pepsiman

For the few months my 1500 has had a strange squeak that seems to come from the area of the center support bearing.( Hard to pinpoint).It is most noticeable when it gets warmed up real good and only when throttle is applied. instantly stops squeaking when throttle is let up. louder going up an incline. It doesnt sound like u-joints as the squeak is a very steady sound. not the chirp of a bad u-joint. we replaced center bearing and inspected all u-joints which looked to be in great shape. Any ideas before insanity sets in?