woo hoo fn. found it ...if you have the same prob. start with your exhaust mine was the shroud on my cat and heres how i isolated it put your rig up next to a curb or parking bumper then put in first and slowly let off the clutch untell you hear the sound next get someone to do it for you (SOMEONE YOU TRUST)
alot!!!! jump under your rig (with heavy gloves) and grab your
exhaust and hope the sound goes away ....if not poke around tell isolated
sorry spoke to soon i had to tighten my trans mount as well ..but no more noise
and for the record if someone runs your ass over ITS NOT MY FAULT!!!!