Current LRO magazine has a feature on diffs,you would need the height setting tools and a selection of shims to do any serious rebuilding. I am doing a couple at the moment, just have to keep the origional shims in place.I believe shims have to be bought in packets of 10 of each size
Specialist tools available from SPX,Mounting Bridge 205-702,£162.79 Setting Block 205-743 £48.06 Adjuster Nut Remover 205-700 £48.11