Transmission Repair & Service Fergus, ON

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
Gary was fantastic to work...
Elijah Hiebert
Gary was fantastic to work with and had my truck fixed a lot faster than I expected. Definitely recommend Mr. Transmission for any transmission troubles you may have.
Date: September 22, 2025
Website: Google
Took my 2001 bmw to...
Thomas Lowles
Took my 2001 bmw to Mister Transmission for a shifting issue, Gary was great and easy to work with making an appointment. They communicated clearly with me on what they are working on the vehicle, quickly finding the issue. The part needed would have taken 4 weeks to arrive overseas so they fabricated a new one in-house to solve the issue! Highly recommend for any transmission issues to come here
Date: September 16, 2025
Website: Google
They did a great job...
Chris Bender
They did a great job and were very fast as well. I definitely recommend them.
Date: September 11, 2025
Website: Google
Gary and his team did...
Anne Facey
Gary and his team did amazing work on my car . I recommend this place . They are honest with the work and explained everything to me . If you need work on your transmission go here . I wish they had more stars I give them more stars instead of five stars .
Date: August 13, 2025
Website: Google
Reasonably priced and on time...
Nafis Hoq
Reasonably priced and on time service. Thanks Gary!
Date: July 25, 2025
Website: Google
Experience and knowledge in all...
Eduardo Gallon
Experience and knowledge in all aspects of transmissions, with fast turnaround time on repairs
Date: July 11, 2025
Website: Google
Great customer service, got in...
Marc S.
Great customer service, got in quicky, problem solved on time and on budget.
Date: July 8, 2025
Website: Google
Amazing price and great people,...
Thanh Mac
Amazing price and great people, they really help me with my Third party Warranty since most places don't deal with them.
Date: June 19, 2025
Website: Google
I have a 2018 Ford...
Rob Mackay
I have a 2018 Ford Ranger that had a transmission problem. My mechanic made several attempts to fix it and finally told me that he could send it our to a transmission specialitst and it would be approx $2,000. I took it to Gary and he fixed it the next day for much less. It is running beautifully!
Date: June 13, 2025
Website: Google
Came in after shifting in...
Austin Hawkins
Came in after shifting in our transmission seemed off. Gary the manager did an amazing job all the way from diagnosis to hand-off. He was knowledgeable and finished a complex job quickly and with expertise. Our destroyed transmission is now shifting better than ever.
Date: June 13, 2025
Website: Google
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