My rear suspension has been creaking for a while, mostly over speedbumps and during low speed turns (ie in parking lots, but prob. just cant hear it at high speeds). Anyway it has been driving me nuts so I decided to fix it today, I silicon sprayed everything that moved under there and that didn't do it. I pushed and pried on everything until I replicated the noise by pulling/pushing the panhard support brace(the stamped piece that connects near the panhard bar on one side and goes up to the chassis). I checked the bolts up top and they were tight(they had fallen out a couple of years ago so I check them often!). Turns out the bolt at the lower(right) side was loose, and since there isnt a real bushing in there was allowing significant movement. It might be a good idea to loosen the panhard bar as well and tighten the two of them 'lugnut' style(alternating) like I did. Anyway I cant replicate the noise anymore, so I think that fixed it- I'll know for sure on my drive tommorow though, just thought I would share with you guys in case anyone has the same problem!

 

Wow mine makes the same noise, have to check it out, thanks!