Wow, you learn a lot when maintaining these old cars... especially from guys like Jeroen and Jason. The disc springs were missing from both the Bosscat manual and pro-diff instructions. I use them in all my diffs like it said in my old Procat manual. Thing is the vintage manuals all say arrange them like so )) but other manuals e.g. SX show )()( very confusing?? Can anyone also tell me if the washers should be glued to the alloy carriers in the pro diff?