I have a 2008, 1 ton 4x4. The operator's manual shows a grease zerk on the cv joint of the front driveline. I have looked, felt, probed every inch of that joint and can't locate a place to put grease. Does anyone have an idea of what and where to look?

 

Look at the U joint near the transfer case. Its not a normal grease Zerk as its looks like a small bump in the middle of the U joint with a small bearing and I had to use a grease type needle to get the grease in to the U joint.

 

Not sure if the 08s are the same. If so, these threads should help you.
https://www.dieseltruckresource.com/...d.php?t=181267
https://www.dieseltruckresource.com/...ont+driveshaft