Boommar. Find Mechanics
Claim shop
BOOMMAR / ON / Cornwall / Transmission

Transmission Shops in Cornwall, ON

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

✓ Verified Shops ✓ Online Booking ✓ Real Reviews
Acrux Truck Tire & Road Service
Cornwall • ≈ 4 km
AC
Acrux Truck Tire & Road Service
373 Belfort Cres, Cornwall, ON K6H 0H4, Canada, Cornwall
★ 5.0
5 Google reviews
Response ≈ 55 min • $ • Quotes free
Transmission Truck MechanicEngine Repair
📞 (514) 465-8085 • Free quote • Verified
View Profile
Auto M.D.
Cornwall • ≈ 4 km
AU
Auto M.D.
926 Carleton St, Cornwall, ON K6H 6B9, Canada, Cornwall
★ 4.8
66 Google reviews
Response ≈ 45 min • $$$ • Quotes free
Transmission Auto MechanicAuto AC & Heating
📞 (613) 932-0832 • Free quote • Verified
View Profile
Direct Muffler, Brake & Auto Service Inc.
Cornwall • ≈ 10 km
DI
Direct Muffler, Brake & Auto Service Inc.
1411 Rosemount Ave, Cornwall, ON K6J 3E5, Canada, Cornwall
★ 4.5
152 Google reviews
Response ≈ 39 min • $ • Quotes free
Transmission Brake ServicesSuspension & Steering
📞 (613) 938-9185 • Free quote • Verified
View Profile
Best Deal Garage Inc.
Cornwall • ≈ 10 km
BE
Best Deal Garage Inc.
633 Pitt St, Cornwall, ON K6J 3R8, Canada, Cornwall
★ 4.4
177 Google reviews
Response ≈ 49 min • $ • Quotes free
Transmission Auto MechanicEngine Repair
📞 (613) 936-9393 • Free quote • Verified
View Profile
Take 5 Oil Change
Cornwall • ≈ 10 km
TA
Take 5 Oil Change
1610 Brookdale Ave, Cornwall, ON K6J 4R1, Canada, Cornwall
★ 4.4
263 Google reviews
Response ≈ 26 min • $ • Quotes free
Transmission Oil Change & LubeBrake Services
📞 (613) 935-8004 • Free quote • Verified
View Profile
Showing 5 mechanics • Load more
Online booking workflow

Cornwall bookings,
zero phone tag.

STEP 01
Search

Filter Cornwall shops by service, rating, distance, open now.

5 results • verified
STEP 02
Request Booking

Send vehicle + service details. Get a firm quote or pick a slot.

Avg reply 42m
STEP 03
Shop Approves

Owner confirms time, price, and bay availability. One tap.

Calendar & SMS sync
STEP 04
Appointment Confirmed

You get confirm + reminders + live status tracking.

Stripe receipts
Cornwall customer reviews

Real bookings, real reviews

Verified Reviews for Transmission
★ ★ ★ ★ ★

“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
★ ★ ★ ★ ★

“Very friendly and happy to help. Thanks for everything”

Sergio Didonato • Transmission at Auto M.D., Cornwall
★ ★ ★ ★ ★

“They did a P/S rack and pinion replacement, & fabricated a return line twice b/c of my clumsy driving lol. They gave it great service, honest pricing, and they knew what they're doing. What more do you need from a mechanic?”

Patrick A Parish • Transmission at Best Deal Garage Inc., Cornwall
★ ★ ★ ★ ★

“Best in town for years again and again”

Frank St. Pierre • Transmission at Take 5 Oil Change, Cornwall
For shop owners

Get More Customers
Through Boommar

Cornwall drivers searched “auto mechanic” 8,400 times last month. Claim your listing, turn searches into bookings.

• Online Booking
• Lead Tracking
• Review Management
• Listing Analytics
Claim Your Listing View Cornwall pricing
Cornwall Pro – last 30 days
+41
booking requests
4.8★
avg rating
31m
median reply
92%
show-up rate
Calendar sync • Stripe • SMS reminders • Review automation

Find a Best Transmission in Cornwall, ON

Boommar lists 5 verified mechanics in Cornwall. Compare real reviews, response times, pricing bands, and open bays — then book online.

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.

Transmission in Nearby Cities

Toronto Ottawa Mississauga Brampton Hamilton London Markham Vaughan

Other Services in Cornwall

Auto Mechanic Diesel Truck Mechanic Truck Mechanic Oil Change & Lube Brake Services Tires & Wheels Auto Detailing Auto Body & Paint

Popular Cities

Toronto Vancouver Calgary Edmonton Ottawa Winnipeg