The original locking hubs were pretty beat up and prongs in the housing that had broken off so I bought a new set. I also installed all new cone washers that came with the 8mm Hub Stud Kit. Getting the old cone washers out was a real pain and nearly all of them were pretty chewed up. This installation was straightforward; just install the gasket, mount the locking hub base, install the snap rings on the end of the axle and install the locking hub cover.