I red though the old posts on bleeding brakes but they did not help. I am looking for input please. My daughter showed up with a missing brake disk??? All the other disks had life?? Not sure what happened, I replace front rotors, pads, and calipers, replaced back pads and rotors, replaced master cylinder, bled like 5 or 6 times, did the circulation thing on the master cylinder, did the stop thing with loose traction to push fluid through the ABS module, bleed the module (4 lines out) still spongy, too spongy for my daughter to drive, I pumped many times to push a leak, nothing is leaking, fluid does not go low (haven't really driven more than around the block (no breaks). I am open to input. Please advise. It is an 09 4.2 2wd. thanks in advance.