GM 8.0" Rear Axle Assembly 3.73 Posi LSD

The Zumbrota Drivetrain RAA435-187-P is a remanufactured axle assembly designed as a direct replacement for 2009-2012 GM Colorado and Canyon models equipped with the 8.0" axle. This unit features a 3.73 gear ratio and a Posi Limited Slip Differential (LSD) for enhanced traction. Each Zumbrota Drivetrain axle assembly is meticulously rebuilt to exacting quality standards. The remanufacturing process includes a thorough inspection of all internal components, such as ring and pinions, internal gears, clutches, and carriers. All bearings, seals, crush sleeves, pinion nuts, and shims are replaced to ensure reliability and longevity. Gears are precisely set for optimal tooth contact patterns, correct backlash, and proper rolling torque, contributing to smooth operation and extended service life. Additionally, axle tubes are inspected for OEM specifications of straightness, and housings are cleaned using an exclusive hydro-blast rinse and sandblasting procedure, followed by a proprietary deep cleaning process. Key specifications for this axle assembly include an 8.0" ring gear diameter, a 3.73 gear ratio, and a Posi LSD. It is designed for RWD and 4WD models with the 3.7L engine and the Z71 option. The unit is built to order and ships when ready, with a core charge applied and refundable upon return of the old part.