3-2 Shift Solenoid Valve Assembly

Important: The 3-2 shift solenoid valve assembly resistance should be a minimum of 9-14 ohms at 20° C (68° F), if it is operated using the pulse width modulation at a frequency of 50 Hz.

The 3-2 shift solenoid valve assembly is a pulse-width modulated solenoid that is used in order to improve the 3-2 downshift. The solenoid regulates the release of the 3-4 clutch and the 2-4 band apply.

The solenoid uses duty cycle in order to regulate the pressures that smoothly release the clutch and apply the band. The duty cycle normally is about 0% in the first gear, 90% in all other drive gears and drops during the 3-2 downshift. Throttle position, vehicle speed and the commanded gear are used to determine the duty cycle.

If a voltage fault is detected in the 3-2 shift solenoid circuit, diagnostic trouble code 066 will set.