Remanufactured Axle Assembly 3.73 Ratio GM 8.6" 10-Bolt

The Zumbrota Drivetrain RAA435-162 is a remanufactured axle assembly engineered for GM 8.6-inch 10-bolt ring gear applications. This unit comes with a 3.73 gear ratio and is specifically designed to work with Active Brake Control (JL4) and the GT4 ratio option. It does not include Posi Traction, hubs, brakes, backing plates, or axle shafts. Each axle assembly is meticulously rebuilt to exacting standards, ensuring precision and reliability. Zumbrota Drivetrain's process involves a comprehensive inspection of all components, including the ring and pinion, internal gears, clutches, and carriers. All bearings and seals are replaced with new parts. The gears are tested for optimal tooth contact patterns and correct rolling torque, measured in inch-pounds for precise setup and extended longevity. Gear backlash is carefully set to ensure proper lubrication and quiet operation. The remanufacturing process includes thorough inspection of axle tubes for straightness to OEM specifications, and housings are tested for surface wear and cracks. Zumbrota utilizes an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary shot-peened deep cleaning process, setting a high standard for axle assembly remanufacturing.