Creaks, Buzzes and other noises you've solved....and how.

I have had a rattle when gining over tracks or bumps going slow.
The previous owner said it was the exhaust system.
I have had it up on my lift and the exhaust system seems solid.
I only have hearing in one ear so I can't tell if it is right, left, front or rear.
I have had the door panel off and it's not in there. Check in the front when I replaced the filters for the heaters, it is not in there. I have taiken everything oput os the trunk and it did not stop,
I would turn the radio up, but I love the sound of the exhaust.
Any ideas?

stephen