New foreign-made throwout bearings have virtually no grease in them. A serviceable used one can be re-lubed. There's a tech tip somewhere concerning how to do that. Another problem might be a dry pilot bushing. If a little high temperature grease was not pushed into the pocket behind the pilot bushing during the drive train rebuild, that's probably what's causing the noise. Don't overdo it - - - -a little dab is all that's needed. Both problems will require the transmission to be pulled. Is your transfer case attached directly to the back pf the transmission or is it a "divorced" unit?

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!