Transmission Repair & Service Markham, 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
image-reviews image-reviews
Customer Reviews
Ken 非常专业,推荐!
David Shih
Ken 非常专业,推荐!
Date: April 30, 2025
Website: Google
This is a fantastic team...
Volodymyr Brykanov
This is a fantastic team of true professionals! Ken is not only a great person but also an incredibly knowledgeable mechanic. Highly recommend their services!
Date: April 15, 2025
Website: Google
I want to give Ken...
Dawei Guo
I want to give Ken 6 star for his help and kind words in comunicating that helped discover my problem.... I recommend Ken to anybody with automotive needs.... Thank you very much.... April 2 2025 David
Date: April 2, 2025
Website: Google
I went to see Ken...
Michael P
I went to see Ken Barone of Mister Transmission to replace the Solenoid in the Valve Body. It all started, when the dashboard in my 2016 Forester lit up like a holiday tree, the ATOil, incline assist, ABS, and other lights were flashing. There was a suggestion at another garage that I needed to replace the whole Valve Body, but Ken felt that replacing the Solenoid was all that was needed. Galo of Active Green & Ross at Steeles and Don Mills, had referred me to Mister Transmission who did a fantastic job of fixing my car.
Date: January 28, 2025
Website: Google
Very positive experience. Ken kept...
Karen Thomas
Very positive experience. Ken kept us regularly updated about what needed to be done (clutch replacement) and was totally upfront about pricing. Would thoroughly recommend!
Date: January 6, 2025
Website: Google
Thank you Ken repaired my...
Chak Fai
Thank you Ken repaired my Toyota Siena AWD noisy rear differential problem 👍👍👍
Date: January 4, 2025
Website: Google
Been taking my rides there...
William Wong
Been taking my rides there for about 20 years. Ken and team does amazing work, detail oriented and nice to talk to.
Date: December 31, 2024
Website: Google
After months of shelling out...
Johanna Keus
After months of shelling out so much money for other mechanics to "fix" my car- Ken immediately figured out what it was and had it fixed the next day! Friendly, amazing and prompt service!
Date: December 16, 2024
Website: Google
Great experience with Ken. He...
Tharanetharan Thuraiappa
Great experience with Ken. He came for a quick test drive and diagnosed it's not transmission and an engine issue. Highly recommended for any issues with transmission.
Date: November 7, 2024
Website: Google
Very Professional and Honest place.
Moris 87
Very Professional and Honest place.
Date: November 6, 2024
Website: Google
Mister Transmission Blogs
Recent Blogs
What Does A Transmission Flush Do? Is It...
A transmission flush is a professional service designed to remove old, degraded
Read More
May 31, 2025
Why Is My Car Not Shifting Gears Properl...
Have you noticed your car struggling to shift gears? Whether it hesitates, jerks, or
Read More
May 23, 2025
What Happens When Transmission Fluid Is ...
Transmission fluid plays a critical role in keeping a vehicle’s transmission system
Read More
May 15, 2025
Used Transmission Vs. Rebuilt Transmissi...
Choosing between a used transmission and a rebuilt transmission is an important
Read More
May 07, 2025
Preventative Transmission Maintenance: 5...
A vehicle's transmission is one of its most critical components, responsible for
Read More
April 30, 2025
Transmission Rebuild Vs. Replacement: Wh...
When a vehicle's transmission begins to fail, owners often face a crucial decision:
Read More
April 23, 2025
Transmission Overheating Causes: How To ...
Transmission overheating occurs when the system becomes too hot to function properly.
Read More
April 16, 2025
Signs Of A Failing Transmission Filter A...
The transmission filter plays a crucial role in keeping the transmission system clean
Read More
April 07, 2025
Manual Vs. Automatic Transmission Mainte...
Your vehicle’s transmission plays a crucial role in keeping your car running
Read More
March 31, 2025
How Much Does A New Transmission Cost? A...
A vehicle’s transmission is one of its most crucial components, responsible for
Read More
March 24, 2025