Is the sound loud enough for you to record and upload for me to hear? Also, is there anything you do that seems to prompt it to happen? For example, if you apply the brakes or hit a bump, does it happen? I realize you indicated it happens even sitting still, which is really interesting.
I attached an exploded view of the rear suspension parts of this vehicle. Most of the parts there are mounted via rubber bushings. If one has collapsed or broken apart, it can cause a noise. Also, a broken coil spring can also cause the sound.
The idea that you mentioned the exhaust is also a possibility. If you move the tailpipe around, does it feel loose? If you move it, can you reproduce the sound?
Let me know.
See pic below.
Thursday, August 18th, 2022 AT 8:12 PM