Dana 80 4.88 Posi-Traction Axle Assembly

The Zumbrota Drivetrain RAA435-1990A-P is a remanufactured axle assembly designed for 1999-2000 Ford F-450 models equipped with dual rear wheels. This assembly features a robust Dana 80 axle, a 4.88 gear ratio for optimal performance, and a Posi-Traction differential for enhanced grip. Each Zumbrota axle assembly is rebuilt to exacting standards, undergoing thorough inspection for straightness, cracks, and wear. All internal components, including the ring and pinion gears, clutches, and carriers, are meticulously inspected and tested. New bearings and seals are installed, and gears are precisely set for optimal tooth contact, correct rolling torque, and proper backlash to ensure longevity and quiet operation. Zumbrota employs a rigorous cleaning process, including hydro-blasting and sandblasting, followed by a proprietary shot-peening procedure to prepare all parts, setting a high standard for remanufactured axle assemblies. This specific unit is for the Dana 80 axle with an 11.25-inch ring gear and Posi-Traction. Please note that this assembly does not include hubs, brakes, backing plates, or axle shafts.