3.55 Ratio Posi-Traction Axle Assembly

The Zumbrota Drivetrain RAA440-1384B is a remanufactured axle assembly designed for the Ford 8.8 IRS differential system, featuring a 3.55 gear ratio and Posi-Traction limited-slip differential. Each assembly is built to order and undergoes a rigorous remanufacturing process. This includes a 100% inspection of all internal components such as ring and pinion gears, clutch packs, and carriers. The housings are meticulously checked for surface wear and cracks, then restored to an OEM finish via a state-of-the-art hydro blasting and rinsing process. Essential wear items like bearings, seals, crush sleeves, pinion nuts, and shims are systematically replaced to ensure reliability. To guarantee precision setup and longevity, correct rolling torque is established using inch-pound measurements during assembly. The units are shipped in high-density plastic totes to prevent in-transit damage. This axle assembly is specifically designed for 2002-2005 Ford Explorer models equipped with the 8.8 IRS differential and a 3.55 gear ratio. Zumbrota Drivetrain offers comprehensive support, including live tech support via chat or phone at 1-800-347-1188 to answer any fitment or product questions.