Complete Rear Axle Assembly 9.75-Inch Ring Gear 3.55 Ratio

The Zumbrota Drivetrain RAA435-2031B is a remanufactured complete axle assembly specifically engineered for the 1999 Ford F-150. This unit boasts a robust 9.75-inch ring gear and a 3.55 gear ratio, designed to work with rear disc brake systems and featuring 12mm wheel studs. It is equipped with 2.533 OD wheel bearings and does not include "Posi Traction" or limited-slip capabilities. The axle type is semi-floating and the differential cover is included, though fluid is not. Zumbrota Drivetrain emphasizes the rigorous remanufacturing process. Each axle assembly undergoes thorough inspection for straightness, cracks, and surface wear. All internal components, including ring and pinions, gears, clutches, and carriers, are meticulously inspected and tested. New bearings and seals are standard, and gears are precisely set for optimal tooth contact, correct rolling torque measured in inch-pounds, and proper backlash to ensure lubrication and quiet operation. Axle tubes are verified for OEM straightness. Zumbrota employs an exclusive cleaning procedure involving hydro-blast rinsing and sandblasting, followed by a proprietary shot-enticed deep cleaning process. This dedication to detail aims to set the standard for axle assembly remanufacturing, ensuring precision and reliability. The product is identified by Hollander Number 435-231B. Please note: This item is special ordered and may have cancellation or return restrictions. Availability is listed as out of stock, and pictures may be representative of style rather than the actual product. Always confirm fitment details, especially the "*Check Tag*" designation.