Q&A

 Master

There may not be any a lot of manufactures use sealed for life style Universal Joints.

 Enthusiast

there is'nt one. they are "sealed"

None. Sealed for life.

YOUR FACTORY U JOINTS, BALL JOINTS ECT WONT HAVE ZERKS ON DODGE TRUCKS

There is indeed a grease fitting on the front drive shaft constant velocity joint - but it is not a zerk, it is a button fitting and you need a needle adapter to grease it. The needle adapter basically looks like a syringe needle with a zerk on the back end.
Jack one front wheel off the ground so you can turn the drive shaft. position yourself under there so you can look at the joint in the direction the arrow points on the diagram under your hood.
A long thin brush or long cotton tip swabs are very helpful to find the thing because once it is covered with dirt and grease, you can't see it because it is flat and flush with the casting. The fitting looks like an aluminum disk with a small hole in the center and is about half the size of a dime. It doesn't grease a U-joint, it greases the ball swivel of the CV Joint.
Once you find the fitting, insert the needle in the hole and you can feel it plunge in up to ~ 3/8". Now let it sit in the hole, put your gun on the adapter zerk and pump away while holding that needle firmly in the hole via force on the grease gun tip.

I bought my 2006 2500 used and that warning under hood drove me nuts until I figured it out. I think Chrysler could have done a much better job of communicating the wheres and hows of this fitting - even the guys at the dealer didn't seem to know anything about it.