Don's Garage Automotive and Transmission
Service · Denver

Differential Service & Repair

On a four-wheel drive, this is the part nobody thinks about until it fails.

Call (303) 295-2448

What this service is

Differentials and transfer cases get ignored until they make noise. By then it's usually expensive. Service intervals exist for a reason — fluid breaks down, especially on trucks that tow or see real off-road use. We service front diffs, rear diffs, transfer cases, and limited-slip units.

What's involved

  1. Drain and inspect fluid for metal shavings
  2. Pinion seal and case inspection for leaks
  3. Refill with the correct fluid spec for your vehicle
  4. Limited-slip additive if required
  5. Road test at the speeds where the symptom shows up

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.

Whining or humming that changes with speed (not RPM)

Clunking when shifting from park to drive

Vibration that gets worse the faster you go

Leaking gear oil — heavy, dark, sweet smell

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