Mountain View Automotive
“They are very nice and want to help with anything they can”
Best Transmission Repair Shops in Thornton, CO
15 mechanics listed · 6 in Thornton · 5 open weekends · 14 rated 4.5+
Data verified October 16, 2026
Alternative Auto Care
“They are always friendly and good listeners when I explain my car's problem.”
Service Street Auto Repair
“These guys are amazing, it was very busy for them on Saturday and they were still somehow able to pull off a repair same day for me.”
G&G Automotive Services
“I wouldn't go anywhere else for repairs if you are in this area!”
Brake's Auto
“Matt was able to identify the issue quickly and explain what was going on!”
Bell Automotive LLC
“I have taken two foreign and domestic car there and was impressed with the courtesy and knowledge of my vehicles.”
Listed for drivers in and around Thornton, CO, these 15 shops work on transmissions. What each one says about rebuilds, warranty terms and the brands it handles comes from its own website; ratings and quotes come from public reviews.
Area overview: Thornton, CO
Of the 15 mechanics we list here, 6 are in Thornton itself and 9 come from towns including Broomfield (3, 6 mi), Denver (2, 11 mi) and Commerce City (1, 7 mi). The mechanics on this page are rated from 4.3 to 5.0 across 6,366 reviews; 12 have 50 or more reviews and 14 are rated 4.5 or higher. The topics that come up most in reviews of the mechanics on this page are "diagnosis", "price" and "communication". 5 are open on Saturdays. The services the mechanics on this page list most often on their websites are oil changes (4), brakes (3), brake services (2), diagnostics (2) and pre-purchase inspections (2). 9 list staff certifications (ASE) and 10 have a BBB rating of A or A+. 10 have ten or more years of experience, the longest 65 years. 1 offers emergency or roadside call-outs; 5 offer financing; 3 are family- or locally-owned and 7 list coupons or special offers. We have a website on file for 12 of the mechanics on this page; 10 publish a contact page; 4 list a public email and 3 take bookings online. We count these figures across the mechanics on this page; distances are straight-line, and hours and prices change, so confirm the details with the mechanic before you visit.
Do any shops listed for Thornton offer financing?
5 of the 15 shops on this page say they offer financing. Transmission work is one of the larger repair bills a car can hand you, so terms are worth reading closely before you sign anything at the counter.
Colorado Fleetworks
“After going back and forth with two different dealerships to fix an issue for 5 MONTHS with NO resolve, I came to Micky and his guys and was back on the road in less than a day!”
Accountable Auto Care
“Kept me in the loop on what work they were performing and what needs to be performed in the future.”
Salta Service & Performance
“He explained what might be wrong with the car, did a deeper dive, spoke with me about it, gave me some recommendations and options, and was never ever trying to push anything extra on me.”
AC Transmission Denver and General Auto Repair
“They got my Silverado back on the road again and driving like new, contact Chris he will take care of you!”
Fine Tuned Auto
“Very professional and kind to work with”
5th Gear Automotive
“And they do not mind taking the time to explain things to me about my car.”
Bending Wrenches Auto Repair
“I am always pleased with your service and honesty.”
Cooper's Automotive
“Great customer service, efficient and capable technicians!”
Westminster Auto Clinic
“They diagnosed another issue they recommended addressing, and when I agreed to go ahead with all repairs, they had the job completed in 24 hours.”
Why these companies made our list
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