Master Install Kit 8.5in w/Eaton or Auburn Unit

The Motive Gear Master Install Kit for 8.5-inch Eaton or Auburn differentials is a complete bearing and seal refresh assembly designed for technicians and serious enthusiasts performing differential maintenance and repair on GM 10-bolt platforms. This kit consolidates all critical wear components—bearings, crush sleeve, gaskets, seals, shims, hardware, and thread locker—into a single verified package, eliminating guesswork and reducing downtime on shop floors and field operations where precision drivetrain work is non-negotiable.

Differential overhaul requires exact components matched to bearing preload specifications and seal compatibility. The Master Install Kit consolidates OEM-equivalent bearing sets, factory-grade gasket material, and precision shims to restore proper carrier bearing clearance and axle endplay within manufacturer tolerance. The crush sleeve manages preload application without guesswork, while included thread locker ensures fastener security under continuous duty cycles. At 5.65 lbs with dimensions of 11.1 × 1.8 × 11.7 inches, the kit fits standard shipping and storage while containing everything needed for a complete differential refresh.

This kit serves fleet technicians, transmission shops, off-road rebuilds, and truck owners tackling drivetrain work on 8.5-inch GM 10-bolt differentials—the platform found across pickup trucks, SUVs, and light-duty commercial platforms. Whether addressing bearing noise, restoring carrier preload after extended service, or performing preventive maintenance on high-mileage vehicles, the complete component set eliminates the risk of missing hardware or incompatible seals that compromise differential longevity. Eaton and Auburn differential housings use identical internal geometry on the 8.5-inch platform, making this kit compatible across both OEM and aftermarket carrier designs.