How freely should the bearing spin? They spin for about a second or 2 maybe I'm thinking about just putting the ones they took out back in. Also I was looking at the manual and it shows 2 drive pinion bearing adjuster. They shop gave my parts back and I only have 1 on the bottom bearing the one on the top that goes above the drive pinion spacer is not there. Is it sapposed to be or is it differential specific?