4.10 Ratio Rear Axle Assembly

The Zumbrota Drivetrain RAA440-1381C is a remanufactured axle assembly specifically engineered for 2004-2005 Ford F-150 vehicles equipped with the 8.8-inch IFS (Independent Front Suspension) system. This unit features a 4.10 gear ratio and comes with a durable steel cover, designed to meet rigorous quality standards for precision and reliability. Each axle assembly undergoes a comprehensive remanufacturing process. This includes a meticulous inspection of all internal components, such as ring and pinions, internal gears, clutches, and carriers, to ensure they meet OEM specifications. All bearings, seals, crush sleeves, pinion nuts, and shims are replaced with new parts. The gears are precisely set for optimal tooth contact patterns and rolling torque, utilizing inch-pound measurements for longevity and quiet operation. Backlash is carefully adjusted to ensure proper gear lubrication and smooth performance. Zumbrota Drivetrain employs an exclusive hydro-blast rinse and sandblasting procedure for internal and external parts, followed by a proprietary shot-enticed deep cleaning process. This extensive cleaning and inspection regimen sets a high standard for axle assembly remanufacturing. The axle tubes are also inspected to confirm they meet OEM standards for straightness, and the unit is shipped in high-density plastic totes to minimize the risk of in-transit damage.