Transmission Shops in Cornwall, ON

Find trusted transmission services in Cornwall. Compare prices, read reviews, and book online.

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Acrux Truck Tire & Road Service
Cornwall • ≈ 7 km
AC
373 Belfort Cres, Cornwall, ON K6H 0H4, Canada, Cornwall
★ 5.0
5 Google reviews
Response ≈ 30 min • $$ • Quotes free
Transmission Truck MechanicEngine Repair
📞 (514) 465-8085 • Free quote • Verified
Auto M.D.
Cornwall • ≈ 2 km
AU
926 Carleton St, Cornwall, ON K6H 6B9, Canada, Cornwall
★ 4.8
66 Google reviews
Response ≈ 37 min • $$$ • Quotes free
Transmission Auto MechanicAuto AC & Heating
📞 (613) 932-0832 • Free quote • Verified
Direct Muffler, Brake & Auto Service Inc.
Cornwall • ≈ 2 km
DI
1411 Rosemount Ave, Cornwall, ON K6J 3E5, Canada, Cornwall
★ 4.5
152 Google reviews
Response ≈ 26 min • $ • Quotes free
Transmission Brake ServicesSuspension & Steering
📞 (613) 938-9185 • Free quote • Verified
Best Deal Garage Inc.
Cornwall • ≈ 3 km
BE
633 Pitt St, Cornwall, ON K6J 3R8, Canada, Cornwall
★ 4.4
177 Google reviews
Response ≈ 45 min • $ • Quotes free
Transmission Auto MechanicEngine Repair
📞 (613) 936-9393 • Free quote • Verified
Take 5 Oil Change
Cornwall • ≈ 3 km
TA
1610 Brookdale Ave, Cornwall, ON K6J 4R1, Canada, Cornwall
★ 4.4
263 Google reviews
Response ≈ 40 min • $$$ • Quotes free
Transmission Oil Change & LubeBrake Services
📞 (613) 935-8004 • Free quote • Verified
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Cornwall customer reviews

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Verified Reviews for Transmission
★ ★ ★ ★ ★

“I called Auto MD Friday morning before labour day with a transmission problem. I was told that there would be little chance that I could get the vehicle looked at let alone repaired that day. They assured me that Tuesday morning they would be able to help me.
I called CAA and had the vehicle (2013 Silverado) towed to their shop at about 11:30 am. There were people coming and going at this very busy shop. I was thinking that Friday before the long weekend was not a good time to have vehicle problems.
The vehicle was stuck in reverse and wouldn't start or drive.
When the tow driver dropped it off the mechanic came out and went under behind the driver wheel and announced it was now in park so no need to chalk the wheels.
After speaking with them I figured I would be at he camp site until Tuesday. My wife and I went to the park for a picnic lunch and before we knew it the garage called to say the truck was ready for pickup.
I could hardly believe it. When I went to pay I was flabbergasted at the small amount of the invoice.
Thank you so much for making our Holliday weekend enjoyable and stress free.
Robert and Terry Spencer”

Terry Spencer • Transmission at Auto M.D., Cornwall
★ ★ ★ ★ ★

“I got a very good service and price. Very human people. I was able to get an appointment for the same day. There was some things that they noticed had to be changed and took the time to explain very clearly what it was and how much it would be.
Got a rough week before going and they made the unexpected easier to go through.
Thank you again for everything.”

Cindy Lauzon • Transmission at Best Deal Garage Inc., Cornwall
★ ★ ★ ★ ★

“Fast and friendly service, did a free cabin air filter check which I definitely needed to have replaced.”

Summer Rain • Transmission at Take 5 Oil Change, Cornwall
★ ★ ★ ★ ★

“Great experience from Donny and Yatin!! This was on May 29th (apologies for the delay). Donny was especially courteous and helpful - with an excellent communication style. Thank you again guys. I will be back!”

What Is • Transmission at Take 5 Oil Change, Cornwall
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Find a Best Transmission in Cornwall, ON

Need a reliable mechanic for Transmission in Cornwall? We've verified 5 local shops ready to help. Check their availability and get a quote instantly.

Common Causes of Transmission Failure

Low or contaminated transmission fluid from neglected maintenance
Overheating from towing heavy loads without a transmission cooler
Worn clutch discs and pressure plates in manual transmissions
Failed solenoids and valve body issues in automatic transmissions
Torque converter failure causing shuddering and overheating
Broken or worn synchronizers making manual shifting difficult

Warning Signs of Transmission Problems

Transmission slipping—engine revs high but the vehicle doesn't accelerate
Harsh, delayed, or jerky shifting between gears
Grinding or shaking sensation when shifting a manual transmission
Transmission fluid leaking (bright red or dark brown fluid)
Check Engine or Transmission Warning light illuminated
Burning smell indicating overheated transmission fluid

Transmission Services Available

Transmission Fluid Flush

Complete fluid exchange to restore clean, functional ATF

Clutch Replacement

Replacing worn clutch disc, pressure plate, and throw-out bearing

Transmission Rebuild

Full teardown, parts replacement, and reassembly

Valve Body Repair

Fixing shift solenoids and hydraulic control circuits

Torque Converter Replacement

Replacing the failed fluid coupling unit

Transmission Replacement

Installing a remanufactured or used replacement unit

Transmission Tips

Check your transmission fluid level and condition monthly—it should be bright red and not smell burnt
Follow the manufacturer's recommended transmission fluid change intervals (usually every 60,000-100,000 km)
Come to a complete stop before shifting between Drive and Reverse
If you tow frequently, install an auxiliary transmission cooler to prevent overheating
Address a minor fluid leak immediately before it causes internal damage
For manual transmissions, don't ride the clutch pedal in traffic—it causes premature wear

Frequently Asked Questions

How much does a transmission rebuild cost in Cornwall? +
A complete automatic transmission rebuild typically costs $2,500-$5,000 for most vehicles. High-performance or European vehicles can cost $5,000-$8,000+. Manual transmission rebuilds are usually $1,500-$3,000.
How do I know if my transmission needs rebuilding vs. repair? +
If the issue is a single component like a solenoid or sensor, a targeted repair may suffice ($300-$800). If you have slipping, multiple fault codes, and burnt fluid, a full rebuild is usually necessary.
How long does a transmission rebuild take? +
Most transmission rebuilds take 3 to 5 business days. Complex units like CVTs or dual-clutch transmissions may take longer depending on parts availability.
Is a transmission flush safe for my vehicle? +
Yes, when performed correctly by a professional using the proper fluid. However, if your fluid is severely burnt and the transmission is already failing, a flush alone won't fix the underlying mechanical damage.