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
I have come to Sheppard...
A Grant
I have come to Sheppard location quite a few times and they have done the job amazing each time: I have had transmission problems for years and they gave me the best deal and my car is perfect now! Highly recommend
Date: February 28, 2024
Website: Google
Ray and Gus are my...
Peter Urbanski
Ray and Gus are my transmission guys from now on! Ray filled me in on any possible aspects of what can be wrong with my 1993 Lincoln TownCar He used to fix them (also Crown Vic's) back in the nineties Then, he had changed the fluid as the first step It's been two months since then, and my Lincoln is smoother then ever! My point is, Any shop can change the transmission fluid, but most of them will tell you "You need a new transmission" Honesty and integrity, which we all long for Sorry Rayfor waiting two months to write this, but I had to make sure I don't "jump the gun" to praise you!
Date: January 30, 2024
Website: Google
Customer service was great, Gus...
Julian Hay
Customer service was great, Gus did a great job and was very understanding and helped get my car running again. would recommend
Date: January 12, 2024
Website: Google
My mechanic referred me to...
Jeremy Todd
My mechanic referred me to Mr Transmission. I dealt with Gus and Ray. What I liked was that they knew my vehicle. They had repaired lots of transmissions for my vehicle so I felt confident that they knew what they were doing. The repair was completed on time, at a lower cost then the dealer and they even did a transmission service. My vehicle runs great now and I am very happy. Gus and Ray were very pleasant to deal with. There is also an Enterprise car rental right next door (just walk over) and you'll get a special rate for being a Mr transmission customer. I would 100% recommend.
Date: December 23, 2023
Website: Google
They are the best! First...
Abdullah Al
They are the best! First time I went there for fixing my car's faulty transmission. They examined the issue, explained it to me and clearly communicated the cost and time beforehand. After they successfully rebuilt my transmission, I still drive my car smoothly without having any issue with it! Both Ray and Guss showed exceptional customer service and professionalism. After transmission fix, I went there several times for routine maintenance and for fixing other issues including electronics, brakes, starter etc. Even last time, when my car was not starting, Ray personally came to my garage (I live nearby) to have a quick look and helped me arranging a towing service. This shows how much they care about their customers and their thrives to go above and beyond! If I have any issue with my car, I would first contact with them without any hesitation!
Date: December 22, 2023
Website: Google
My car was all but...
Jessica Newhook
My car was all but written off by my mechanic due to what he determined to be a completely faulty transmission. I called Mr. Transmission and they assured me it would be highly unlikely that I needed a new transmission. I brought my car in, and received a quote for a fraction of the cost of what my mechanic had quoted me to fix the issue. Everything was done quickly and I was back on the road in a day. I am so grateful for Ray and his team.
Date: December 15, 2023
Website: Google
Excellent service , will recommend...
Reynaldo Bagsic
Excellent service , will recommend to anybody that need transmission fix or for general mechanic job .
Date: November 7, 2023
Website: Google
Needed to replace my clutch...
Mark Emery
Needed to replace my clutch and Ray was very helpful and informative. Thanks to the whole team for getting my car running like new.
Date: November 7, 2023
Website: Google
Not only did they do...
Adrian Bowers
Not only did they do a professional job, they got it done quicker than I hoped. And the staff were super kind and supportive. Thank you so much
Date: October 25, 2023
Website: Google
Great service. Thanks Ray and...
Lourenco Pereira
Great service. Thanks Ray and Gus.
Date: October 16, 2023
Website: Google
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