaul is? Well, that’s a simple question to answer. A transmission rebuild is a transmission overhaul; they mean the same thing.

If your transmission requires a rebuild, you have two options. The first is to remove your existing transmission and rebuild it, then put the rebuilt unit back in your car. The second option is to replace your existing unit with another unit that has already been rebuilt or re-manufactured.

However, used transmissions often have questionable histories that could create a whole new slew of issues. New transmissions, meanwhile, are mostly aftermarket transmissions billed as new but are in fact rebuilt transmissions with new parts.

Contact us

If you have any questions about transmission rebuilds or would like to bring your vehicle in for a transmission repair or maintenance, please contact us today and we’d be happy to help you out.

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
Took me from broken to...
Jamie Stubbs
Took me from broken to brand spanking new, vehicle runs like a top. Thanks boys. 👏🏼
Date: July 1, 2026
Website: Google
They went over and above...
Richard Reddecopp
They went over and above to ensure I got back on the road safely!
Date: July 1, 2026
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Please read this. I noticed...
Smith
Please read this. I noticed your business has some negative reviews that may harm it. If you want to remove negative reviews from your Google Business contact me via the details in my profile.
Date: June 30, 2026
Website: Google
Great customer service from the...
Kyle Adam
Great customer service from the owner Steve and the rest of his crew, they went above and beyond in having my transmission repaired within the very short time frame that it was needed. Tiana did an amazing job, my car now drives like a dream with no complaints at all! Very honest and professional shop, would 100% recommend, will definitely be bringing all my future business here.
Date: June 30, 2026
Website: Google
Anas and Adeeb were knowledgeable,...
Megan Bethlehem
Anas and Adeeb were knowledgeable, honest and kind. They were able to diagnose the problem and resolve it immediately. I would highly recommend this shop and both techs.
Date: June 30, 2026
Website: Google
Please read this. I noticed...
Smith
Please read this. I noticed your business has some negative reviews that may harm it. If you want to remove negative reviews from your Google Business contact me via the details in my profile.
Date: June 30, 2026
Website: Google
I can’t say enough good...
Felix Cheng
I can’t say enough good things about Giorgio and Mr. Transmission in West Mississauga. I’ve brought my vehicle to him several times over the last two years, and his calm, knowledgeable approach is always so reassuring. I initially chose him because of his outstanding customer reviews, and now I completely understand why everyone praises him. He is practical, honest about repair options, and sincerely cares about helping his clients. Thank you, Giorgio!
Date: June 30, 2026
Website: Google
Honest , fast and overall...
Tim Higgins
Honest , fast and overall amazing experience with these guys, highly recommended.
Date: June 29, 2026
Website: Google
These guys are very good....
Doug Waugh
These guys are very good. We have a dealership and bring them all our transmission work.
Date: June 29, 2026
Website: Google
Giorgio did a great job...
Ivan Beros
Giorgio did a great job on rebuilding my transmission
Date: June 28, 2026
Website: Google
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