Noises are never easy to diagnose in cyber space.
Transfer case is plugged into transmission below the left axle shaft.
Is the noise consistent?
Does noise level/pitch or intensity changes with vehicle speed?
Does it changes with upshifting?
Where is noise coming from, front or rear of vehicle?
Try disconnectiong and removing the propeller shaft and drive in 2 wheel mode to see if noise is still there.
Tuesday, January 18th, 2011 AT 2:42 PM