Hi all,I have seen other post questions about clunking from rear suspension of92-98 S cars. Has anyone ever really made the problem go away??

What I know:
1. right rear over hard bumps (like railroad tracks) makes hard "thud" noise sounds like shock not tight.
2. I have had car on my lift in air tightened everything, check shock mounts etc.
3. blead shock hydraulic system to make sure there is no air in system.
4. little or no noise from right rear.
5. Exhaust system is tight all hangers present and in good shape.
6. checked trunk for loose battery, jack, tire, etc and all tight.

Any thoughts would be great!

Thanks in advance!