Transmission Repair & Service St Catharines, 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
Eric is very helpful and...
Owen Smith
Eric is very helpful and knowledgeable. Great team.
Date: November 28, 2022
Website: Google
Fast, friendly service. Tested my...
M N
Fast, friendly service. Tested my transmission for free and did not charge me for a diagnostic. Thank you
Date: November 2, 2022
Website: Google
Good service. Eric and his...
George Faulkner
Good service. Eric and his crew are very nice. Eric is trusting and he takes the time to explain things to you about your transmission. I would recommend them to anybody l know.
Date: August 19, 2022
Website: Google
Eric and his guys do...
P Vilas
Eric and his guys do a fantastic job! I had my truck in there and they were honest and a great price.
Date: July 28, 2022
Website: Google
A true “five stars” service...
Adnan Isakovic
A true “five stars” service by a professional Team of experts!Had intermittent transmission issues with my old SUV and previously tried to get help from the dealership, with no resolution - until I called Eric.Got immediate attention and effective service. Eric is passionate about his business and someone you can trust without reservations. You will get the best transmission job done for a fair price.Highly, highly recommended!
Date: June 23, 2022
Website: Google
I had my clutch replaced...
Alex
I had my clutch replaced here about a month or so ago. They offered the replacement at a fair price, completed the job in a timely manner. Car is shifting like new, clutch feels great.Would use their services again, no question.Thank you!Service: Transmission
Date: June 17, 2022
Website: Google
I had my clutch replaced...
Alex
I had my clutch replaced here about a month or so ago. They offered the replacement at a fair price, completed the job in a timely manner. Car is shifting like new, clutch feels great.Would use their services again, no question.Thank you!
Date: June 17, 2022
Website: Google
I had my clutch replaced...
Alex
I had my clutch replaced here about a month or so ago. They offered the replacement at a fair price, completed the job in a timely manner. Car is shifting like new, clutch feels great.Would use their services again, no question.Thank you!
Date: June 17, 2022
Website: Google
Very thorough and reliable
Anne Stark
Very thorough and reliable
Date: May 27, 2022
Website: Google
My transmission went and I...
Emily Klayre
My transmission went and I was a complete wreck over it as it's a pricey repair that i was not prepared for and quotes I got from other shops were very high. Other shops I called could only could replace my broken transmission with a used transmission and no warranty so I didn't want to risk paying thousands and a year down the road it happen again. Eric was great explaining the process to me of rebuilding my transmission (and that they have a warranty and a payment plan!!) and helped calm me down when I thought I was going to be without a vehicle and no way to get to work. Now my car has never driven so good from the day I bought it. I can't thank you enough Eric! And I appreciate all your help soso much! Would give 100 stars if I could!!
Date: April 23, 2022
Website: Google
Transmission Service
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