Proportioning Valve: 1982-92F - Disc / DrumBrand new Brake proportioning valve for the 82 92 series. As valves change with the year models.. please simple state your cars year on the check out area and we will determine the correct unit for you vehicle. GET A "PVTOOL" if you don't have one. Use of this tool prevents the inconvenience of accidentally tripping your proportioning valve during the brake bleeding process, if you don't use it in place of the fail switch during bleeding your going to