I bought the car knowing it was a mystery mobile from a shady dealer, mainly because the body was seemed in good shape (I don't weld or paint). Now, I'm 99% certain it was in an accident at front, right, and poorly/minimally repaired. In this last round of work, I pulled a terribly corroded 3/8" drive craftsman ratchet from inside front bumper/fender area--no telling how long it was there. I wouldn't be surprised if the socket is still there somewhere, or if the knock from rear isn't another lost piece left for me by PO. At front right I have replaced/repaired; wiper fluid pump, wiper fluid reservoir neck, head light, fender well liner, and found a broken plastic clip and 3 serious loose fender to chassis bolts. I just suspect the clunk from front right / underneath and vibration with higher speed/ hard driving are chassis/body related--subframe, floor board, rocker panel, IDK--honestly, not sure where to start....