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
Awesome team. Transmission is now...
Yoshipark99
Awesome team. Transmission is now smoother and more responsive. 4L60E full rebuild. Great job and pretty fast. Cole from Tillsonburg
Date: July 18, 2026
Website: Google
One of the best experiences...
Wayne King
One of the best experiences I have at a repair shop. I had transmission problems that I expected would cost hundreds of dollars to fix. Ended up it was just some rust seizing a linkage - they cleaned it up and didn't even charge me anything works fine now and I couldn't be happier - will be recommending them to everyone.
Date: July 18, 2026
Website: Google
Mister Transmission just rebuilt the...
Julie Watton
Mister Transmission just rebuilt the transmission in my sprinter van. Called them on a Monday, Wes diagnosed the problem on Tuesday and van was ready by Friday! Wes was super knowledgeable, provided options and even showed me the problem. Chris at the front desk has excellent customer service! Very happy with the experience.
Date: July 18, 2026
Website: Google
Awesome team. Transmission is now...
Yoshipark99
Awesome team. Transmission is now smoother and more responsive. 4L60E full rebuild. Great job and pretty fast. Cole from Tillsonburg
Date: July 18, 2026
Website: Google
Resolved my issue and provided...
C M
Resolved my issue and provided a loaner car as I was out of town.
Date: July 17, 2026
Website: Google
Amazing experience will definitely recommend....
Les Karapancsik
Amazing experience will definitely recommend. Took their time and easily found the problem that other shops could not find
Date: July 17, 2026
Website: Google
100% reliable. Excellent service deliver...
Jose Duran
100% reliable. Excellent service deliver by true experts
Date: July 17, 2026
Website: Google
We’re from Winnipeg and began...
Tara McLauchlan
We’re from Winnipeg and began having transmission issues just outside of Ottawa. We had our campervan towed to this location, where they went above and beyond with their service. Kristin was friendly and knowledgeable and kept us promptly updated to our repair status. Mike the service tech worked so hard to get us back on the road in a safe and timely manner. This location worked in communication with our Winnipeg location to honor the nationwide warranty, even though we were 6000kms over the warranty threshold. We are so thankful for all their hard work and kindness.
Date: July 17, 2026
Website: Google
Staff were extremely helpful and...
Mark Saigeon
Staff were extremely helpful and informative and gave me the peace of mind I needed. They could have taken advantage of my lack of knowledge but showed great integrity. Thank you.
Date: July 17, 2026
Website: Google
We’ve been taking our Promaster...
Tara McLauchlan
We’ve been taking our Promaster campervan to this location for years. Their service has always been fast, friendly and fair. They’ve been able to repair anything we’ve asked of them. We recently took our van on a cross Canada road trip, we ended up having issues with our transmission just outside of Ottawa. Phil from Mr Transmission Winnipeg, was able to communicate with the location in Ottawa to honour the nation wide warranty. Even though we were 6000 kms over our warranty, Phil covered all the repairs under warranty and was checking in to make sure we got back on the road safely.
Date: July 17, 2026
Website: Google
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