4. Though this kit is very simple and easy to install, there is one tricky step. The bearing spacer does not sit snugly on the axleshaft and will have to be held in place on the bearing as the bolts are tightened holding the backing plate and bearing retainer plate. This is much easier said than done, by the way. Remember that you also have to spin the axleshaft to get the access hole in the flange to line up with each bolt so you can tighten the nuts (while remembering to keep holding the bearing spacer in place for the entire time).