I have owned my manual 08 JKU for a few weeks now and had asked around about an annoying rattle and some of you guys said may be the heat shield and such. After driving it for awhile now I have realized that the only time it rattles is at x1900 rpm's in 1st through 3rd gear...anyone know what that means or might be. Thanks

 

Heat shield man I didn't know what it was until saw some pics and I found the crack in the weld ima fix it this weekend hopefully