RAM 3500 Truck 2WD V10-8.0L VIN W MDC (1999)
Governor: Description and Operation
Governor Pressure Solenoid Valve
Fig. 4
The solenoid valve is a duty-cycle solenoid which regulates the governor pressure needed for upshifts and downshifts. It is an electro-hydraulic device
located in the governor body on the valve body transfer plate (Fig. 4).
The inlet side of the solenoid valve is exposed to normal transmission line pressure. The outlet side of the valve leads to the valve body governor
circuit.
The solenoid valve regulates line pressure to produce governor pressure. The average current supplied to the solenoid controls governor pressure. One
amp current produces zero kPa/psi governor pressure. Zero amps sets the maximum governor pressure.
The Powertrain Control Module (PCM) turns on the bans control relay which supplies electrical power to the solenoid valve. Operating voltage is 12
volts (DC). The PCM controls the ground side of the solenoid using the governor pressure solenoid control circuit.
