Well I got the last seal today. It's back in the tractor with 2 bolts and the transmission jack holding it in place. Hope to get it running tomorrow and check for leaks.
Pulled that pump apart that was on the rearend that Duke gave me. Can't see any damage at all. My guess is the filter plugged and the PO thought it was bad and changed the complete rear and pump. They did use silicone instead of a case gasket, gotta love silicone in the wrong places. Think I'll overhaul it for a spare for my 1640. Looks like all it needs is a gasket and some cleaning.