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The USA Standard Spartan Locker for GM 8.5-inch with 28-spline axles is a lunchbox-style mechanical locker that replaces spider gears to deliver reliable 100% lockup traction. Its spring-and-pin design makes installation simpler in many carrier cases, and the unit is built with heat-treated 9310 steel internals for added strength, making it suitable for GM 8.5in 28-spline axle setups.
USA Standard Spartan Locker For GM 8.5in w/ 28 Spline Axles / Incl. Heavy-Duty Cross Pin Shaft
