Nick,
Thanks for the video link! So the joints aren't greasable, only the ball (or the bearing for the ball) on the constant velocity joint. Jeez I should take a look at our Jeep, I've never greased it, I bet there could be a zerk in there too. There's 200k on our jeep front driveshaft and it still seems tight, so they last a long time.
It seems like a guy should should at 100k almost remove the front driveshaft, pull off the yoke, clean everything with solvent and regrease. Anyone done that?? Actually, If I did that I would probably drill and install zerk on the slip yoke.
Your welcome. I figured i would make that video as this question comes up ALOT on alot of forums and pages. I am horrible at making videos lol but at least it gives everyone and idea. that is the only part that gets greased. I havent even thought about taking it apart and doing that as i have less than 5,000 miles on my 17 Power Wagon but it is a good idea and easy enough to do. I just may do it when the time comes