Ford 8.8" 4.11 Ratio 28-Spline Posi LSD Rear Axle

The Zumbrota Drivetrain RAA435-1931D-P is a remanufactured complete axle assembly engineered for Ford 8.8" differentials. This unit is meticulously rebuilt to ensure precision and reliability, featuring a 4.11 gear ratio, 10-inch drum brakes, and a Posi Limited Slip Differential with a 28-spline count. Each axle assembly undergoes a rigorous inspection process for straightness, cracks, and surface wear. All internal components, including ring and pinions, internal gears, clutches, and carriers, are fully inspected and tested. Zumbrota Drivetrain prioritizes quality in their remanufacturing process. All bearings and seals are replaced with new components. The gears are inspected for optimal tooth contact patterns and set to the correct rolling torque using inch-pound measurements for precise setup and longevity. Proper gear backlash is established to ensure adequate lubrication and quiet operation. Furthermore, axle tubes are inspected to confirm they meet OEM standards for straightness. The remanufacturing process includes an exclusive hydro-blast rinse and sandblasting procedure for internal and external parts, followed by a proprietary shot-peening deep cleaning. This comprehensive approach sets a high standard for axle assembly remanufacturing, ensuring the housing is cleaned to an OEM finish, and all components are tested to stringent specifications.