[Jacques Reed]

I recently found this in the British War Dept Ford Special Pattern Vehicle Handbook. It confirms what I thought. On a Ford with the Rzeppa type CV joints (B design) they can be lubricated between major overhaul by pumping lube down the central hole from the outer end after removing the hubcap and plug.

Unfortunately, Bendix type (A design) as used on Chev CMP's require the described method of a tube through the access plug hole in the socket as there is no center hole through it.

With Fords that lack the access plug hole in the socket, (and some do), the only way to get lube into the central cage and balls between overhauls is through the center hole in the CV joint.

I have noted also on several Rzeppa joints I had, that the slot in the plug in the end is chewed up making its removal difficult, if not impossible. It is a very shallow slot so requires a screwdriver with a good blade that hasn't been used regularly as a prybar or scraper.