I have a 99 2500 5.9 4x4. The front brakes are hanging evenly n heating up bad! I replaced hub assembly, rotors, calipers, pads, master cylinder, n hydra booster. The proportioning valve seems to be working correctly from what I've learned on you tube about them. They are just barely grabbing cuz I can't feel em when I drive but they get hot n the back brakes stay cool. Any ideas or troubleshooting to trace this problem?