Rear Axle Assy 2.73 Ratio 28 Spline Posi Traction

The Zumbrota Drivetrain Reman Rear Axle Assy is a professionally rebuilt unit featuring a GM 10 Bolt 8.5 inch ring gear. This assembly is engineered with a 2.73 gear ratio and is designed for vehicles equipped with 28 spline axles and Posi Traction for enhanced performance. This remanufactured rear axle assembly is specifically designed for 2WD 1978-1987 GM 1/2 ton trucks and 1978-1988 GM 1/2 ton Suburbans. It is built to OEM specifications, ensuring a precise fit and reliable operation. The rebuilding process includes 100% replacement of bearings, seals, crush sleeves, pinion nuts, and shims. All internal components, including ring and pinion gears, internal gears, clutches, and carriers, undergo a thorough inspection. Housings are tested for surface wear and cracks, and tubes are straightened to OEM specifications. Important technical notes indicate that this assembly does not include hubs, brakes, backing plates, or axle shafts, and these components will need to be sourced separately. The remanufacturing process ensures correct rolling torque is established using inch-pound measurements for precision setup and longevity. All housings are cleaned using a hydro blasting and rinsing process to restore them to an OEM finish.