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The USA Standard Spartan Locker fits Ford 8" and 9" carriers with 28 or 31 spline axles and works with stock side gears in a standard carrier case to deliver mechanical 100% lockup traction. Its compact lunchbox design uses a spring-and-pin arrangement that simplifies installation, while heat-treated 9310 steel internals provide added strength for Ford 8in and 9in axle applications.
USA Standard Spartan Locker For Ford 9in / 28 or 31 Spline
