95 T/A suspension noise

I have a 1996 T/A with only 37,000 miles and the rear suspension is creaking when going over speed bumps and the like. The rear shocks were replaced not too long ago and they do catch the vehicle when I lay on it so I do not think it's the shock absorbers. I do see where the springs seem to be resting right on the metal, which could be normal, I do not know if there is suposed to be a rubber stop that the spring lays on? Any help or a diagram/schematic would be greatly helpful.
Thanks,
Kevin

could be the sway bar bushings take them off one at a time (easier than dropping the whole bar) and rub some grease on the rubber put it back together and go for a drive see if it is gone if not it could be the shock bushings same deal on them