Loud rattling sound, please say it ain't so...

[RazM]

*UPDATED, found the problem, check post below*

Ok, I have an early H3, build was sometime in May of 2005, so I know it falls under some of the early build problems. So far I haven't had any major issues.

Yesterday, on the way home, I heard what I thought was a rock hitting the wheel well... Soon after that, the truck started making a loud rattle, almost like a machine gun, or rocks in a tin can. I've done as much checking around as I could, and all seems well with the skidplating and nothing seems loose.

It starts around 2200rpm, at about 20mph and is heard when the windows are down, it sounds equally loud from the driver and passenger side. No sound at all when the truck is idle, and I have had NO noticable power loss or vibrations at all.

I did a search and found JustForFun's post about the problems he's had with his front diff assembly, but from the looks of it he had power loss when his noise started, and I haven't had any?