Transmission Repair & Service St. Mary’s, ON

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
I recently brought in my...
Isaiah Richards
I recently brought in my 2019 Ford Escape and I was really worried about what issues I was having with my vehicle, when I met with Gary he was seriously a tremendous amount of help and went the extra mile to help me out and explain everything in detail step by step you can tell when speaking with him that he really takes pride in the work he does , he kept in touch with me throughout the week as well while working on the repair, I know people can be skeptical about getting their transmission fixed especially with the price but you can’t go wrong here I was really pleased with my experience and the final result. Thank you!
Date: April 5, 2024
Website: Google
Fantastic experience all around! Gary,...
Stephen Gartshore
Fantastic experience all around! Gary, the gentleman who worked with me, was very transparent and forthcoming about every aspect of repair my car needed, and the turnaround time between dropping my car off and getting it back was just over 24 hours. Fingers crossed my car doesn't need any more maintenance done to it for awhile, but if and when it does I will definitely come back to this location!
Date: April 2, 2024
Website: Google
I’ve had my Tacoma in...
Kevin Green
I’ve had my Tacoma in here a few times - a few years back they were able to fix leaking lines without charging me for a full aftermarket set. And today Gary diagnosed my ailing transmission and had it fixed and ready to go same day! Really appreciate the honesty and personal service. Gary even called me a few times to update me on what he was finding. This is a place you can trust.
Date: March 28, 2024
Website: Google
Got me in quickly to...
Kevin Green
Got me in quickly to check my leaking transmission-was only the cooler lines-first diagnosis was free, and repair was less than $400….awesome service! Thanks!
Date: March 28, 2024
Website: Google
Gary was so helpful and...
Monica
Gary was so helpful and honest! He helped me out big time, and even when his services wouldn't fulfill what I needed done, he suggested a reputable local shop to get my car sorted out.
Date: January 9, 2024
Website: Google
Gary was so helpful and...
Monica
Gary was so helpful and honest! He helped me out big time, and even when his services wouldn't fulfill what I needed done, he suggested a reputable local shop to get my car sorted out.
Date: January 9, 2024
Website: Google
Gary was so helpful and...
Monica
Gary was so helpful and honest! He helped me out big time, and even when his services wouldn't fulfill what I needed done, he suggested a reputable local shop to get my car sorted out.
Date: January 9, 2024
Website: Google
Gary was so helpful and...
Monica
Gary was so helpful and honest! He helped me out big time, and even when his services wouldn't fulfill what I needed done, he suggested a reputable local shop to get my car sorted out.
Date: January 9, 2024
Website: Google
I brought my car into...
Tim Eggett
I brought my car into Gary's shop on a Thursday. Gary took my car in right away and test drove to help diagnose the problem. The clutch was ready to go and did on the test drive. He told me he could get it in the following week to change the clutch. Gary and his team exceeded my expectations by having the repairs completed the next day and for the cost quoted. Thank you very much for your knowledgeable and great customer service.
Date: December 19, 2023
Website: Google
Great straight forward service and...
Rod Smith
Great straight forward service and definitely trustworthy. My situation was waiting for warranty service to make decisions while Gary kept updating me.
Date: December 4, 2023
Website: Google
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