Thanks for the info everyone. I just went out and double checked, looked real close...there are no zerks on the u-joints. Wonder how these newer u-joints stay lubed if there isn't a way to grease them?
Forgot to mention, I greased my two rear power gear levelers. The two front ones didn't have zerks fittings. They appear to be a size smaller jack than the rears. Why don't the front ones need grease?
You hve to imagine a ball rotating in a cuff. When you have a zerk fitting, it lubricates this ball....because it is not machined/cast/whatever all that smooth.
Nowadays, many if not all new or newer cars (and some parts of motorhomes like the universals) have no zerks...because the ball is machined perfectly smooth...and I suspect teflon might be used as a more or less "permanent" lubricator.
However...notice that if and when suspension/steering/those kind of parts are replaced, the new (aftermarket...like MOOG) all HAVE zerk fittings.
Either way....just keep a grease gun handy in the garage...y'never know.