These gears offer a 10% overdrive in high range, equivalent to converting axle gears from the 4.10 to 3.70 gears without having to do ring & pinion work. Popular for diesel models or vehicles with engine swaps to reduce RPM at highway speeds.
We recommend ordering a new TCB50003 t-case input shaft bearing, and TOOLFIPGRS form in place gasket maker to complete installation. If your t-case is in need of a full bearing and seal overhaul please order TC9092 or TC9297 transfer case rebuild kit.