What Is Included in Your Transmissions Diagnostic Process?

January 30, 2026 | By Mister Transmission

Comprehensive Transmissions Diagnostic Evaluation

A professional transmissions diagnostic is the foundation of accurate transmission service and repair. At Mister Transmission London Dundas Street, the process begins with a detailed review of your vehicle’s symptoms, including slipping, delayed shifting, dashboard warning lights, unusual noises, or loss of acceleration. This step helps narrow down potential issues before deeper inspection begins.

Visual Inspection and Transmission Fluid Analysis

As part of a complete transmissions diagnostic, technicians perform a hands-on inspection of the transmission system. This includes checking for fluid leaks, damaged seals, worn components, and loose connections. Transmission fluid is analyzed for level, color, and odor, as burnt or contaminated fluid often signals internal wear or overheating that requires attention.

Advanced Computerized Transmissions Diagnostic Testing

Modern vehicles rely heavily on electronic controls. Using advanced diagnostic tools, Mister Transmission London Dundas Street scans for fault codes related to automatic transmission, manual transmission, and control system performance. These scans help identify sensor failures, solenoid issues, or electronic communication problems affecting shifting behavior.

Road Testing and Performance Verification

When needed, a controlled road test is performed to evaluate real-world operation. Technicians assess shifting smoothness, acceleration response, vibration, and transmission slipping under driving conditions.

Clear Results and Trusted Repair Recommendations

After completing the transmissions diagnostic, Mister Transmission London Dundas Street provides a clear explanation of findings and recommends the appropriate transmission repair or service—ensuring informed decisions and no unnecessary work.

Mister Transmission Team

The Mister Transmission team consists of certified transmission specialists with decades of combined experience in diagnosing, repairing, and maintaining automatic and manual transmissions.

With over 60 years of service across Canada, our experts provide trusted, accurate, and up-to-date automotive advice to help drivers make informed decisions about their vehicles.

Rating

(4.8/5 - 14,279 Reviews)

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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.

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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
Super impressed with the service...
Bobby Newton
Super impressed with the service provided by Peter. After going to a smaller transmission shop twice and never really addressing all of my vehicle issues. I decided to go to a larger chain. Peter seemed like he knew what he was doing from the get go. Truck is now running smooth. Definitely under promise over delivery. Highly recommend Peter
Date: April 16, 2026
Website: Google
Spencer was nice and looked...
Jarrett Hoben
Spencer was nice and looked at my car for free , told me my transmission wasn’t the problem very honest place
Date: February 3, 2026
Website: Google
I had an excellent experience...
Kenia (Ken)
I had an excellent experience with Mister Transmission and would absolutely recommend them. I originally took my car to a general mechanic who couldn’t find the issue and referred me to another transmission shop. That shop told me I would need a new transmission, with an estimated cost of $7,000–$9,000. After reading the great reviews, I decided to take my car here for a third opinion and to see if they could get me in sooner and am I ever glad I did! They quickly told me it didn’t seem like a transmission issue and offered to take a deeper look if I brought the car back as I had just quickly dropped in. When I did, they properly diagnosed the actual problem. It was such a relief to find out it wasn’t a transmission issue. Even though the repair wasn’t transmission-related, they were more than willing to fix it and were very upfront about my options. Peter, the owner, was incredibly kind and took the time to explain exactly what was wrong and how everything was connected. The service was honest, transparent, and completely stress-free. I’ll definitely be back and would trust them again without hesitation.
Date: December 16, 2025
Website: Google
I was there for a...
Peter Resko
I was there for a transmission service and I was very delighted with them. Professional people with knowledge.
Date: November 24, 2025
Website: Google
I brought my Nissan NV200...
Thames Valley
I brought my Nissan NV200 work van in, because I was having acceleration/power issues and what I thought was transmission issues. The owner Peter immediately recognized that I didn’t actually have transmission issues, it was in fact, a clogged catalytic converter rather than an CVT transmission issue. He then recommended me to the appropriate specialist that had me up and running again within an hour I was back to work! Super happy with the honest service and expertise.
Date: October 24, 2025
Website: Google
Good service and listens to...
Johnny1Leg
Good service and listens to the customer issues of their vehicle.
Date: September 4, 2025
Website: Google
Good service and listens to...
Johnny1Leg
Good service and listens to the customer issues of their vehicle.
Date: September 4, 2025
Website: Google
They listened to my concerns...
Scott Lupa
They listened to my concerns and preformed what I asked them to do. I was in and out in a few hours. Thank you. I would recommend them to anyone that needs transmission work.
Date: August 13, 2025
Website: Google
Brought my 2018 VW Passat...
GT
Brought my 2018 VW Passat in thinking I definitely had a transmission issue only to find out that it was something else. Spencer was excellent in explaining what was wrong with my car and couldn't be more friendly and offered to recommend places for the work to be done. I came away from Mr Transmission very impressed and would not hesitate to recommend them or bring my vehicle back again.
Date: July 17, 2025
Website: Google
Brought my 2018 VW Passat...
GT
Brought my 2018 VW Passat in thinking I definitely had a transmission issue only to find out that it was something else. Spencer was excellent in explaining what was wrong with my car and couldn't be more friendly and offered to recommend places for the work to be done. I came away from Mr Transmission very impressed and would not hesitate to recommend them or bring my vehicle back again.
Date: July 17, 2025
Website: Google
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