Rear Axle Assembly 3.92 Ratio 10-Bolt

The Zumbrota Drivetrain RAA435-139B is a completely remanufactured axle assembly designed for Chrysler 8.25-inch rear differentials. It is engineered with a 3.92 gear ratio and features a 10-bolt round cover. Each Zumbrota axle assembly is rebuilt to stringent quality standards to ensure precision and reliability. The remanufacturing process involves a thorough inspection of the housing for straightness, cracks, and surface wear. All internal components, including the ring and pinions, internal gears, clutches, and carriers, undergo comprehensive inspection and testing. To guarantee optimal performance and longevity, all bearings, seals, crush sleeves, pinion nuts, and shims are replaced with new parts. Gears are meticulously inspected for proper tooth contact patterns and set to precise rolling torque using inch-pound measurements, ensuring correct backlash for adequate gear lubrication and quiet operation. The cleaning of Zumbrota axle assemblies utilizes an exclusive hydro-blast rinse and sandblasting procedure on both internal and external parts, followed by a proprietary shot-enticed deep cleaning process. This comprehensive cleaning method restores housings to OEM finish standards. The housing tubes are also inspected and straightened to meet OEM specifications. This specific RAA435-139B model is configured without Posi Traction and is sold without hubs, brakes, backing plates, or axle shafts, focusing on the core differential components. The axle cover is included with the assembly, but differential fluid is not supplied. This assembly is compatible with 2007-2009 Chrysler Aspen and Durango models with the 8.25" axle.