3.31 Ratio Semi-Floating Rear Axle Assembly

The Zumbrota Drivetrain RAA435-2032B is a remanufactured axle assembly built to exacting standards for precision and reliability. This unit is specifically designed for Ford 9.75-inch rear differentials with a 3.31 gear ratio, intended for 1999-2000 Ford F150 models equipped with rear disc brakes. The assembly includes the axle cover, features 12 MM wheel studs, and is a semi-floating axle type without Posi Traction. During the remanufacturing process, each axle assembly undergoes thorough inspection for straightness, cracks, and surface wear. All internal components, including ring and pinions, internal gears, and carriers, are fully inspected and tested. To ensure longevity and quiet operation, new bearings and seals are installed, and gears are inspected for optimal tooth contact patterns and correct rolling torque. Proper gear backlash is precisely set for lubrication and performance. Zumbrota employs an exclusive hydro-blast rinse and sandblasting procedure on both internal and external parts, followed by a proprietary shot-enticed deep cleaning process. This rigorous cleaning method sets a high standard for remanufactured axle assemblies. The OE-quality inspection for axle tube straightness is also maintained. The wheel bearings are 2.533 OD. Important compatibility note: This specific axle assembly is for the 1999-2000 Ford F150 with a 3.31 ratio and rear disc brakes. It is crucial to "Check Tag" as variations may exist. This part is specified as "Without Posi Traction." The product is currently out of stock and is a special order item with potential return restrictions.