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.

Learn More
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Customer Reviews
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
Went to mister transmission to...
Dalton Lee
Went to mister transmission to get my vehicle diagnosed. They treated me like a regular customer. Some of the nicest service I've have had dealing with my vehicle. I will definetly be back if I have any more work need done.
Date: December 2, 2022
Website: Google
Bring back the old lifetime...
Terry Proctor
Bring back the old lifetime warranty
Date: September 23, 2022
Website: Google
Sean is amazing. Very sincere...
Patti Mckay
Sean is amazing. Very sincere and honest. I highly reccomend this location. I trust them 100%. Thank you.
Date: September 20, 2022
Website: Google
Professionals and do their job...
Khaled AbuMaali
Professionals and do their job right Just had my Altima checked and the issue wasn't clear so it was advised to open the transmission and figure out the issue, but the car model and milage wasn't worth fixing it
Date: September 4, 2022
Website: Google
Honest assessment and fair pricing...
Bradley Hutchinson
Honest assessment and fair pricing with amazing work! Husband & wife owners that really care about their customers and community they service!
Date: August 31, 2022
Website: Google
I brought in my car...
David W
I brought in my car to get my transmission fixed and they did a great job repairing it. Their prices are fair and they were very professional and friendly. Thank you very much Denise and Shawn and the rest of the team for providing terrific customer service.
Date: August 22, 2022
Website: Google
I am Very grateful for...
Rafael Canseco
I am Very grateful for the services provided by Mister Transmission in Whitby. My sons older bmw needed some transmission work. I told my son that it would probably very expensive to fix and you may need to scrap the car. Denise was so understanding and made sure that only what needed to be done was done. Glad to say that the car is running fine again. Thanks Denise and staff for your professionalism and honesty. You can trust Mr. trans whitby!
Date: August 7, 2022
Website: Google
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