Billet Alum. Locker

The Winters billet aluminum locker is a precision differential carrier designed for serious drag racers, circle track competitors, and high-performance enthusiasts who demand absolute traction control. This standard-duty locker replaces your factory open differential with a mechanically locked unit that forces both rear wheels to turn at identical speeds, eliminating wheel spin and delivering maximum acceleration off the line. Built for quick-change rear assemblies, it's the go-to choice for competitors running dedicated race cars where consistent power delivery trumps street manners.

Machined from aerospace-grade billet aluminum, the WIN5114-01 features a 2.33-inch side gear spline interface that mates directly into Winters quick-change housings. The billet construction minimizes weight compared to cast iron carriers while maintaining exceptional rigidity under load—critical for handling the shock loads generated during hard acceleration and cornering. The aluminum design also aids heat dissipation in extended racing sessions, keeping differential oil temperatures stable. This locker delivers 100-percent lock on both wheels simultaneously, providing zero slip and maximum torque multiplication through both tires.

Competitors running Winters quick-change rear ends—whether in circle track, bracket racing, or drag strip environments—will find this locker indispensable for cars that see full-throttle launches. Installation is straightforward on compatible Winters housings; the 2.33-inch spline engagement ensures positive engagement without modification. At 13.34 lbs, this carrier is lightweight enough for single-digit weight distribution adjustments in weight-critical race cars. Verify your quick-change housing's spline specification before purchase to ensure compatibility with this standard locker configuration.