This is all interesting. Given the suckers seem to last until they get rusty ... or a locked borg warner TC shatters them..... They must be quite robust. I image the fact its such a clean environment with no rubber boots that split is one of the reasons they last so well in oil (even when the oil is left empty for extended periods of time [bighmmm] ). I'm going to give the liquid grease a go. If I end up rebuilding the swivels and seals, I'll just run oil (oil is so much simpler than messing around with everything else).
seeya,
Shane L.

