Case 580CK oil questions

I've got a 1967 Case 580 CK that is pretty well used. I'm changing the oil in the drive line and need some basic answers. I've got a service manual for it but can't find what I need. There are 3 oil fill holes on the drive line. One in the very back over the differential. Does it want 90W gear oil in that? One other hole is a few inches in front of the shift lever. Does that take Case TCH oil? And one half way between the shifter and the bell housing. That may be the shuttle and I think...

Case 580CK oil questions

Case 580CK oil questions