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.

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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
Erice is a very honest...
Donovan Watson
Erice is a very honest Owner he help me step by step with my vehicle he will let you know what's wrong with your vehicle the best quality parts I'm very satisfied with his services the best place in the Niagara region if you're have trouble with your transmission or any problems with your vehicle he will help you out 💯
Date: April 18, 2024
Website: Google
I was told to bring...
Brett S
I was told to bring my car to Mr. Transmission and they did not disappoint! The initial call was very enjoyable as they fully explained what the process will be and answered all of my questions. Even better was the quick turn around, my car was fixed and back into my hands a day later. Really great business, great staff, and I couldn't be more pleased.
Date: April 3, 2024
Website: Google
Gord Clearly explained the issues...
John Simpson
Gord Clearly explained the issues with my mother in laws vehicle to her and me. Repair was done on time and on quote. Great job guys!!
Date: February 28, 2024
Website: Google
Great service and great price....
Jaymin Ferreira
Great service and great price. They weren’t able to look at my truck until the following week when I was away. They stored it for over a week and kept it inside during the snow. Appreciate it
Date: January 31, 2024
Website: Google
I've used these guys a...
Stu Boyd
I've used these guys a few times before and it's always great service. Things happen exactly as they say. I know it's not always possible to be exact with quotes, but so far, my experience has always been exactly as quoted, very impressive. I recommend Eric and his team!
Date: January 29, 2024
Website: Google
Awesome experience here. I had...
Steven Rodgers
Awesome experience here. I had been told to take my van here and was not disappointed. They inspected my van, found that the issue was actually not the transmission, made some recommendations on where to go, and did not charge me for the inspection. They did tell me there could still be a transmission issue, but the other issue needed to be corrected first. I appreciate them taking the time and making the recommendation for that work first and saving me a possible expensive transmission repair. If I need to come back I will!!!
Date: January 12, 2024
Website: Google
Company displays good technical skills,...
Courtney Morris
Company displays good technical skills, and experiences, very confident Techs. Front desk manager is a very good lister patient and gives very good professional advice. Highly recommended
Date: January 11, 2024
Website: Google
Absolutely fantastic organization - prompt,...
Lynda
Absolutely fantastic organization - prompt, accurate and professional. Completely trustworthy and honest - so thankful to find in automotive repair, particularly with transmission repair. They kept us informed throughout the diagnostic and repair stages. Thank you to all involved.
Date: January 5, 2024
Website: Google
Absolutely fantastic organization - prompt,...
Lynda
Absolutely fantastic organization - prompt, accurate and professional. Completely trustworthy and honest - so thankful to find in automotive repair, particularly with transmission repair. They kept us informed throughout the diagnostic and repair stages. Thank you to all involved.
Date: January 5, 2024
Website: Google
Absolutely fantastic organization - prompt,...
Lynda
Absolutely fantastic organization - prompt, accurate and professional. Completely trustworthy and honest - so thankful to find in automotive repair, particularly with transmission repair. They kept us informed throughout the diagnostic and repair stages. Thank you to all involved.
Date: January 5, 2024
Website: Google
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