Don's Garage Automotive and Transmission
Service · Denver

Transmission Rebuild, Repair & Service

It's in the shop name. We've been doing this since 1970.

Call (303) 295-2448

What this service is

Transmissions are what we built the shop on. Rebuilds, repairs, fluid services, transfer cases on four-wheel drive trucks, manual clutches and synchros, automatic valve bodies — all of it. Most shops at our size won't touch a rebuild anymore. We still do, because the right rebuild on the right vehicle saves you thousands and lasts as long as a remanufactured drop-in.

What's involved

  1. Road test plus computer scan to confirm the symptom
  2. Pan drop and inspection for clutch material in the fluid
  3. Honest call between rebuild, replacement, or simpler repair
  4. Full parts breakdown so you see what's in the quote
  5. Final road test, fluid change, and 30-day check-in

Wondering if this repair is worth it? Use our free repair-or-replace calculator for a math-based answer in under a minute.

Common signs you need it

If you're seeing any of these, bring it in.

Slipping — engine revs but the truck doesn't accelerate

Hard, late, or rough shifts

Burning smell, especially after towing or a long climb

Red or brown fluid on the driveway

Whining, humming, or buzzing that changes with speed

Won't go into gear, or jumps out of gear

Not sure if it's actually your transmission? Take our free 90-second diagnostic quiz first — most "transmission" symptoms turn out to be a CV joint, motor mount, torque converter, or just low fluid. Better to know before you authorize the wrong repair.

Considering a transmission rebuild? Read our consumer guide first — rebuild vs. remanufactured vs. used, what to ask any shop, and red flags to watch for. Fifteen minutes of reading can save you thousands.

What customers say

Reviews coming soon — check our Google profile in the meantime.

Bring it in. We'll tell you straight.

Real diagnostics, honest call between fix and replace, no sold work that doesn't need doing.

Call (303) 295-2448