Rearend Gear Install Kit GM 8.625in 98-08 2.891in

The RATECH Rearend Gear Install Kit for GM 8.625-inch differentials (Part Number 417K) is a comprehensive bearing and seal assembly designed for 1998–2008 GM 8.625-inch rear axles with 2.891-inch carrier bearing bores. This differential installation kit supplies the critical crush sleeve, gaskets, seals, and shims necessary to establish proper bearing preload and axle assembly alignment during rebuild or maintenance operations.

Proper bearing preload and seal installation are non-negotiable in differential service. The crush sleeve in this kit controls carrier bearing preload—excessive preload increases friction and heat generation; insufficient preload creates axial play that degrades handling and accelerates component wear. The gaskets and seals prevent fluid leakage and contamination ingress, maintaining lubrication integrity and extending service life. Shim selection ensures correct ring gear and pinion backlash, critical for smooth, quiet operation and even load distribution across gear teeth. This complete kit eliminates the need to source components individually, reducing assembly time and ensuring compatibility across all components.

Technicians rebuilding GM 8.625-inch differentials on light-duty trucks, SUVs, and van platforms depend on RATECH kits to restore OEM function and durability. This kit addresses the complete bearing and seal assembly for the 2.891-inch bore diameter, fitting GM 8.625-inch housings across Chevrolet, GMC, and other GM derivatives from 1998 through 2008 model years. Whether restoring a worn differential after high-mileage use or performing preventive maintenance, this installation kit supplies the consumable components that cannot be reused during disassembly.