Eaton Posi - GM 10-Bolt 64-82 8.2in

The Eaton Posi - GM 10-Bolt 64-82 8.2in differential is a performance locking differential designed for classic Chevrolet and GMC light-duty trucks and performance vehicles equipped with the 10-bolt rear axle assembly. Built for enthusiasts who demand improved traction without sacrificing street manners, this differential solves the single-wheel-spin problem that plagues open carriers while maintaining the ability to drive on uneven surfaces.

The Eaton Posi operates on a spring-loaded, clutch-plate design that automatically locks both wheels together under acceleration while allowing them to differentiate during turns—eliminating the torque bias and handling unpredictability of open differentials. This unit weighs 19.19 lbs and fits the 8.2-inch GM 10-bolt housing, a compact yet robust platform common in 1964–1982 General Motors rear axles. Eaton's engineering ensures smooth engagement with minimal noise and harshness compared to mechanical spools, making it suitable for street applications while providing the traction advantage needed for hard acceleration, hill launches, or light trail work.

This differential is ideal for restoration builders, street rodders, and classic truck owners seeking a bolt-in upgrade that improves launch traction without welding the carrier. Whether you're upgrading a vintage C10 pickup, Camaro, or Nova for weekend cruising or mild off-road duty, the Eaton Posi delivers consistent power delivery to both rear wheels when traction matters most.