I appologize now if this question has already been answered, I couldn't find it anywhere. My 87 XJ has a few miles on it, I rebuilt the 4.0, and now I have a new transfer case ordered. The AW4 and the transfer case have never been seperated so I was wondering if there is some kind of output end bushing or bearing or seal etc on the AW4 that would be worth replacing while I have the transfer case out ? THANKS