Timken Differential Pinion Race P/N:NP101912

Give the drive pinion's tapered bearing a hardened surface to spin against with the Timken Differential Pinion Race NP101912. It installs as a direct-fit replacement in the rear inner pinion position of the differential on the 1997-2002 Chevrolet Corvette, seating the outer raceway that the pinion bearing's rollers ride on.

A pinion race is the cup pressed into the differential housing; paired with its bearing, it locates and supports the drive pinion as it transfers power to the ring gear.

• Position: Rear inner pinion bearing race (cup).
• Function: Provides the hardened outer raceway the pinion bearing's rollers run against, helping locate and support the drive pinion.
• Press-fit design: Drives into the differential housing bore; it is not bolted in.
• Best practice: Replace the race together with its matching pinion bearing for even wear and proper preload.

Signs this race may need replacing include a howl or whine from the rear differential that changes with load, or roughness and play felt at the pinion. If a worn or pitted pinion race is the cause of the noise, this replaces it—diagnose the differential first, since gear and setup issues can produce similar sounds.

Manufacturer part number NP101912.