Well its the same suspension issue with the rear thump. Have relocated the parking brake cables and replaced both links and top bushings for the rear swaybar (no change). (FYI its a 99 SVT with 45K). The thumb is getting real loud whenever I go over small bumps, as if the entire rear is loose. When the back was up, everything seemed tight(all i could do was pull at various components) and no springs looked broken. The struts seem fine from the simple up/down test. Any suggestions are really appreciated as this thing is getting real loud and friends no longer feel comfortable(ie safe) driving in the car.