The shim on the pivot is gone just a few bits left now we know why it was loose.
The rear end is totally apart. The rear end was run without oil for a long time before I got the tractor. The bearing for the pto are junk.
Oh and the mystery lever isn’t a locking diff like I was told. It determines if the pto is running at pro speed (540 or 720 selectable at the transmission) neutral or wheel speed. That is how they power to a trailer that has a driven axle. Now I know. Oh the input bearing to the rear end is also junk. I have actually taken this entire tractor apart from the very front to the very back and fixed everything we could find wrong which was alot of stuff.