8.8 4.56 Ratio Duragrip Limited Slip Rear Axle Assembly

The Zumbrota RAA435-210X2-P ZPA-Rear Axle Assembly is engineered for the Ford 8.8 rearend found in 2009-2014 Ford F150 models. Featuring a 4.56 gear ratio and Duragrip limited-slip differential, this performance-grade assembly is designed to handle increased demands from larger tires, higher horsepower, and heavier towing or trailer loads, surpassing OE replacement capabilities. Each axle assembly is meticulously rebuilt to stringent quality standards. Zumbrota thoroughly inspects all components for straightness, cracks, and surface wear, replacing all bearings and seals. Internal parts, including ring and pinions, gears, clutches, and carriers, are fully inspected and tested. The gears are set up for optimal tooth contact patterns and precise rolling torque using inch-pound measurements to ensure longevity. Zumbrota employs an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary shot-enticed deep cleaning process, setting a high standard for axle assembly remanufacturing. The unit is not pre-filled with oil.