Dakota 4WD V8-4.7L VIN N (2000)
determine target pressure. Actual governor pressure is read from the sensor and the difference between the target pressure and actual pressure are
used to determine duty cycle correction.
The duty cycle is the amount of time the governor pressure solenoid needs to be OFF to meet the target pressure.
Speed of the output shaft, throttle position, controller calculations, and shift lever position determine different governor pressure curves.
Governor pressures can be different at the same output shaft speed. The desired pressure is determined by many things including the acceleration
of the vehicle. There is no need for concern if at the same output shaft speed there are different requested pressures.There is a need for concern if
the target pressure and actual pressure are not within 3 psi for five seconds or more. If this occurs, the control system could result in erratic
shifting.
The only time the governor control system stays at zero is when the gear selector is in PARK, NEUTRAL, REVERSE or DRIVE with the vehicle
at a stop. When the transmission is in PARK, NEUTRAL, or REVERSE, no line pressure is supplied to the governor pressure solenoid making
governor pressure zero.
