Transmission Repair & Service London, 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
The staff was extremely knowledgeable...
Josh Whitbourn
The staff was extremely knowledgeable and helpful with any of my questions and made a very frustrating situation much easier to deal with!
Date: February 26, 2024
Website: Google
Had my clutch replaced here...
Tyler Foster
Had my clutch replaced here about 6 months ago in my wrx, was quoted 1500 less then the dealer wanted & less time, highly recommend checking these guys out, only complaint I had is my exhaust shield is a bit loose after the installation.
Date: February 6, 2024
Website: Google
I recently had an outstanding...
Maksim Ivanovskiy
I recently had an outstanding experience at Mister Transmission with my Ford Focus. The mechanics at Mister Transmission did a commendable job addressing issues with my car's differential and replacing the clutch. Peter, in particular, went above and beyond in providing exceptional customer service. He not only efficiently resolved the mechanical issues but also took the time to walk me through all the replaced parts, ensuring transparency and trust in their service. I highly recommend Mister Transmission for their professionalism, expertise, and commitment to customer satisfaction.
Date: January 28, 2024
Website: Google
Very good, polite and honest...
Sheldon Dias
Very good, polite and honest staff. And ofcourse experienced as well.
Date: December 21, 2023
Website: Google
My 2007 ford 150 when...
Joe Pieterman
My 2007 ford 150 when driving had a shutter do to a misfire. Peter and his team were able replace the two plugs and coils causing the misphire and got the truck running. He recommended changing all 8 plugs and any coils needed at a later date, preferably sooner rather than later. Peter he didn't have time that week to do all 8 so he did the two necessary to get the truck running well again and said he would have time the following week. Upfront, honest, fair price. Mr transmission is the place to go and if they can't help they'll recommend a reputable shop they feel best suits your needs. Thank you Mr transmission!!
Date: September 13, 2023
Website: Google
Did a great job, very...
Sabrina Hillen
Did a great job, very polite workers!
Date: September 12, 2023
Website: Google
Very courteous and helpful when...
Dan Stevens
Very courteous and helpful when I was in a tough situation.
Date: August 24, 2023
Website: Google
Such a great service! I...
Daniela Varela
Such a great service! I would recommend going to this place. Peter took the car and in matter of minutes give us a diagnostic. He explained what was going on- that it wasn’t the transmission. He very kind recommended another place that can help us and what we need it. Thank you very much Peter!
Date: August 16, 2023
Website: Google
The staff at mister transmission...
Priyavardhan Chittepureddy
The staff at mister transmission were friendly, approachable, and attentive. They patiently listened to my concerns, answered all my questions, and provided clear explanations of the repairs needed.
Date: May 12, 2023
Website: Google
I have an older Honda...
Doug Payne
I have an older Honda Accord, a model known for automatic transmission troubles. I shopped around, and found they could rebuild the transmission for a competitive price. I left it there, it took longer than estimated due to supply chain troubles, but in the end it was rebuilt and so far it looks like they did a good job. It seems to work quite well. I recommend this shop for transmission troubles.
Date: April 27, 2023
Website: Google
Transmission Service
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