I'm having a SERIOUS problem with the car "wiggling" at highway speeds. It feels like both the front and back swing right and left as I go down the road. It's kind of a slow "floating" and "swaying" feeling. At speeds around 100+ it's downright FRIGHTENING how badly it sways. You have to REALLY hold on to the wheel to keep the car going straight. Sometimes it requires counter steer, this is how bad it is. I still have the original NC-60s with fairly good tread. This is more than an out-of-round tire problem. This is a big time suspension problem. Bushings? Shocks? Control arms? I have driven cars with bad shocks before but never had the front and back sway right and left at highway speeds. I am prepared to do anything it takes to enhance its ride quality. Suggestions are requested. Thank you. Chris 3876 GIGAWAT