I am working on a 2005 yukon xl denali 2 wd the rear end is the 8.62 locker rear end with 10 bolt pan i pulled everything apart the front bearing is the one that was bad but i pulled the pinion and did all the bearings anyway when i started to put it back together the pinion wont tighten back up no matter what i do it goes in and out about 1/2 an inch like something is missing out of it when i pulled the yoke back off it the bearing was past the spline so im assuming it is going on as far as it can i tried it with the new crush sleeve which didnt even get touched that i can tell i used the old crush sleeve i even tried it with no crush sleeve and it will not get tight any ideas as to why this would happen or what im missing here