The disadvantage is the covers sealed with RTV are hard to remove at the next service interval and once removed
Inner axle shaft operating failures are usually a result of a broken axle u-joint
For Inner Axle Shaft Seal Kits with oil seals and installation tools see: QK4621 2000-2002 with CAD and QK4802 2002 non-CAD
Use for trucks built after 12-17-2006
TK42062 Dynatrac Free-Spin Kit with Warn Hublocks for 99-02.5 F250/F350, Exc 1977-5-1979-ford-np205-housings-retainers The disadvantage is the coversTK42062 Dynatrac Front Free Spin Hub Kit for 1999 2002. 5 Ford F250, F350, and Excursion With Coarse Thread Wheel Studs includes Heat treated chromoly spindles with spindle bearing, spindle seal, Timken wheel bearings and wheel seals, 35 spline 1. 50 inch chromoly outer shafts, 8 bolt Wheel hubs, double spindle nut kit, Warn premium locking hubs, instructions, and All necessary studs and hardware. Fits both rear wheel and ABS and 4 wheel ABS vehicles.