help, I have a 1988 new yorker 3.0 landau with bosch abs and 4 wheel disc brakes. the problem is the left rear caliper keeps locking up in stop/go traffic when it gets hot. shop has replaced both calipers,rotors, pads and hoses on the rear of the car and the left rear caliper still locks up any suggestions? the car is in great shape and still runs well, only 136k would really hate to junk the car because of this.