Sure grip swap
Yes,, measure the back-lash of the gears you're going to use,, and re-set it to that on re-assembly.. Make sure both mating surface are perfect..
If you leave the pinion alone,, you won't need to replace a "crush sleeve" if your case uses one..
If you don't know the history of the diff, it may be prudent to totally diss-assemble, inspect, and replace bearings/seal/crush sleeve as nec..