Ford Repair: Ford Expedition, eddie bauer, ford expedition

Question
I have a rattle, almost like a jingle (loose washer sound or something) coming from the undercarriage of my 1999 Eddie Bauer Exped.  I've heard other Exped.'s do it also.  Its very annoying and only rattles/jingles when hitting bumps etc.  Do you know what this is or how to fix it?  

Answer
Hello and thanks for the question...I'll try to help.
 I couldn't tell you with out hearing it for my self. What you might want to do is take a look under the vehicle and see that the exhaust isn't rotted out and banging around.
Hope this helps,
Erik