BajaFred: Thanks for post on rattle upon acceleration. You PM'd some info to one poster. Mind doing the same for me. My Raptor is barely a year old and just starting exhibiting the issue/sound you mentioned. Thanks, sir.
http://www.fordraptorforum.com/f260/raptor-rattling-riddle-experts-wanted-54408/index2.html
http://www.fordraptorforum.com/f260/raptor-rattling-riddle-experts-wanted-54408/index2.html