The drums are held on with two spindle nuts and a lock ring sandwiched between them. Our Dana 60 required a 2.5-inch spindle nut socket. You can purchase these from a specialty tool store. The lock ring has tabs that are bent down over the flat edges of the nut, as well as a key that fits in a groove on the spindle. Remove the first nut then use a screwdriver to straighten the tabs on the lock ring. Remove the ring and the second nut. The wheel bearing will slide out as you move the drum off the spindle.