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
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Owen Chabot
Very honest and thrusting with their work
Date: October 14, 2026
Website: Google
My F-150 was badly leaking...
David Tenenbaum
My F-150 was badly leaking transmission fluid and the dealer could not have a slot for me for >5 days. I had it towed to Mr. Transmission, and cannot tell you how impressed I am with Carlo and his crew. He does a great job putting you at ease, his team is top notch, they delivered the fixed truck on time and on price, and in a world where good service and competence are increasingly rare, this shop stands out as one of the best. Truly impressive!
Date: October 14, 2026
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Service was great and quick....
Edwige Grâce
Service was great and quick. Staff was welcoming and friendly.
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Hello Mate ,I have to...
Harvey Matthew
Hello Mate ,I have to discuss an important problem,but you didn't give Whatsap on profile,I am Unable to conact.😔,Can you plz come on watsp Via Bio. It's Very Important 🙏
Date: October 14, 2026
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I had a really great...
Lihua Han
I had a really great experience with this auto repair shop! The first time I came here, he was very patient and took the time to listen to my concerns. He also noticed an engine oil leak that could have been a safety issue and made time to fix it right away. The price was very reasonable, and I really appreciated his professionalism, patience, and kindness. That’s why I decided to keep coming back to this shop. Highly recommend!
Date: October 14, 2026
Website: Google
Mr. Transmission provided an excellent...
Kiyahna Ryan
Mr. Transmission provided an excellent experience from start to finish. The staff were patient, friendly, and professional, taking the time to understand my needs and help me achieve my goals. I truly appreciate their outstanding service and quality of work. I would highly recommend Mr. Transmission to anyone looking for reliable and professional service.
Date: October 14, 2026
Website: Google
Great people. Very fair and...
Ken McLean
Great people. Very fair and transparent
Date: October 13, 2026
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Was very helpful getting my...
Cameron Frith
Was very helpful getting my transmission fluid changed on a 280,000km car. Made sure the car was running right by doing a test drive before and after the appointment, and let me know of something else that needed fixing without pushing me to schedule another appointment so I wasn't running broken was tremendously nice!
Date: October 12, 2026
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To Chris & Team at...
Darrin Brady
To Chris & Team at Mr Transmission #127, It is wirh grear pleasure to post a 5 Star (well deserved) review for your EXCEPTIONAAL SEVICE and timely reults while helping restore my 2008 JEEP LIBERTY Sport Your expertise and communication was Top shelf and sinceely appreciated to quickly diagnose , locate parts and have me me back on the road in 3 days was insane! Thanks for turning a headache in to an enjoyable interaction. Will see you in 500km for a follow up as recommended. All th Best, Darrin Brady
Date: October 12, 2026
Website: Google
Attentive service, prompt calls for...
Ambra A
Attentive service, prompt calls for updates and made a courtesy car available for me. Very much appreciated!
Date: October 11, 2026
Website: Google
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