Here, DTS uses Strange Engineering 31-spline S/S series alloy axles. New axle bearings are pressed on before the axles are installed. The 9-inch bearing ends utilized on our housing require 9-inch-style bearings, of course. The 9-inch-style bearing is superior to the stock 8.8-inch-style bearing for two reasons: One, the bearing is simply larger and can take more load, and two, the bearing has a true inner race whereas the 8.8-inch axle bearing uses the axle shaft itself as an inner race. This means if the bearing goes bad on a stock 8.8, it usually takes the axle with it. Ouch.