New to this forum. How is everybody? I have a 2003 Ram 1500 4x2 5.7L. My problem is a "gruling" noise from somewhere in the driveline, I just can't figure out where it's coming from, so far I've changed the rear diff fluid, u-joints, and replaced the bearings and seals inside the tailshaft housing.... still there, has anyone else had this problem?

 

Might be the pinion bearing in the carrier going bad. Do the pitch change with speed?