Transmission Repair & Service Barrie, 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
It is a breath of...
Valerie Lauzon
It is a breath of fresh air to have had a mechanic who has integrity. I went in with a concern and I was reassured that my car was fine. Thank you so much!
Date: May 15, 2024
Website: Google
Had a leak from the...
Bobros1944 Roz
Had a leak from the pan and front seal on my transmission. Despite being busy these guys were able to seal up the pan within one day. No leaks from the pan. I decided to hold off on the main seal as it is a slow leak and I'll deal with it in the winter when the cars in storage. Thanks
Date: May 9, 2024
Website: Google
The best service I’ve had...
Andrew Sengsavang
The best service I’ve had for a car. Jason was really helpful and transparent. Highly recommend.
Date: April 24, 2024
Website: Google
Jason as the first voice...
Cathy Gellegan-Colby
Jason as the first voice you hear when you call Mr Transmission was friendly and helpful. The personal interaction with him was refreshing and he was so welcoming. He was efficient and knowledgeable and explained what they would do to help us figure out why my van was so loud. Within 6 hours, we got my van back sounding better and was given a list of what else my van needed to get done at our regular mechanics. Thank you to Jason and the crew at Mr Transmission Essa Road for the great service!
Date: April 23, 2024
Website: Google
Even though Jason couldn't help...
Kimberley McLean
Even though Jason couldn't help with my issue as it was electrical not mechanical, I really appreciate him giving his input and attempting to diagnose the issue for me
Date: April 22, 2024
Website: Google
I highly recommend Mister Transmission!...
Arlene M.
I highly recommend Mister Transmission! Jason gave excellent customer service! very satisfied with everything!
Date: March 28, 2024
Website: Yelp
Thank you for the great...
Linda Jones
Thank you for the great service we received at Mister Transmission in Barrie. It was exceptional. They made sure the vehicle was at 100% before they let us pick it up. I would recommend them to anyone that needs transmission repairs. All the employees were pleasant and made you feel important. If you had any questions they answered them right away. Great job everyone. Ted and Linda Jones.
Date: March 14, 2024
Website: Google
Outstanding service. Professional, honest and...
Richard Woehl
Outstanding service. Professional, honest and courteous. I believed I was in for a major expense for my F 150. Lorenzo diagnosed the issue while we were driving home to drop me off. It ended up being a cracked vacuum hose. The same afternoon he called me and said my truck was ready to go. When I asked about the cost of the repair, his response was don't worry about it. NO CHARGE!! Unbelievable in this day. Most of the " big boys" would be reaching for your wallet. Would highly recommend this business.
Date: February 16, 2024
Website: Google
Brought my truck in to...
Lucas Faria
Brought my truck in to diagnose a faulty torque converter. After running a full diagnostic no issues were found and they sent me on my way without paying a dollar. Top notch stuff, would recommend!
Date: January 12, 2024
Website: Google
So I just purchased a...
Doug Baumken
So I just purchased a 2015 Evoque . There was nothing wrong with the trans , I just wanted to do any required maintence . The manager told me that Range Rover does not recomend any fluid change . Now he could have told me that , YES he could change the filter and fluid and bill me $500.00 plus , but he did'nt , he told me the truth , which I might add does not happen to often anymore . I highly recommend this business , and it's not hard to understand the reason why they have been in business so long . Thank You -SIR, for your honesty
Date: November 17, 2023
Website: Google
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