Complete Axle Assembly 3.73 Ratio

The Zumbrota Drivetrain RAA435-1906C is a remanufactured complete axle assembly specifically designed for Ford 9.75-inch ring gear applications. This unit features a 3.73 gear ratio and is intended for 1997-1998 Ford Expedition models. It is crucial to check the tag number (S935C) for exact fitment confirmation. Zumbrota Drivetrain prides itself on rebuilding axle assemblies to the highest standards of precision and reliability. Each unit undergoes thorough inspection for straightness, cracks, and surface wear. All internal components, including ring and pinions, internal gears, clutches, and carriers, are meticulously inspected and tested. To ensure optimal performance and longevity, all bearings and seals are replaced, and gears are set for correct tooth contact patterns, rolling torque, and backlash. The remanufacturing process includes rigorous cleaning procedures, such as Zumbrota's exclusive hydro-blast rinse and sandblasting, followed by a proprietary deep cleaning process. This ensures all housings meet OEM specifications for straightness and are free from surface wear and cracks. The assembly is set up using precise inch-pound measurements for correct rolling torque and proper gear lubrication for quiet operation. Note that this assembly does not include hubs, brakes, backing plates, or axle shafts.