Differential repair and re-gearing in Denver.
Wizard Transmission diagnoses differential problems free and repairs them at a fair price, from a simple fluid change to a complete overhaul or re-gearing. Every differential repair carries a 2-year, 24,000-mile warranty and free annual maintenance for as long as you own the vehicle.
Signs of a differential problem.
If you notice any of these, have it checked before it does more damage:
- Whining or howling from underneath when you accelerate
- A whirring noise when you slow down
- A rumble you feel or hear when turning corners
- Odd vibrations while accelerating or turning
- Uneven wear on the tires
- Grinding gears
Three levels of repair.
Soft overhaul
Often all that's needed. The differential is overhauled with a complete bearing kit: shims, axle seals and bearings.
Complete overhaul
Everything in a soft overhaul plus a new ring and pinion gear set, and a carrier assembly and supporting parts if the job calls for them.
Re-gearing
For vehicles on oversized tires. A lower gear ratio takes excess load off the transmission and the rest of the driveline.
Warranty
2 years or 24,000 miles on every differential repair, plus free annual maintenance for as long as you own the vehicle.
Differential questions.
Updated October 2026.
- What does a differential do?
- It lets the wheels on an axle turn at different speeds. When you take a corner, the outside wheel has to travel farther than the inside one. A differential that isn't doing its job quickly causes trouble for the wheels, axles and transmission.
- Does a noisy differential always need a full rebuild?
- No. Caught early, it can be as simple as replacing the differential oil, and many jobs only need a soft overhaul with a new bearing kit. The free diagnostic tells you which one you're looking at.
- Why re-gear a truck with bigger tires?
- Oversized tires change the effective gear ratio and put extra load on the whole driveline. Re-gearing lowers the ratio to take that strain off the transmission. It's most common on diesels.
Bring it in, or have it towed in.
Call ahead and we'll plan for your vehicle. The diagnostic is free, and nothing gets fixed until you say so.
- Hours
- Monday to Friday, 7:00 am to 5:00 pm
Closed Saturday and Sunday - Phone
- 303-733-8494
- Towing
- Free in most cases within the Denver metro. Reduced rate from outside the city.