Yukon Trac-Loc for Ford 8" with 31-spline axles features an aggressive setup with four preload springs and a four-pinion design to deliver stronger torque biasing. The unit fits 8" Ford housings with 31 splines and is rebuildable, intended for applications where a more pronounced limited-slip response is preferred across supported gear ratios.
Yukon Gear Trac-Loc For Ford 8in With 31 Spline Axles. Aggressive Design