RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Once the TCC control valve has moved to the right (Fig. 289), line pressure is directed to the tip of the switch valve, forcing the valve to the right. The
switch valve now vents oil from the front of the piston in the torque converter, and supplies line pressure to the (rear) apply side of the torque converter
piston. This pressure differential causes the piston to apply against the friction material, cutting off any further flow of line pressure oil. After the switch
valve is shuttled right allowing line pressure to engage the TCC, torque converter pressure is directed past the switch valve into the transmission cooler
and lubrication circuits.
