Just watch out what year it is, the 9 1/4s in the newer pickup trucks had a lot of problems with breaking, there was a NHTSA investigation into the 9 1/4's that came in RAMs they where failing at highway speeds.
That problem is pinion nuts loosening, and i have seen EVERY make of diff do it. Was or seemed to be more prevalent among the 1500' series dodges though which only used the 9.25
However it was a very simple fix, and if people paid attention that nonsense of rear diffs locking wouldn't happen, but when you see people even here make posts, my ________ makes noise.... yeah well noise means something is coming apart and NEEDS more than just a question on a forum, but yeah, ask a question and just keep using it....
