Transmission Repair & Service Peterborough, 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
Reasonable price and friendly staff.
David Brown
Reasonable price and friendly staff.
Date: November 23, 2025
Website: Google
Great service!
Richie J
Great service!
Date: October 30, 2025
Website: Google
Thank you to Cam and...
Laura Montague
Thank you to Cam and his team for servicing my vehicle. Everyone was polite, welcoming and efficient. The waiting area was clean and the property was beautifully maintained.
Date: October 1, 2025
Website: Google
Had my 2017 GMC Canyon...
KEVIN MCCLYMONT
Had my 2017 GMC Canyon tow here from Lindsey drive-line, came highly recommend. My drive shaft rear yoke exploded on highway leaving my truck without a driveshaft as it was dislodged from the truck and the force cracked my tail shaft of transmission and damaged my rear yoke. Cam was able to source me a new drive shaft and tailshaft and I have to say this has got to be the most standup reputable shop I’ve come across and in in the trade. I highly recommend anyone with problems to go here and have their work done. Don’t get me wrong they are extremely busy but that cause the quality of work being done. Let them work and you will not be disappointed 5 extra stars can’t thank you again worth the travel from Richmond Hill ON TO GET GRADE A WORK DONE
Date: September 15, 2025
Website: Google
Absolutely fantastic crew! Honest and...
Darlene Winfield
Absolutely fantastic crew! Honest and professional.
Date: September 3, 2025
Website: Google
The guys at this Mr....
Jared Baker
The guys at this Mr. Transmission are amazing. They squeaked me in JUST before my warranty was up, and they went above and beyond to make sure as much of my repair fit under the warranty. They set me up with a rental, and kept me updated the whole process. Both Joe and Cam replied to my questions promptly and were as helpful as one could hope for. Hopefully I won't NEED their services again for a long time, but if I do, I'm definitely coming back. Thanks again guys.
Date: June 25, 2025
Website: Google
Mr.Transmission Peterborough is second to...
Ryan Pelman
Mr.Transmission Peterborough is second to no none. After multiple quotes they won with the lowest cost to repair. DO NOT bother with dealers or a standard auto mechanic. Your transmission is is complex....and these guy's are working solely on them every day. There's a huge margin for error, which means bigger problems and more money. Do yourself a favor, call Mr. Transmission Peterborough for your fix people.
Date: June 3, 2025
Website: Google
I have taken all my...
Soo Chung
I have taken all my vehicles here for transmission and axle repairs and service for several years now. The staff are pleasant to deal with and they have always delivered what they promise. Had a small issue with my truck and they were very accommodating. Got me in and on the road quickly. I would give 4.5 stars and recommend Mr Transmission for any transmission repairs or service.
Date: May 30, 2025
Website: Google
Great people to work with....
Lori Lewins
Great people to work with. Gave a quote for a tranny flush, which i did not need, ran a diagnostic. Turns out a had packed mud under my skid plate, they cleaned it all out and only charged me for the diagnostic.
Date: May 9, 2025
Website: Google
I would highly recommend them....
Ann Paterson
I would highly recommend them. They were amazing to work with and went over and above to help solve my problem.. Thank you.
Date: May 2, 2025
Website: Google
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