Your diagnosis was "dead-on" correct!

I lubed that center of the double u-joint at transfer case and no more chirping! FYI - the 2004 models have no inverted grease fitting like the 2008 and later trucks.

I'm not feling too badly about the hubs and u-joint replacements at 142,00 plus miles. I got the "best" out of them, and should be good to go for a long time now.

Also, I had to replace an upper right side ball joint that was loose, so I would have replaced hub and u-joint at the same time regardless. Now it is close to time for new tires! I wasn't doing that and front end alignment with a bad ball joint. Thanks!