I have a 99 vette C5 with 28k, purchased last year. When I go out for short rides around town and I use my brakes frequently, the brake pedal loses its free travel and all four wheels lock up, as if I had the brakes on. I checked the rotars and they are all too to hot to touch, meaning all 4 calibers are locked. When I let the car cool down a half hour or so, the car is fine again. If I am on a long ride and do not use my brakes as often, this problem does not happen. If anyone knows of this problem and how to correct it please contact me at cam99vette@aol.com.. Thank you- Charlie