Abstract: An automotive transmission control is shown having pressure switches to sense the state of actuation of solenoid valves to provide logic signals to a microprocessor type of transmission control. The pressure switches, which sense the pressure of hydraulic fluid used to actuate the solenoid valves, use a dished shaped metallic diaphragm characterized in that the pressure-deflection curve of the center of the diaphragm has minimal hysteresis and reflects that the diaphragm is relatively stiff having a positive coefficient of pressure with increasing deflection up to and above a range of set point pressures within which the effective spring rate of the diaphragm changes with the diaphragm being relatively supple but having little or no negative coefficient of pressure.In a first embodiment a housing is shown in which a conductive lead pattern is molded in the housing with a plurality of switching stations.