Limited-Slip Differential Assembly

The Zumbrota Drivetrain RAA435-1981A-P is a remanufactured axle assembly specifically engineered for 1999-2000 Ford F-350 Super Duty models equipped with dual rear wheels and a Posi limited-slip differential. This assembly features a robust Ford 10.5-inch ring gear and a 3.73 gear ratio, designed to restore or enhance the performance of your truck's rear end. Zumbrota Drivetrain places a high emphasis on quality and reliability in their remanufacturing process. Each axle assembly is meticulously inspected for structural integrity, including checks for straightness, cracks, and surface wear. All internal components, such as ring and pinions, internal gears, clutches, and carriers, are thoroughly tested. To ensure longevity and optimal performance, all bearings and seals are replaced with new ones. The gear setup includes precise adjustment of tooth contact patterns and rolling torque, measured in inch-pounds, and correct gear backlash is set to guarantee proper lubrication and quiet operation. As part of their comprehensive remanufacturing process, Zumbrota employs an exclusive hydro-blast rinse and sandblasting procedure on both internal and external parts. This is followed by a proprietary shot-peening deep cleaning treatment, establishing a high standard for remanufactured axle assemblies. Key specifications include a 10.5-inch ring gear size for Ford applications, a 3.73 gear ratio, and a Posi Traction limited-slip differential. This particular assembly is for Dual Rear Wheels (DRW) and excludes Cab Chassis models. The axle type is Full Floating, and it includes the cover but does not include fluid.