GM 8.6" Differential Assembly 3.73 Ratio w/ G80 Posi

The Zumbrota Drivetrain RAA435-222B-P is a remanufactured axle assembly engineered for specific GM vehicles. This unit is built around a GM 10-bolt, 8.6-inch ring gear and comes equipped with a 3.73 gear ratio and the G80 Posi Traction limited-slip differential. Zumbrota Drivetrain's remanufacturing process involves rigorous inspection and component replacement to ensure high standards of precision and reliability. Each axle assembly undergoes inspection for straightness, cracks, and surface wear. All internal components, including ring and pinions, internal gears, clutches, and carriers, are thoroughly inspected and tested. Crucially, all bearings, seals, crush sleeves, pinion nuts, and shims are replaced with new parts. The gears are meticulously inspected for optimal tooth contact patterns and correct rolling torque, with precise setup and longevity as key objectives. Gear backlash is carefully set to ensure proper lubrication and quiet operation, meeting OEM specifications. Further ensuring quality, Zumbrota Drivetrain employs an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary shot-peening deep cleaning process on internal and external parts. This advanced cleaning method sets a high standard for axle assembly remanufacturing and restores housings to an OEM finish. The company also inspects all axle tubes to guarantee they meet OEM standards for straightness. This specific axle assembly is designed for 2009-2010 Chevrolet Express 1500 and GMC Savana 1500 models. It is important to note that this assembly does not include hubs, brakes, backing plates, or axle shafts, and is manufactured without active brake control.