I am installing 4:88's in the rear of my jk and I have hit a pretty serious snag. I have everything setup and am going back with final assembly. I put a new crush sleeve on and everything else as needed. Now I am trying to tighten down the nut to get the crush sleeve to "crush" and I just cant get it to budge. I still have a bit of slack in the bearings of the input pinion and I have tried everything. I have a pretty good impact and it will not budge any further. Any ideas?

 

Sometimes we have to put a pipe wrench on the yoke and a breakover bar, with cheater pipe on the pinion nut. Once the sleeve starts to crush it will get easier but they can be a real pain. I feel for ya if you are doing this on the ground as we always have them on a lift. Good luck.

 

I use a torque multiplier.