Transmission Repair & Service Ajax, 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
Great staff especially Mike.....
Winfred Khan
Great staff especially Mike.....
Date: February 3, 2024
Website: Google
Great service. Flexible with time...
Fassel Hussain
Great service. Flexible with time and very generous with checking. My local mechanic had diagnosed a transmission/ CVT issue. I was able to call and speak to Rabih the same day and brought the car over. Mike spent some 10 to 15 minutes driving the car around to hear the reported noise. Nothing was found. He checked and cleared some other error codes in the car. No transmission error code was found. They did not charge anything. I took the car back, and the car started the noise and vibration again. I brought the car back, they put it on the hoist and checked all four wheels , spent some good 10 to 15 minutes looking at it and found the problem with exhaust hangers. Rabih also drove the car around for some 10 minutes. No transmission or axel issue was found. They refused to take money. I was shocked. I would have been happy to pay for the two checkups on two days. They say the check-up is free. Both Mike and Rabih were amazing!!! If I ever have a transmission issue or car key issue, I am going to this place.
Date: November 5, 2023
Website: Google
I recently had the pleasure...
Colin Marcelline
I recently had the pleasure of bringing my vehicle to Mr. Transmission at Unit 5, 200 Fuller Road, Ajax, Ontario, and I must say, the experience exceeded all my expectations. The Rabih Ghazale team at this location is a true gem in the world of auto repair. First and foremost, the service was incredibly fast and efficient. I was facing some rather concerning transmission problems, and they quickly diagnosed the issue, which was causing trouble with my front differential and axles. Not only did they promptly identify the problem, but they also took the time to thoroughly explain the issue to me, which made me feel at ease and confident in their expertise. One of the best things about Mr. Transmission was the transparency in their pricing. There were no surprises when it came to the repair cost. They provided a detailed breakdown of the expenses, and I was pleasantly surprised to see that they didn't overcharge for parts and labor. In fact, the final bill was exactly what we had initially discussed, which is a rare find in the world of auto repair. The team at Mr. Transmission in Ajax, Ontario, truly understands the importance of cost-effectiveness. They went above and beyond to provide a perfect solution for my vehicle's transmission issues without breaking the bank. I greatly appreciate their dedication to ensuring that the repair process was both effective and affordable. If you're experiencing transmission problems or facing issues with your front differential and axles, I wholeheartedly recommend Mr. Transmission at this location. They are an excellent service center that provides exceptional service, explains the problem thoroughly, and offers a cost-effective solution. I couldn't be more satisfied with my experience, and I'm confident you will be too. Mr. Transmission has earned my trust, and I will definitely be returning for any future automotive needs. Thank you, Rabih Ghazale team, for your outstanding service!
Date: October 26, 2023
Website: Google
Very good customer experience. Will...
Cheryl Ball
Very good customer experience. Will return, if necessary, for sure!!
Date: October 21, 2023
Website: Google
Friendly, knowledgeable staff that get...
Jeff Obornick
Friendly, knowledgeable staff that get the job done at a reasonable price. Def recommend!
Date: October 6, 2023
Website: Google
Went here for zf8hp45 transmission...
KevinZ
Went here for zf8hp45 transmission service on my bmw 535i. Owner and tech are super knowledgeable and very friendly. I was able to watch the service as it was being done. Excellent service! Also resolved issues I had with slight shuddering / slipping at WOT. I thought it was some boost pressure related but after the trans service the car feels great. Shifts like butter and super smooth. Highly recommend!!!
Date: July 6, 2023
Website: Google
Went here for zf8hp45 transmission...
KevinZ
Went here for zf8hp45 transmission service on my bmw 535i. Owner and tech are super knowledgeable and very friendly. I was able to watch the service as it was being done. Excellent service! Also resolved issues I had with slight shuddering / slipping at WOT. I thought it was some boost pressure related but after the trans service the car feels great. Shifts like butter and super smooth. Highly recommend!!!
Date: July 6, 2023
Website: Google
Went here for zf8hp45 transmission...
KevinZ
Went here for zf8hp45 transmission service on my bmw 535i. Owner and tech are super knowledgeable and very friendly. I was able to watch the service as it was being done. Excellent service! Also resolved issues I had with slight shuddering / slipping at WOT. I thought it was some boost pressure related but after the trans service the car feels great. Shifts like butter and super smooth. Highly recommend!!!
Date: July 6, 2023
Website: Google
I had what I thought...
PUTNAM
I had what I thought was a transmission problem and I was told they only need 15min to diagnose . With their code reader and professional experience it was explained to me that my problem was not related to the transmission. Thank you to Mister Transmission Ajax for their honest and professional diagnoses!
Date: June 13, 2023
Website: Google
I had what I thought...
PUTNAM
I had what I thought was a transmission problem and I was told they only need 15min to diagnose . With their code reader and professional experience it was explained to me that my problem was not related to the transmission. Thank you to Mister Transmission Ajax for their honest and professional diagnoses!
Date: June 13, 2023
Website: Google
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