I had a sticky caliper, so I replaced both of them plus new pads. It is still dragging a little. I only notice it after everything is warmed up. The truck will stop on a dime and give you nine cents change when the pads and rotors are cold but they soon glaze over and fade. I lost the spring that attaches to the brake pedal while installing a booster. Is the weight of the brake pedal enough to make them drag?