3.73 Ratio Dana 70HD 10.5-Inch Ring Gear Rear Axle Assembly

The Zumbrota Drivetrain RAA435-1659B is a remanufactured complete axle assembly, specifically engineered for 1990-1991 GM 3500 pickup trucks equipped with dual rear wheels (DRW) and utilizing VIN codes R or V for the engine/drivetrain configuration. This unit features a 3.73 gear ratio within a robust Dana 70HD axle housing, characterized by a 10.5-inch diameter ring gear and a 10-bolt cover. Zumbrota Drivetrain emphasizes a meticulous remanufacturing process. Each axle assembly begins with a thorough inspection of the housing and tubes, ensuring they meet OEM specifications for straightness, surface wear, and absence of cracks. All internal components, including the ring and pinion gears, clutch assemblies, and carrier, are subjected to a 100% inspection. Critical wear items such as bearings, seals, crush sleeves, pinion nuts, and shims are systematically replaced with new parts to guarantee reliability and performance. The housing is meticulously cleaned via a state-of-the-art hydro blasting and rinsing process, restoring it to an OEM finish. Precision setup is achieved through the establishment of correct rolling torque, measured in inch-pounds, which is crucial for optimal longevity and smooth operation. This specific RAA435-1659B axle assembly is configured without a Posi Traction limited-slip differential. It is important to note that this assembly does not include hubs, brakes, backing plates, or axle shafts, and these components will need to be sourced separately or retained from the original axle. The unit is built to order, with an estimated lead time for shipment. A refundable core charge applies, which is returned upon the receipt of your old, salvageable axle for recycling or rebuilding.