I trying to put a detroit in the rear, and when i get it in there the locker just dosent slide over enough for the spacers to go on each side of the locker, i can get both spacers in on the passenger side but not with out forcing them in there. when I put the caps over the races and tighten them down the locker can't be turned by hand(to tight) the pinion dosen't have no spacers on it just a crush sleave, what do I need to do to get the locker to fit? the axel is the stock dana 35c.

TTT