Which Yoke and leak questions

I read an article at one point in time that early mopar slip yokes had a vent hole in the center plug to let air in and out and a slip on seal on the front side of the yoke and the yoke was packed with grease. Maybe this yoke you have is from one of these early cars. The repair for this was to have the hole welded up and allow the transmission fluid to lube the slip yoke like all modern transmissions do.

Brian