INSTALL KIT GM 8.6

The INSTALL KIT GM 8.6 from RATECH is purpose-built for mechanics and enthusiasts upgrading General Motors 8.6-inch rear differentials with high-performance bearings, seals, and internal components. This comprehensive kit eliminates the guesswork when performing differential rebuilds, providing all the precision hardware and gaskets necessary for a leak-free, durable installation. Whether you're refreshing a factory differential after years of wear or installing an upgraded gear set, this kit ensures proper torque retention and eliminates comebacks caused by incomplete fastener packages.

RATECH's install kit includes OEM-spec fasteners, crush sleeves, bearing shims, gasket material, and sealed components that meet GM's original engineering tolerances. The 6.51 lb kit is engineered to support both stock and aftermarket gear ratios, accommodating 3.42 through 4.56 gearing without modification. Fasteners are precision-grade and plated to resist corrosion in harsh driving conditions, while gasket materials are formulated to maintain integrity across temperature extremes and load cycles. Each component is sized and finished to prevent binding, noise, and premature wear—critical factors in rear axle longevity.

This kit is ideal for GM truck and SUV owners performing differential service, traction upgrades, or engine swaps requiring rear axle refresh. Compatibility spans Chevrolet, GMC, and Cadillac platforms equipped with the 8.6-inch differential, making it essential for both street and off-road builds. Professional mechanics rely on RATECH install kits to reduce labor time and minimize rework; the complete fastener assortment means no trips back to the parts counter mid-job. Proper installation using this kit preserves warranty coverage on upgraded components and ensures repeatable, reliable performance across thousands of miles.