Transmission Repair & Service North York, 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 can recommend this place...
Jozef Gabor
I can recommend this place because they checked out my vehehicle free plus I liked the professional and honest team
Date: November 30, 2022
Website: Google
I came by yesterday, November...
Rafee Syed
I came by yesterday, November 14th with my 2017 Chevrolet Suburban which gave me issues that day and the day prior with regards to a slipping gear. I was unsure whether to goto GM again as they had just worked on it in June and I had trust issues regarding some other issues in my truck. Seeing the great reviews I decided to come here and was greeted by Jennifer, who was very nice and took all the requisite info. I ultimately did not get my servicing done here (I had a warranty with GM on the work done in June) but I will give 5 stars due to the honesty of this business. Jennifer called me after the free diagnosis and told me before they do anything, I should inquire regarding a warranty on the job done as it did not exceed 20,000km since the work was completed in June. She advised to go speak to GM and if there isn’t a warranty they will happily look at the truck. I had discussed earlier with my friend who had an issue with his vehicle that we have a hard time trusting most mechanics due to the many vultures we have come across. In my situation it would be easy for any mechanic to go ahead and make the buck off me, however Jennifer and their team are a gem in this industry and looked out for my best interest. I highly recommend them alone for their honesty and will recommend them to anyone of my friends who ever have an issue with their car. If I don’t have a warranty covering my truck I will for sure be back to Mister Transmission if there is a problem. Thank you Jennifer and the team!
Date: November 16, 2022
Website: Google
These guys did great work...
David Chan
These guys did great work on my 2015 Mazda 3. They were honest and transparent. Gyro Mazda told me I needed a new alternator, drive belt, water pump, battery and transmission and quoted me $9k for the repairs. Mr T rebuilt my transmission for $3k and determined that there was nothing wrong with the alternator, water pump or drive belt. Thanks Mister Transmission! You guys saved me $6k in phoney/unnecessary repairs.
Date: November 2, 2022
Website: Google
Very experienced in what they...
Janet Kagoda
Very experienced in what they do. Jennifer is especially very supportive and helpful in explaining everything and giving options and suggestions. Jennifer provides detailed information on every issue that my car had.
Date: September 29, 2022
Website: Google
Awesome service, Ken is the...
Michelle Menchion
Awesome service, Ken is the most honest mechanic you will ever meet.
Date: September 11, 2022
Website: Google
Jen and the entire crew...
Curt 360
Jen and the entire crew at Mr T were fantastic assisting me and my wife with our unplanned axle issues. Back on the road within 24 hours. Thanks everyone.
Date: July 19, 2022
Website: Google
Fantastic place! Staff so friendly...
Dave Nelson
Fantastic place! Staff so friendly I would work there!!
Date: June 24, 2022
Website: Google
I called this shop about...
Michael Cormier
I called this shop about 3 years ago when my 2010 Pontiac G5 needed a new clutch , I spoke with Jason and his price quote was $500.less than any of the other transmission repair shops I had called for quotes . The turnaround was quick and the repair was done for the quoted price and within the time they said it would take , I was extremely pleased ! When my check engine light came on last night and the cars engine power was reduced I called the shop this morning (Friday of a long weekend) and spoke with Jen , they were able to do a diagnostic test and reset , I got my car back within 3 hours when I asked how much they said no charge ! these guys and gals are the best and very trustworthy ! 10 out of 10 stars , Mike in Toronto
Date: May 21, 2022
Website: Google
I had the absolute best...
Daan Carels
I had the absolute best service and experience from the owner and staff of this location. They actually diagnosed my car issue accurately after i paid Canadian Tire to do their “diagnostic” which was wrong. I highly recommend Mister Transmission O’Conner for all your transmission and differential issues, problems and services. Thanks team!
Date: April 27, 2022
Website: Google
Fair price good service friendly...
Larry Downey
Fair price good service friendly service knows his stuff
Date: April 19, 2022
Website: Google
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