so i bought a new truck. its a 3500 ext cab longbed duely. it has a 5 speed and there is a "pinging" noise when i let out on the clutch in 1st 2nd and somtimes 3rd. i cant figure out where it is coming from. it sounds like the clutch at times and other times it sounds like the trac bar. the reason i think of the track bar is because it only does it when letting the clutch out in the lower gears. in the lower gears the truck torques more. it has done a few times in 4th and 5th but its rare. the truck is a bone stock 2002 3500 with 81,000 miles on the clock. anybody ever had this problem before or any ideas what it could be?