Mwe/Strange Pinion Bearing - Rear Bearing

The RATECH Pinion Bearing HM804846 is a precision rear bearing assembly engineered for Ford 9-inch differential applications. This large-diameter pinion support bearing features a 3.750-inch outer diameter and 1.875-inch inner diameter, providing the load capacity and durability required for heavy-duty axle duty in both street and racing environments. Manufactured from steel and designed to OEM specifications, this bearing ensures proper pinion alignment and supports the high rotational forces generated during acceleration, braking, and cornering.

The rear bearing's dimensional specifications—3.750-inch outer diameter and 1.875-inch inner diameter—are critical to maintaining the tight tolerances that prevent pinion runout and bearing preload issues. Improper or worn pinion bearings introduce play in the differential assembly, leading to noise, vibration, and accelerated wear of both the bearing races and gear teeth. As a replacement component, this bearing restores factory specifications and eliminates the slop that develops over time, especially in high-mileage or heavily loaded differentials. The steel construction withstands the continuous stress cycles typical of daily driving, towing, and performance applications.

This bearing is essential for anyone rebuilding or servicing a Ford 9-inch differential—the industry standard for muscle cars, street rods, trucks, and racing platforms. Whether addressing worn bearings discovered during differential disassembly or performing preventive maintenance before installation of new gears, this RATECH component is sold individually and should be paired with the front pinion bearing, seals, and appropriate lubricant for a complete rebuild. Proper bearing selection and installation preserve differential geometry and extend the service life of the entire drivetrain assembly.