Hey i had a post about my 05 tj with a rattling problem coming from the back end of the jeep. I took it to the dealer and finally they found what the problem was, after a test drive with the tech guy he heard the rattle and told me to bring it in so he can take a look at it so i did after about 3 hours the dealer call me back say that they fixed the problem and the problem was that the (emmisions canister was loose so they retorqued it) and yes it now fixed i cant hear a thing while off-roading or driving on the street. it was coverd by the warrenty.

so if anyone is haveing the same problem hope this can help.