Bang in left rear please see posts in suspensios on TLC Help. Thanks, Randy

[Trophyman]

I copied the 2 posts backwards
dumb, huh?
But what does anybody think?
Thanks
Randy
Took back seats out. Double checked every bushing, bolt, mount, weld there is and everything looks good. No cracking in bushings, rubbers, etc. Body mounts all tight. U Joints are tight and greased.
It sounds like the sound is coming from inside the quarter on driver side. With seat out and sitting back there, sounds like it's just below the line where the vinyl top trim runs parallel with the body. About in that area. We reached from front to back and back to front. Nothing in there except my wife's fingers. (scared the hell out of her too)
Ran the car on the stands, but no noise. It doesn't get the same "rise" out of the car. No torque twist or lift ya' know?
So now it comes and goes. ARRRGGGHHH!
Had the wife walk along side the car and I punched it and braked, punched it and braked. Can't hear it from the outside.
Okay-- bear with me here... It sounds like a chunk or a ball of steel hanging on a string inside the quarter-- "Banging" against the wall. But not a sound under panic stop braking.

Now what?
Any ideas?

Thanks,
Randy