Transmission Repair & Service Barrie, 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
Outstanding service. Professional, honest and...
Richard Woehl
Outstanding service. Professional, honest and courteous. I believed I was in for a major expense for my F 150. Lorenzo diagnosed the issue while we were driving home to drop me off. It ended up being a cracked vacuum hose. The same afternoon he called me and said my truck was ready to go. When I asked about the cost of the repair, his response was don't worry about it. NO CHARGE!! Unbelievable in this day. Most of the " big boys" would be reaching for your wallet. Would highly recommend this business.
Date: February 16, 2024
Website: Google
Brought my truck in to...
Lucas Faria
Brought my truck in to diagnose a faulty torque converter. After running a full diagnostic no issues were found and they sent me on my way without paying a dollar. Top notch stuff, would recommend!
Date: January 12, 2024
Website: Google
So I just purchased a...
Doug Baumken
So I just purchased a 2015 Evoque . There was nothing wrong with the trans , I just wanted to do any required maintence . The manager told me that Range Rover does not recomend any fluid change . Now he could have told me that , YES he could change the filter and fluid and bill me $500.00 plus , but he did'nt , he told me the truth , which I might add does not happen to often anymore . I highly recommend this business , and it's not hard to understand the reason why they have been in business so long . Thank You -SIR, for your honesty
Date: November 17, 2023
Website: Google
Fixed my work truck transmission...
Timothy Arthurs
Fixed my work truck transmission quickly, truck drives great and timeline was good. Got me back to work and the truck drives perfectly
Date: November 15, 2023
Website: Google
I had a really good...
Martin Mathew
I had a really good experience. My transmission had a minor issue and they didn’t charge me anything. Thank you so much. I will come back in the future for sure
Date: October 5, 2023
Website: Google
Transmission blew on the way...
Robert L.
Transmission blew on the way to the cottage. They replaced it within 24 hours! Can't ask for much more than that.
Date: August 14, 2023
Website: Yelp
Great service, great to work...
Jeff Storey-Finley
Great service, great to work with, overall awesome experience
Date: June 20, 2023
Website: Google
Nice and friendly owner. Very...
Liliana Gutierrez
Nice and friendly owner. Very professional.
Date: June 16, 2023
Website: Google
I apologize up front if...
Victoria Williams
I apologize up front if I get long winded. I want to be as objective as possible. There are different views on everything, depending which angle are you looking at it from. And of course on your eyesight and your positive or negative personality. I don’t want to canonize or put angel wings on Al but if anyone deserves it he would be on top or close to the top of the list. Honesty and determination [stubborn] are his trademarks. We are in our early 80’s. Our car broke down 450 km from home. Don’t read it wrong. It was 38 days of stressful, sleepless nights, as much for him as for us. At times on the verge of losing hope. BUT 38 days later we have our car running like a gold medal winner marathon runner. He never gave up on fixing it or on us, making sure we had a vehicle to get around. Hopefully we won't see him again in a customer capacity but a lot as friends. [any time we’re driving by Barrie] AND just to mention; at no time ever, were there any harsh words exchanged. The motto is: treat others as you would want to be treated. John and Victoria Williams Elliot Lake.
Date: June 10, 2023
Website: Google
Al at Mister Transmission is...
Trevor Cusolle
Al at Mister Transmission is a good man. Fair, honest service and got my car operational again.
Date: May 28, 2023
Website: Google
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