Pinion Gear Replacement
WARNING: This page does not describe the selected car, but rather 124 other vehicles, including the 1991 Chevrolet Pickup, 1991 Chevrolet Cab & Chassis, 1988 GMC Vandura Special, 1988 GMC Vandura, and 1988 GMC Value Van. However, it is still accessible from the selected car via links, so may be relevant.
- Support carrier assembly on front face. To avoid damage to carrier when removing pin, use a 1/2" drill bit and remove stake marks from end of pin. DO NOT remove any material from carrier as it will weaken and possibly crack.
- Using a tapered punch, remove pinion pins from carrier. Remove pinion gears, thrust washers and roller needle bearings. Check pinion pocket thrust faces for burrs.
- Install 18 needle bearings into each pinion. Use pinion pin as guide and petroleum jelly to hold bearings in place. Place a bronze and steel washer on each side of pinion so steel washer is against pinion.
- Place pinion gear assembly in carrier. Install pilot shaft through rear face of assembly to hold parts in place. Drive in new pinion pin from front while rotating pinion gear.
- Ensure headed end is flush or below face of carrier. Use punch held in bench vise for an anvil. Place carrier over punch and stake pinion pin in 3 places with blunt radius chisel.
NOTE:
Both ends of pinion pin must lie below face of carrier or interference may occur.