Transmission Repair & Service Whitby, Ontario

Pinpointing the exact cause of any transmission problem takes skill, knowledge, and investigation

The evolution of transmissions has made these machines and systems increasingly complex. When transmission repairs are required, determining the cause and cure for what ails can be tricky. Why? Because transmissions have become remarkably complex and computerized and that presents both advantages and disadvantages. On one hand, transmission performance has become noticeably better in all vehicle makes and models. On the other, the increased complexity and digitization of transmission systems has made repair work a highly technical and complicated affair.


As you can imagine, there are different types of transmission repair jobs and options you can choose from depending on the nature of your vehicle’s breakdown. Understanding what those options are can help you make informed decisions when faced with a choice of transmission repairs to weigh.

A Repair for Every Type of Transmission Malfunction

Some transmission repair work is straightforward and mechanical in nature. Other times, it’s a combination of mechanical and electronic engineering that’s required to get your car back on the road. The most common types of repair work include:

  • Adjustments and in-car repairs. Most minor repairs are simple matters that are done without removing the transmission from the vehicle. If yours is a computer-controlled transmission that is not shifting properly, it is often the result of a computer sending incorrect signals due to a faulty sensor, or the transmission is not reacting to the command because of a bad connection or defective solenoid pack. If a non-computer controlled transmission is shifting too early or too late, it may require an adjustment to the throttle cable. If the vehicle has a vacuum modulator instead of a throttle cable, there is an adjustment that can be made using an adjustment screw in some designs. In vehicles with modulators, however, it is important to ensure there are no vacuum leaks and that the engine is running at peak efficiency.
  • Reseal jobs. A transmission is re-sealed to repair external transmission fluid leaks. If you see spots of red oil on the ground under the car, your transmission may need a re-seal job. To check a transmission for leaks, a technician will put the vehicle on a lift and examine the unit for signs of oil leaks. If a leak is spotted at any of the external seals or gaskets and the transmission otherwise performs well, the technician will most likely recommend that the transmission be re-sealed. Most of the external seals can be replaced while the transmission is still in the car but, if the front seal must be replaced, the transmission must first be removed from the vehicle to gain access to it.
  • Replacing accessible parts. There are a number of parts that are accessible without requiring the removal of the complete transmission. 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.
  • Complete overhauls. Also known as “rebuilding a transmission”, a complete overhaul involves the removal and disassembly of the transmission in its entirety. Every part is inspected for wear and damage, then 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 remanufactured 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.

Replacing or Overhauling a Transmission

When a transmission requires an overhaul, there are two options that you may have. The first is to remove your existing transmission and overhaul 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 remanufactured.

A word to the wise: replacing your transmission with a used one may not be your best option. Used transmissions often have questionable histories that could create a whole new set of challenges. New transmissions, meanwhile, are mostly aftermarket transmissions billed as new but are in fact rebuilt transmissions with new parts.

The cost of the repair is always top-of-mind and understandably so. Transmission repairs are usually unexpected (and unwelcome). The cost varies depending on the outcome of our diagnostic testing, and we will help you to understand the various factors that come into play. We also offer our customers flexible payment options.

Whichever route you choose, you can trust our transmission experts to get you and your car back on the road.

Visit Mister Transmission for an assessment on what transmission repairs you may need. Contact the Mister Transmission service centre nearest to you.

Featured Services
Transmission Repair

The evolution of transmissions has made these machines and systems increasingly complex. When transmission repairs are required, determining the cause and cure for what ails can be tricky.

Learn More
Transmission Technology

At Mister Transmission we have access to leading-edge diagnostic equipment, enabling us to offer you the fastest and most accurate findings about what’s going on inside your vehicle’s transmission.

Learn More
Transmission Maintenance & Service

Just as you have other parts of your car serviced, your transmission needs maintenance to ensure a long life and avoid transmission problems.

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Customer Reviews
Great place, very professional and...
Larry Malm
Great place, very professional and honest, great people to deal with, would highly recommend. Thanks for the awesome service!
Date: June 6, 2023
Website: Google
Staff is extremely helpful. The...
Mallia MacDonald
Staff is extremely helpful. The receptionist is amazing explains things well. I’m very happy with the work that was done!
Date: June 2, 2023
Website: Google
Great service. Helped us tremendously....
Stacey Delaney
Great service. Helped us tremendously. Highly recommended
Date: May 18, 2023
Website: Google
Under promise, over deliver! Denise...
Tom Walton
Under promise, over deliver! Denise and her team did just that. Obviously when dealing with transmission problems your day isn't going well, but Denise made it better, she dealt with the warranty company and my car was ready 3 days earlier than expected. Thanks to Mike and Karen of Master Mechanic Oshawa for the referral!
Date: April 27, 2023
Website: Google
Great experience with mister transmission!...
Lauren Decoste
Great experience with mister transmission! I called about some issues with my truck, they took it in right away and diagnosed it within a couple of hours of me dropping it off. Denise called me to explain what the issue was, and gave me the time to process the cost of my repair. The job was quoted to take a few days, as they had scheduled some work on other vehicles ahead of mine. They got it done faster then I expected. Great service, polite and friendly staff, that make you feel a part of their family. 1000% would go back to them.
Date: April 25, 2023
Website: Google
Literally so good I didn't...
Stratton Findlay
Literally so good I didn't even need to go. My issue was to do with the shifter cable, but my car is so old they don't make replacement parts for it anymore. Just one phone call and the guy I talked to gave me the information I needed to do the fix myself. Turns out it wasn't even the cable, just a bolt I needed to replace. That being said, when I do have an issue that is beyond my capabilities, I can't wait to come in because I know I will get honest service.
Date: April 12, 2023
Website: Google
Outstanding customer service. Thanks Denise...
Alicia Marcia
Outstanding customer service. Thanks Denise for breaking the news to me so gently. :)
Date: February 6, 2023
Website: Google
I could not be happier...
David Traves
I could not be happier with the service that I received, this is a first class shop. When I took my sons car in they went above and beyond to help us out not only with the transmission but also the engine, what a fantastic group they have. I strongly recommend this shop to anybody with transmission issues I’m sure you will be very satisfied as was I. Right from Denise in front office to her husband Sean and and the crew in the shop you have my utmost thanks. Dave Traves
Date: January 27, 2023
Website: Google
Shawn and Denise and the...
Craig L.
Shawn and Denise and the whole crew are real down to earth folks. They give you all the info you need to make the right decision for your vehicle. It's not all about getting the job, they care! Very comfortable every time in what they tell me and the work they do. Thanks Guys. Craig Laing
Date: December 16, 2022
Website: Yelp
Very professional, very attentive and...
Sean Devereaux
Very professional, very attentive and quick. Most importantly they charge you what they tell you to expect. Hassle free service from Ken
Date: December 13, 2022
Website: Google
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