Proportioning Valve
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 Dodge Intrepid, 2004 Chrysler Intrepid, 2004 Chrysler Concorde, 2004 Chrysler 300M, and 2003 Dodge Intrepid. However, it is still accessible from the selected car via links, so may be relevant.
Two proportioning valves are used on each vehicle without antilock brakes. One valve is used for each rear brake hydraulic circuit. The valves are not serviceable and must be replaced as part of the junction block.