Rear AMC 20 Yukon 1 Piece Axles and a Detroit

This fluid looked great! Gotta give my Dad some credit here, he had the ingenious idea of drilling and tapping a hole for a drain plug between the vertical ribs on the underside of the housing in the 20. He just tapped the hole out for a 1/4" allen plug and it is totally protected by the ribs in the housing. Makes fluid changes a breeze now. Shouldn't even have to remove the cover unless it's leaking.