Re: Strange noise has me stumped.
A couple of ideas.
1) Cracked flex plate.
2) loose bed bolts.
Sometimes it is extremely difficult to tell exactly where the sound is coming from.
Get someone to drive the truck in a circle around you. Should be able to do short acceleration bursts this way. Try it in both directions. I have had good luck with this procedure. It's a lot easier to pinpoint the sound source from outside the vehicle.
Good luck
Rick
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