Russ, this made me laugh when I read it because EVERYTHING rattles on one of my Jeeps. Hheehee, its so funny to drive it, and I can't bear to change it. It's got that certain "junker apppeal."
Anyway, did you remove the hood and drive it, just to make sure? Fortunately for us Jeep owners, removal of almost anything on our rigs isnt too hard to accomplish.
If it is the hood, check to see if the rubber bumoers are all there, or if they are worn so badly you have metal to metal contact.
I knew a guy once who thought his front end was coming out from under him and the jack strapped to his rear bumper had come looose and was scraping on the ground and bouncing around!
Ol' Boggy Bottom
'83 & '84CJs, '51, '53, and '57 Willys Pickups