My outer (closest to driveshaft) pinion bearing slides on and off the shaft with only minimal friction. The pinion shaft looks smooth and does not look like any bearings were turning on it. Is this normal? By comparison, my 8.25 was a much tighter fit requiring many whacks with a dead blow hammer to get the pinion out. Also, I don't see any solid spacer under the bearing. Just 4 shims. Two thicker ones and one paper thin. Is that normal? (I had expected a solid spacer similar in size to a crush sleeve.)