I haven't had the clunk you all talk about. But, I've noticed that the suspension and sway bars are so stiff that when you take an incline coming in or out of a parking lot at an angle, one of the rear wheels will lift off the ground. Is this when you are all hearing this? If so, all it is is the shocks bottoming out, then the wheel hits the ground as the car levels out. Let me know if this isn't what you are all hearing. It is cool how the shocks do this though. Has anyone else noticed this? I knew it felt like it inside the car, but then a friend told me as I was leaving a parking lot one day that my wheel came off the ground b/c my frame is so stiff from the reinforcements.