8 3/4 diff

I had my yoke changed and the guy did not put in a new crush sleeve and I am told this should have been done. I have never gotten into a differential and not sure if I should have it done for me or not. I am always nervous about others working on my car as it seems there is always a problem after I get it back. So, some advise please?

Do I need to take the pinion completely out of the case or can it be replaced by just removing the yoke, seal and front bearing? I know he correct pre-load is critical. Also would it be a good idea to replace the pinion bearings at the same time? I never had a noise until after the yoke was replaced.