Noise when moving... transfer case?

[s1ngletracker]

update.... so i realized the noise goes away in 2nd, 4th when i just pull back a little harder on the shifter... and after re-checking shift cable adjustment, it can only be the tranny. I was really scared that maybe it was low on fluid or something. Drained the fluid today, it had plenty, didnt look the best. I took the end cover off to see if the input shaft nut was loose (this was a rebuilt tranny, so i was suspicious). it wasn't loose. put it back together and tomorrow i'll refill it. Hoping new fluid will solve the problem.

I think i've elimiated the transfer case as being the culprit, unless someone still thinks otherwise, but that sure wouldnt explain why the noise goes away when I jiggle with the shifter.