It has been a while, (about a year) since I changed them out. I know I had to change how the shims where set up on the outside of the axle shafts. The manual speaks of no shims on driver side but I had to shim a little to allow the bearing on the passenger side to engage enough to stay in. I did put the shims back in on the carrier. I may not have made sure the teeth where engaging the pinion teeth in the same place. This was the first time for me to try and repair this. I know the cylinder in the center with the hole in it that keeps the space is cracked.