Rear Axle Questions...

We used to call them "Speedi sleeves" I think both are brand names, 'Speedi Sleeve' is a brand name of Chicago Rawhide. I spose "shaft repair sleeve" would be the generic name

Also, oil on these yokes, or the front balancer, can leak past the SHAFT and out the nut. Clean the yoke and shaft really good, and smear a SMALL amount of sealer on one or the other.

Speedi Sleeves are thin and delicate. Take care to get it started "square."