RAM 2500 Truck 4WD V10-8.0L VIN W HDC (2000)
Fig. 36
The PCM energizes the overdrive solenoid during the 3-4 upshift (Fig. 35). This causes the solenoid check ball to close the vent port allowing line
pressure from the 2-3 shift valve to act directly on the 3-4 upshift valve. Line pressure on the 3-4 shift valve overcomes valve spring pressure moving
the valve to the upshift position (Fig. 36). This action exposes the feed passages to the 3-4 timing valve, 3-4 quick fill valve, 3-4 accumulator, and
ultimately to the overdrive piston.
3-4 TIMING VALVE
