Latley everytime I put my Ram into reverse and start to backup I hear a squeak that seems like its coming from the rear of the truck. The squeak increases with speed. When I go forward I don't hear anything. Has anyone else had a problem like this before? Thanks.

 

when my drive shaft ujoint went bad it started squeaking in reverse, then began squeaking in forward at slow speeds, and then all the needle bearings fell out and it started vibrating real bad. check on level ground, wheels blocked, out of gear, all tension off all components. any wiggle is bad.