Roadmaster Estate Wagon V8-305 5.0L (1991)
Brake Vacuum Release Valve: Description and Operation
Combination Vacuum Release Valve/Converter Clutch Switch
This combination valve and switch is used on vehicles equipped with a lock-up torque converter. The vacuum release valve portion operates
identically to the release valve previously described. At the same time, the converter clutch switch contacts open and the locking clutch mechanism in the
transmission is disengaged.