#55187C Rear Pin Bearing For 35-Spline Ultra Case

The #55187C Rear Pin Bearing For 35-Spline Ultra Case is a precision differential component engineered for high-performance drag racing, street racing, and extreme duty applications where conventional bearings fall short. Designed specifically for the Strange Engineering Ultra Case platform, this rear pinion bearing handles the lateral and thrust loads generated during aggressive acceleration, hard cornering, and sustained high-RPM operation. Whether you're building a competition differential or upgrading an existing setup, this bearing is essential for reliable power transfer and component longevity.

This bearing features a 4.380-inch outer diameter and 1.880-inch inner diameter, engineered to work seamlessly with 35-spline differential carriers and pinion gears. The steel construction delivers superior fatigue resistance and durability under extreme load cycles, critical for applications experiencing repeated shock loads and high torque multiplication. The precision bore and OD tolerances ensure proper fit within the Strange Ultra Case assembly, maintaining optimal gear mesh geometry and preventing premature wear. This specific design eliminates guesswork when replacing worn bearings—fitment is guaranteed for compatible Strange differential housings.

Performance builders, transmission shops, and serious drag racers rely on this component for differential rebuilds and upgrades targeting 9-second vehicles and beyond. Installation requires proper differential setup knowledge, as bearing preload and clearance specifications must be observed to prevent catastrophic failure. The 2.03-pound bearing integrates directly into Strange Ultra Case assemblies, making it an economical replacement for damaged OEM or aftermarket bearings. For anyone investing in a quality differential platform, using OEM-specification components like this rear pin bearing ensures maximum reliability and resale value.