Transmission Repair & Service Ajax, 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
Good work Mike.
Lunarticpickle
Good work Mike.
Date: January 24, 2025
Website: Google
Good work Mike.
Lunarticpickle
Good work Mike.
Date: January 24, 2025
Website: Google
Good work Mike.
Lunarticpickle
Good work Mike.
Date: January 24, 2025
Website: Google
Good work Mike.
Lunarticpickle
Good work Mike.
Date: January 24, 2025
Website: Google
Amazing service at 200 Fuller...
Candace Harris
Amazing service at 200 Fuller Rd. Honest and professional team. Free diagnostics was a nice bonus. 😊
Date: January 21, 2025
Website: Google
I recently brought my BMW...
Nilesh Surti
I recently brought my BMW X3 to Mister Transmission Ajax, and I’m thrilled with the service I received. They quickly diagnosed the issue and presented me with two options: refurbish the transmission or replace it. I chose the more cost-effective option to replace it, and they sourced a used transmission with only 17,000 km from British Columbia. The transmission arrived within 7 business days, and the team wasted no time getting my car in. In just about a day, they replaced the transmission, and my car now drives like new! I’ve been driving it for a week without any issues. The service was fantastic, the cost was very reasonable, and the whole process was smooth and stress-free. I highly recommend taking your vehicle to Mister Transmission Ajax for reliable and professional service.
Date: January 21, 2025
Website: Google
I had a great experience...
Asad
I had a great experience with this Mr Transmission location They were thorough in resolving any issues and maintained clear communication about the problem and pricing. Very respectful team. I would definitely recommend them.
Date: January 16, 2025
Website: Google
I had a great experience...
Asad
I had a great experience with this Mr Transmission location They were thorough in resolving any issues and maintained clear communication about the problem and pricing. Very respectful team. I would definitely recommend them.
Date: January 16, 2025
Website: Google
Bought a 2010 G37S coupe...
Harun Razvi
Bought a 2010 G37S coupe (automatic) in 2020 and had transmission issues since I got it. Brought it to mister transmission in ajax end of 2024 and they did some work, it felt much better but still not to my satisfaction. Took it back to them after 10 days for their checkup that they do and Mike said to bring it back in a month if the issues persist. Brought it back after 2 months (due to life) and he did a more rigorous relearn process (free of charge) for the transmission and now it feels almost brand new. Breathed the life back into this car it feels like a whole new machine. Mike is very knowledgeable and nice
Date: January 15, 2025
Website: Google
I recently visited this shop...
Yasmeen Sarhan
I recently visited this shop for quick maintenance on my vehicle. I was incredibly impressed with the level of professionalism and knowledge from the beginning. They are accommodating and transparent, allowing you to feel confident in their approach. I highly recommend this shop and will be revisiting for all future needs.
Date: January 14, 2025
Website: Google
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