Transmission Repair & Service Scarborough, 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.

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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
Always had amazing experiences here....
Paper Skies
Always had amazing experiences here. Great mechanics who don't let you leave without all the boxes checked
Date: June 8, 2023
Website: Google
Although it was an expensive...
Wing Chan
Although it was an expensive repair for my old work truck, but I do appreciate Ray and his team for kindness and considerate.
Date: June 2, 2023
Website: Google
Undeniably the best mechanic you...
Anjuman Bhuiyan
Undeniably the best mechanic you can visit, particularly if your car is having transmission issues. Ray and Gus are not only seasoned experts but incredibly honest as well. They will give you different options to resolve your issue in a timely manner. They also keep you in the loop on matters that save you money, ie. how you can get back money from a recall/class action lawsuit that you might not know about. They even have financing options. Mr. Transmission went the extra mile for me, thank you!
Date: June 2, 2023
Website: Google
Highly recommended. Ray and guz....
Jason Yang
Highly recommended. Ray and guz. Very professional and honest with their work. I drop off my 2018 ford f150 with a 10speed transmission for rebuild and it was nicely done. I got my truck back within a week waiting for parts from ford take the longest. truck drive like new again. Im Very happy. Thank you guys.
Date: May 4, 2023
Website: Google
I was very happy with...
Alston Lewis
I was very happy with your service GUS you are indeed a master of what you do Thank you again
Date: May 4, 2023
Website: Google
They gave excellent service, I’ve...
Jamol Melbourne
They gave excellent service, I’ve done business with Rays shop for a long time. Honest person.
Date: May 1, 2023
Website: Google
He is kind guy and...
Shahbaz Anwar
He is kind guy and did a good job for his clients and always supportive and helpful . And satisfy his clients .
Date: April 22, 2023
Website: Google
We are very happy that...
Lori H
We are very happy that we took our truck to you we got very good service and I would recommend all of my family and friends to go get there work done.
Date: March 13, 2023
Website: Google
Gus is awesome, he'll go...
Dexter Reyes
Gus is awesome, he'll go through it with you and made sure he covered everything you need to know. Highly recommended.
Date: February 8, 2023
Website: Google
Very satisfied with the work...
Balok
Very satisfied with the work done on my 2015 Ford F-250. During transmission service suggested absolutely necessary preventative measures to avoid potentially huge problems. Underside experienced more than normal degradation and corrosion and pan/bolts were replaced. Will be going back to have all the transmission lines replaced with new ones. Obviously knowledgeable and experienced, forthright and transparent with costs, these guys have some pride in what they do. They’re not cheap but also not unreasonable. I prefer paying a proper price to get good people to do the needed work. Thanks Ray and Gus! I’ll be back.
Date: December 30, 2022
Website: Google
Transmission Service
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