Koshin wrote:blown coilovers sound like that...I would check the bottom ring that holds the springs as well...if the top nut on the pillowball is loose at all, itll make a clunking sound like youre describing...Id check the coilovers in the rear before I did anything else...mine did that when I installed them, one of the top nuts was a little looser than it shouldve been,
You'd be pretty hard pressed to blow some new-ish PSM's. They are tanks.
I have a novel idea. Take the hour and drop the pumpkin, pry it open, and have a looksie... Although it'd be a waste of time because it's not your diff.