If you tow, haul, or drive an AWD vehicle, the differentials and transfer case are working hard and their gear oil needs to be changed on schedule. Whining from the rear at speed or a clunk on takeoff are signs it's overdue. We drain, inspect the oil for metal, and refill with the correct weight and limited-slip additive where required.
Signs you need differential & transfer case service
- Whining from the rear at highway speed
- Clunk on takeoff or when shifting
- Fluid leak at the axle or pinion seal
- You tow or drive gravel regularly
- Past the interval
What we do on site
- Drain and inspect old fluid for metal or water
- Replace the cover gasket or drain plug crush washer
- Refill with the correct gear oil and friction modifier if limited-slip
- Check pinion and axle seals for leaks
Doing this in a driveway
Fully mobile.
Parts we use
Gear oil, limited-slip additive, cover gasket, plug washers.
Pricing: Inexpensive per unit; bundle front, rear, and transfer case for the best value. Every job is quoted in writing before we start, and there's no upsell — how our pricing works.
FAQ
Differential & Transfer Case Service: common questions
How often should I change differential fluid?
Every 30,000–50,000 miles if you tow; 60,000 otherwise. Check your manual — some AWD cars have shorter intervals than you'd expect.