I am getting the same sounds from the rear of my 4x2 Limited, traced the noise to a "cresent" shaped connecting arm that runs from the trailing arm up to the body frame, you can see the arm by looking in through the alloy wheel just over the brake rotor, or just get up in under, I can move both of these on my pat and hear the squeaking dry crunching noise. I have the dealer checking into it.
There are numbers stamped on both parts 0237 1516 on the right, and 0237 1518 on the left.
Really the back end of this machine sounds like its falling apart when driving over rough roads.
I had all kings of suspension problems with my former 2003 PT Cruiser, now it seems like it's gonna start all over again. #@*^%@! Chrysler!!!