1. Karns Motor

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Knoxville, TN

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Karns Motor

5.0 (2 reviews)
Open • 8:00 am - 6:00 pm

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8 years ago

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Mr Cool's AC Transmission and Brake Service - Glad to help you!

Mr Cool's AC Transmission and Brake Service

(56 reviews)

I had a transmission fault and had my car towed to Mr. Cool's to get it diagnosed and fixed. They…read moregot me in incredibly quickly, were very kind, and were in-depth in explaining the problem. The repairs would have been more than the car was worth, so I declined them, and they were very understanding of me leaving the car there for a few days while I waited to tow it out. They did not charge for the diagnostics. I will be taking any future problems with my AC, transmission, or brakes here first.

Ok. I have a transmission issue…read more Brought it in to determine the root-cause. They found an old (not cleared) thermostat problem that I fixed a year ago. It didn't totally close, thus not allowing the Cat o get up to temperature quickly enough. I replaced for $25 and 45 minutes, easy. Check-engine light disappeared. But obviously the code locked in. And also they said I needed a full replacement transmission. Which I don't deny may be required. , sorta. I am 71 years old, done professional car work since 17. The ONLY reason I am not doing this myself is age. But that said, before I would tear down anything I would already know what component is bad. A valve, cam sensor, etc. My symptoms are of a valve-body stuck valve, causing the clutch(s) to not fully engage. Thus I wanted a more concise explanation for why I should give them $5,000 - $6,000 to replace the entire Xmission. I really should have had a talk with the trained mechanic that could go into depth about the detailed reason it is giving me problems. But I got the worker at the register explaining the estimate to me. I have 100% confidence she has ZERO true mechanical knowledge/training past what to say. She should have called the Tech to talk to me. Had that happened I would have set an appointment to have it replaced. But given the weak thermostat ($330) ghost diag, I had zero confidence about the rest of their work. Reminds me of "give a kid a hammer and everything looks like a nail".

Karns Motor - car_dealers - Updated October 2026

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