Transmission Repair & Service Whitby, 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 went to Mister Transmission...
Shanece Nestor
I went to Mister Transmission Whitby because my vehicle was showing signs that the transmission might be going. I honestly thought I was losing my transmission, but it turned out to just be a leak.From the beginning, the service was amazing. Denise who I spoke with over the phone was incredibly professional and so nice. She kept me updated throughout the process and made everything feel a lot less stressful.This was my first time going there, and my experience was honestly great. I was greeted kindly, and everyone was helpful and respectful.I would 100% recommend this place if you’re having transmission issues.Overall, it’s a solid place to take your vehicle. I’m really glad I chose them! P.S the recommendation came from Jiffy Lube.
Date: April 25, 2025
Website: Google
Quick and good service. It...
Jan Novada
Quick and good service. It costs an arm and a leg but I hope we saved the transmission which would've been multiple times the repair cost.
Date: April 1, 2025
Website: Google
Did exactly what they said...
Andrew Mackey
Did exactly what they said ,friendly service.
Date: March 21, 2025
Website: Google
Very nice and friendly people....
Leo Liu
Very nice and friendly people. I had very good experience with them. It was so helpful, inspecting and identifying the transmission problem of my car, giving me suggestions. Although it was not worth to replace the transmission of my car, in future if I need to fix my car problem, I will call them and go with mister transmission Whitby if they can do the job.
Date: March 1, 2025
Website: Google
I brought my wife's 2016...
Jordan Moore
I brought my wife's 2016 Nissan Juke in for service. Denise and her team were amazing! Fixed it quick, were completely up front and honest, and very professional! I would highly recommend Whitby Mister Transmission to anyone! Great job guys! And thank-you! Jordan Moore
Date: January 20, 2025
Website: Google
100% Recommend. Denise and her...
Aizlon Halliday
100% Recommend. Denise and her expert team are absolutely amazing. They were able to get my car in and fixed super quickly and gave me a complete explanation of what was done and why. They also have amazing partnerships with other service centers in the area and offer great recommendations if you need any towing or other assistance. Best customer service I have ever experienced, cannot rate high enough.
Date: January 16, 2025
Website: Google
Very good mechanics, super fast...
Eric Fitzgerald
Very good mechanics, super fast service! Had my clutch replaced. Kept me informed on what was happening and had it fixed very fast!
Date: January 14, 2025
Website: Google
I had a fantastic experience...
Wyatt Chilton
I had a fantastic experience here at Mister Transmission Whitby. Extremely helpful and great customer service!
Date: January 9, 2025
Website: Google
My wife and I would...
Dan Blomme
My wife and I would HIGHLY recommend bringing your vehicle to Mister Transmission Whitby for any transmission issues. We bought a used van with transmission issues which we brought to them and not only did they successfully address the issue - but when we experienced minor issues again about 11 months and 29 days later, they honoured their 1-year warranty without any hassles and the van has been fine since. Denise at the front desk is also affable and easy to work with. Thanks to her and the team at Mister Transmission.
Date: January 5, 2025
Website: Google
Awesome work on my Lincoln...
Luxe Auto
Awesome work on my Lincoln MKZ. Customer service is amazing and they’re straight to the point. Diagnosis was fast and booking the car in for the repair was a breeze. Thanks again. LUXE
Date: December 4, 2024
Website: Google
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