GM-44685 is used to remove the axle shaft bearing from the rear axle housing on C/K (GMT800 based) vehicle equipped with the 86" ring gear rear axle. The bearing size was changed from the previous design C/K truck to increase strength and payload capacity, so the previously essential GM-23689-A Bearing Remover will no longer fit. GM-44685 is inserted into the axle shaft bearing, and it's nut is tightened to secure the bearing between the remover head and the washer. Previously essential GM-2619-O1 Slide Hammer is attached to GM-44685, and used to remove the bearing from the axle housing.