Rear Axle Assembly 4.10 Ratio Open Differential

The Zumbrota Drivetrain RAA435-281B is a remanufactured rear axle assembly for 2011-2014 GM 3500 DRW Cab Chassis trucks. This unit is specifically designed for models without the Wide Track option and features an AAM 11.5-inch ring gear with a 4.10 ratio and an open differential. It is compatible with Dual Rear Wheels and models without Posi Traction, but does not include hubs, brakes, backing plates, or axle shafts. The assembly is rebuilt to stringent quality standards, including inspection for straightness, cracks, and surface wear. All internal components, such as ring and pinions, internal gears, clutches, and carriers, are fully inspected and tested. Every Zumbrota axle assembly includes a 100% replacement of bearings, seals, crush sleeves, pinion nuts, and shims to ensure optimal performance and durability. Gears are meticulously inspected for proper tooth contact patterns and correct rolling torque, using inch-pound measurements for precise setup. The housing undergoes a state-of-the-art hydro-blasting and rinsing process, restoring it to OEM finish, and all tubes are inspected for straightness to OEM specifications.