Rear Axle Assy 3.42 Ratio 28 Spline Open Traction

The Zumbrota Drivetrain Reman Rear Axle Assy is a remanufactured component designed for GM 10 Bolt 8.5 inch rear axle applications. This assembly features a 3.42 gear ratio, an 8.5-inch ring gear, and a 28-spline axle configuration. It is equipped with an open differential, suitable for 1978-1987 GM 1/2 ton trucks and 1978-1988 GM 1/2 ton Suburbans, specifically for 2WD models. The process includes a complete replacement of all bearings, seals, crush sleeves, pinion nuts, and shims. Furthermore, 100% inspection is performed on all internal components, such as the ring and pinion gears, clutch packs, and carrier. The housings are meticulously cleaned using a hydro blasting and rinsing process to restore an OEM finish, and are tested for surface wear and cracks. All tubes are straightened to meet OEM specifications. Precision setup and longevity are ensured through the establishment of correct rolling torque using inch-pound measurements during the remanufacturing process. The technical notes specify that this unit is for 28 spline axles, has a 3.42 ratio (Ratio Option GU6), and is an "Without Posi Traction" model. It does not include hubs, brakes, backing plates, or axle shafts.