What is a transmission overhaul?

By Mister Transmission

transmission overhaul

As with many components of your automobile, the earlier you spot an issue with your transmission and bring it in for a repair, the greater the chance that the repair will be relatively quick and simple. Of course, it is not always easy to identify transmission problems nor can all problems be, “nipped in the bud”, so to speak. Nevertheless, it is always best to bring your vehicle in for an inspection and possible repair at the first sign of trouble.

If you don’t, (and, sadly, sometimes even if you do) you could be facing a transmission overhaul. A transmission overhaul is a very detailed and involved type of repair. Just what goes into it can be complicated, so this article will endeavour to explain the details of a transmission overhaul.

Transmission repair

The truth is that a great deal of transmission repairs can be done relatively painlessly. It’s impressive how many problems can be resolved by topping up or changing out the transmission fluid as well as maybe repairing a leak. But this is not a catchall; there are a number of transmission problems that this won’t repair.

Sometimes, a part needs to be replaced. Skilled technicians can often identify which part it is by running various tests and diagnostics, both physical and digital in the case of computer controlled transmissions. There are a number of parts that are accessible without requiring the removal of the complete transmission from the body of the vehicle.

The parts that are accessible, however, vary from transmission to transmission and most transmission repair facilities would hesitate to provide meaningful warranties on external repairs for the simple reason that they cannot see if there are any additional internal problems in the components that are only accessible by transmission removal. And of course, there are many parts that are not accessible. In these cases, you’re looking at a complete overhaul.

Transmission overhaul

A transmission overhaul (also known as rebuilding a transmission) requires the removal and disassembly of the transmission in its entirety. Every part of the transmission is inspected for wear and damage, and then it is cleaned in a special cleaning solution, or 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 is also replaced, usually with a re-manufactured one. Technical service bulletins are checked to see if the auto manufacturer recommends any modifications to correct design defects 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 tell, a transmission overhaul is serious business. It is not a first resort nor is it a quick and simple job. Responsible technicians will only recommend a transmission overhaul if the problem your transmission is experiencing is a severe or unknown one. However, the plus side of a transmission overhaul is that it is so complete that it often prevents the development of any future serious transmission problems for a long time to come.

Contact us

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

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Customer Reviews
Special thanks to Gus and...
Beg NAHIDuzjaman
Special thanks to Gus and Ray from Mister Transmission located at 4950 Sheppard Ave. E. Scarborough Toronto. They are very simple to help you. They are very sweet, when you need their service. They are completely sound to provide their service. Their chemistry is the best for customer service and ultimate satisfaction.
Date: April 12, 2026
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Great service
Nathalia Fernandes
Great service
Date: April 12, 2026
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Top notch customer service -...
Kevtheschmidt
Top notch customer service - kept me informed of what was needed at every step of the way. Also dealt directly with our extended warranty provider, saving time and hassle.
Date: April 12, 2026
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Was recommend to go here...
Andrew Lawhead
Was recommend to go here to look into my transmission issues, they diagnosed and replaced the transmission. Very professional
Date: April 11, 2026
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I brought my 2012 Honda...
Suji
I brought my 2012 Honda Civic in after another shop told me I needed a total transmission replacement. The car was in limp mode, wouldn't move in drive, and was revving erratically. Gus and Ray were amazing. They actually took the time to diagnose the real issue instead of just guessing. It turned out to be the accelerator pedal and a need for a transmission fluid service. They saved me thousands of dollars and got me back on the road. Professional, honest, and highly recommended.
Date: April 10, 2026
Website: Google
An honest garage that I...
Marjan Joe
An honest garage that I would recommend to anyone.Had a safety issue that needed to be addressed quickly. I was able to bring my car in the same day I called and had the pleasure of dealing with Ken.He went above and beyond, diagnosing the problem quickly, providing updates, checking in to see if I was OK with the work that was needed, and following up afterwards to make sure there were no issues.
Date: April 10, 2026
Website: Google
Highly experienced and professional Team!...
Sultan Mahmood
Highly experienced and professional Team! Incredible customer service!
Date: April 10, 2026
Website: Google
Mark was absolutely fantastic to...
Jeremy Bakker
Mark was absolutely fantastic to deal with, incredibly knowledgeable, and very reasonable prices. I will continue to use Mr. Transmission for any future repairs. Thanks again Mark!
Date: April 10, 2026
Website: Google
Highly recommend Mr transmission. They...
D C
Highly recommend Mr transmission. They worked with me in every way possible and were straight up about everything that needed work. And didn’t push to do work that I could hold off for a while. They were very accommodating to me to work with in my budget. Even talked to manager and also talked to the technician. To help me understand what work needed to be done.Very happy customer and will recommend to all my friends for sure.
Date: April 10, 2026
Website: Google
I brought my 2012 Honda...
Suji
I brought my 2012 Honda Civic in after another shop told me I needed a total transmission replacement. The car was in limp mode, wouldn't move in drive, and was revving erratically. Gus and Ray were amazing. They actually took the time to diagnose the real issue instead of just guessing. It turned out to be the accelerator pedal and a need for a transmission fluid service. They saved me thousands of dollars and got me back on the road. Professional, honest, and highly recommended.
Date: April 10, 2026
Website: Google
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