Just came across this thread, and it sounds like the exact problem I'm having.
(My original post: http://www.ramforumz.com/showthread.php?t=151406
Them saying Performance Exhaust is what caused your problem is BS if you ask me. I've owned my truck for a month, and its completely stock. No performance exhaust, no chip...nothing!
I've brought it to my chrysler dealer 3 times now. They have yet to do anything about it, tell me its a lifter, and that they do not have a tech with that level of certification to take it apart. I know what a lifter sounds like...its not a lifter!
Any updates on this? I'd love to be able to stop driving around in tow/haul to prevent it from dropping into MDS and sounding like I put zip ties on every axle!