I need help. I have a 1999 C2 996, with only 35,000miles. It is making a klunking noise that seems to be coming from the right front of the car. This occurs when you go over a bump. Local mechanice changed the drop links and also put in a new strut. Still the klunk is there. It only seems to happen after the car has been driven for some miles. If it is cold it takes longer to klunk. Any suggestions.