Same one. Ball bearing went out on the main input drive shaft, which screwed up the seals going to the DD clutch. This is why it slipped in half the gears. You can see what's left of the seal, as well as the severely worn seal grooves.
I'll say it again: I don't understand why Ford eliminated the low lube pressure warning light on the '68 up tractors. If it had one, the owner could have caught this much sooner and saved some money.