Dana 80 11.25-Inch 4.10 Positraction Axle Assembly

The Zumbrota Drivetrain RAA435-1987B-P is a remanufactured complete axle assembly built to high standards of precision and reliability, specifically for the Dana 80 rear axle. This unit is designed for 1999-2000 Ford F-350 trucks equipped with Dual Rear Wheels (DRW) and features a 4.10 gear ratio with a Positraction/Limited Slip differential for enhanced traction. During the remanufacturing process, Zumbrota Drivetrain thoroughly inspects each axle assembly for critical components such as ring and pinions, internal gears, clutches, and carriers. All bearings and seals are replaced, and gears are meticulously inspected for optimal tooth contact patterns and precise setup using inch-pound measurements to ensure longevity. The assembly is carefully set with the correct gear backlash for proper lubrication and quiet operation, and axle tubes are verified for OEM standards of straightness. Zumbrota employs an exclusive hydro-blast rinse, sandblasting, and a proprietary deep cleaning procedure for their internal and external parts. This particular axle assembly includes the main differential components but explicitly does not include hubs, brakes, backing plates, or axle shafts. The ring gear diameter measures 11.25 inches, and the original tag numbers associated with this assembly are F81A-AUG and F81A-AUH. Compatibility is specifically for the 1999-2000 Ford F-350 DRW models with the Dana 80 rear axle and a 4.10 gear ratio. Always confirm the tag numbers on your existing axle to ensure correct fitment.