It goes on just like the old on..
1. remove and clean the splines on the threaded collar
2. replace collar
3. thread posi-lock on till you can see the indent where the C-clip goes
4. insert C-clip
5. rotate posi-lock towards C-clip and use supplied tool to tighten
6. use RED LOCKTITE... the retaining bolts will back out!
I asked before trying to install..it`s not hard at all..if you cant get the old one off IM me and i`ll tell ya how i got mine off.