Today I tried to change out the rotors on my 92 Exp with Auto locking hubs. Got everything off fine but I can't seem to get the locking cam assembly back on. I know that they are spring loaded. Is there some kind of trick to this. Changing rotors should be this hard.

Also, I figured while I had the front wheels off I might as well change the shocks. I torqued the bottom mount bolt and it sheared off. I called Ford and they said that I had to purchase the entire lower radius arm. Is this true or can I just replace the bolt?

Thanks.