Know people say our TBs brakes are a bit spongy but we have 3 TBs in the family and all 3 had great brake pedal feel till mine developed a problem. I had my pedal go to the floor so I started replacing pads, rotors, fluid, and master cylinder. The truck will stop but not in a predictable manner. I can not lock up the rear wheels or even get the ABS to take over, and if I hit the brakes 2 times in a second or 2 the second brake pedal feel is hard but truck does not want to stop. Any help would be appreciated.