Lock Right Differential GM 8.5 78-88 28 Spline

The Lock Right Differential GM 8.5 78-88 28 Spline is a premium locking differential designed for GM vehicles equipped with 8.5-inch rear axles from 1978 through 1988. Built by POWERTRAX, a trusted manufacturer of performance drivetrain components, this locker is engineered for drivers who demand improved traction and handling in off-road, street, and motorsport applications.

This differential upgrade replaces the factory open differential with a mechanical locking system that forces both rear wheels to turn at the same speed when engaged. Constructed from durable steel and designed for the 28-spline GM 8.5 axle platform, the Lock Right Differential employs a spring-loaded locking mechanism that automatically engages during acceleration or when traction is needed, then unlocks smoothly during turns for conventional steering feel.

Ideal for classic muscle car enthusiasts, off-road adventurers, and performance-minded drivers, this differential maximizes grip in challenging driving scenarios. The design eliminates wheel spin and torque bias issues inherent in open differentials, delivering consistent power to both rear wheels. Upgrade your vehicle's performance with this reliable locking differential.