Pinion Bearing Washer

The Pinion Bearing Washer (MPN 5055) from Winters is a precision-engineered component designed for quick-change differential assemblies in high-performance racing and heavy-duty applications. This washer supports the pinion shaft bearing, distributing load evenly across the differential housing to maintain proper preload and alignment. Used by fabricators, off-road enthusiasts, and professional racing teams, the pinion bearing washer is essential for reliable gear operation and extended component lifespan in demanding environments.

Constructed from hardened steel in its natural finish, this washer features a 1.325 inch inner diameter and 2 inch outer diameter, engineered to exact tolerances for the Winters 10 inch quick-change differential system. The precise thickness and hardness of the steel prevent deformation under extreme pinion loads, maintaining critical bearing preload specifications that are vital for reducing noise, wear, and gear lash. The natural steel finish provides corrosion resistance suitable for both street and competition use, while the compact 0.4 inch profile ensures proper fit within tight differential assemblies.

This pinion bearing washer is ideal for anyone maintaining, rebuilding, or upgrading a Winters quick-change differential, particularly those running 10 inch housings in drag racing, circle track, or off-road competition. Proper washer selection is critical—using OEM-equivalent components ensures bearing preload remains within manufacturer specifications, preventing premature failure and maintaining differential performance. Installation requires careful attention to assembly sequence and torque specifications; always consult your differential's technical manual and consider professional assembly if unfamiliar with preload procedures.