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.

Mechanic carrepair starting carcar on the road issues


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.

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Customer Reviews
These days, among all the...
Tony D
These days, among all the horror stories you hear about auto shops who either don't know what they're doing or flat out make things worse (and charge mightily either way), it's easy to overlook the real gems who deliver over and above. This shop came highly recommended to me by my son's auto shop class teacher - this on top of the numerous and overall excellent Google reviews. I had transmission shifting problems with an old Dodge pickup truck with which they were initially unfamiliar, and not only did they take on the challenge, research possible causes, and effect what appeared to be logical repairs (at a *very* reasonable price, I might add), when those repairs turned out not to be the root cause of the problem they took it upon themselves to further track down and fix the problem without additional charge (drawing upon their networks of other contacts in the industry to do so). All in a timely manner, keeping well-appraised of their progress every step of the way. As a small business owner myself, I can say that you simply can not expect better service than this. If I could give more than 5 stars I would. Although this is my first experience with them, I will not go anywhere else in the future for transmission work on any vehicle I own.
Date: April 17, 2021
Website: Google
They brought our Honda back...
Daniel Connolly
They brought our Honda back to life within hours for the best price in town! Awesome service, excellent staff!
Date: April 17, 2021
Website: Google
Mister Transmission saved us! We...
Natasha Mohammed
Mister Transmission saved us! We had a sudden car issue and were taken care of by Raman. He quickly let us know how to get our vehicle to the shop and was very transparent about the process. He was up front with all costs beforehand and was very responsive, putting us immediately at ease. The fix was completed quickly and even before the estimated time given! We were super pleased with his professionalism, knowledge and workmanship. Car issues suck, but this was an excellent, pain free, no hassle, process. Highly recommend!Thank you Raman & Mister Transmission team!
Date: April 16, 2021
Website: Google
The owner went above and...
Lillian Mason
The owner went above and beyond to fix my car. So much so he called one of his employees back after they were closed to check another issue for me that was unrelated to my original issue. Amazing is all I can say
Date: April 16, 2021
Website: Google
Paul was the gentleman who...
Michael James
Paul was the gentleman who was taking care of my appointment. He was very informative with the issues I was having with my transmission. He was honest in giving his opinion on what course of repair I should use to fix my issue. His customer service and personability were exemplar. The repair was done in a timely manner and he even did some cleaning of the engine bay of my car without mentioning it. For any transmission or drive system repairs I wouldn't recommend any shop other than this one.
Date: April 15, 2021
Website: Google
Staff are super knowledgeable and...
Green Rhino
Staff are super knowledgeable and prices are fair with great explainations. Will definitely be back! Thanks Peter.
Date: April 14, 2021
Website: Google
Been here a couple times...
Jess O
Been here a couple times with a couple different vehicles. Fair price for the work needed, and the work is completed quickly. Knowledgeable and professional staff. Very honest about the severity and urgency of the issue, didn't try to make it seem like a bigger deal than it was.Very refreshing for this industry! Overall excellent experience and I highly recommend the Mister Transmission in Whitby!
Date: April 11, 2021
Website: Google
Nice people great service
Rob A
Nice people great service
Date: April 10, 2021
Website: Google
Chris has gone above and...
Kathy Kaun
Chris has gone above and beyond over and over for my vehicle and he stands behind his work. I can not recommend this place enough. I’d give them 100*
Date: April 9, 2021
Website: Google
Do not hesitate to get...
Derek Gibson
Do not hesitate to get Mr. Transmission to take a look at your vehicle. They will properly diagnose and fix your issues, with no hidden nonsense. Very straight shooters. Cam was great to deal with. They completely rebuilt my transmission, and I ran into a small issue later on. They took care of my issue under warranty, and it didn’t cost me a penny. Fantastic mechanics and customer service! We will be returning for any vehicle needs in the future.
Date: April 9, 2021
Website: Google
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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.

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