Hello to everyone. Sorry for my first post being a request for help, but I need some info. I am trying to change to 4.10 gears. The rear changed out fine with the donor parts after I realized the whole center section had to be changed. The front however has different bearings, mine had a crush collar, the other didn't, the other one had shims on the pinion, mine didn't, etc. The donor axle has the vaccum disconnect, mine doesn't. My Jeep is a 1997 with a 6 cyl. Can I change the bearing or anything to make this work? Thanks for any input.