RAM 1500 Van V8-5.2L VIN Y (1999)
Brake Proportioning/Combination Valve: Description and Operation
Proportioning Valve
The proportioning valve is used to balance front rear brake action at high decelerations. The valve allows normal fluid flow during moderate braking.
The valve only controls fluid flow during high decelerations brake stops, when a percentage of rear weight is transferred to the front wheels.