4.56 Dual Rear Wheel Posi Limited Slip Axle Assembly

The Zumbrota Drivetrain RAA435-1657D is a remanufactured axle assembly engineered for GM 3500 trucks from model years 1990-2000. This unit is designed with a 4.56 gear ratio, a Dual Rear Wheel (DRW) drive type, and a Wide Track configuration featuring a Posi Limited Slip Differential (LSD) for enhanced traction. Zumbrota Drivetrain prides itself on rebuilding axle assemblies to the highest quality standards. Each assembly undergoes a rigorous inspection process, starting with the axle tubes, which are checked for straightness and cracks, and straightened to OEM specifications. Internally, all components, including ring and pinions, gears, clutches, and carriers, are fully inspected and tested. To ensure reliability and longevity, all bearings, seals, crush sleeves, pinion nuts, and shims are replaced. Furthermore, the gears are meticulously inspected for optimal tooth contact patterns and set to the correct rolling torque using precise inch-pound measurements. Proper gear backlash is also established to guarantee adequate gear lubrication and quiet operation. Zumbrota employs an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary shot-enticed deep cleaning process on both internal and external parts, setting a benchmark for remanufactured axle assemblies. * 1990-2000 Chevrolet C3500 * 1990-2000 Chevrolet K3500 * 1990-2000 GMC C3500 * 1990-2000 GMC K3500