Dakota 2WD L4-2.5L VIN P (2001)
The pressure regulator valve is needed to control the hydraulic pressure within the system and reduce the amount of heat produced in the fluid. The
pressure regulator valve is located in the valve body near the manual valve. The pressure regulator valve train controls the maximum pressure in the
lines by metering the dumping of fluid back into the sump. Regulated pressure is referred to as "line pressure." The regulator valve (Fig. 264) has a
spring on one end that pushes the valve to the left. This closes a dump (vent) that is used to lower pressure. The closing of the dump will cause the oil
pressure to increase. Oil pressure on the opposite end of the valve pushes the valve to the right, opening the dump and lowering oil pressure. The
result is spring pressure working against oil pressure to maintain the oil at specific pressures. With the engine running, fluid flows from the pump to
the pressure regulator valve, manual valve, and the interconnected circuits. As fluid is sent through passages to the regulator valve, the pressure pushes
the valve to the right against the large spring. It is also sent to the reaction areas on the left side of the throttle pressure plug and the line pressure plug.
With the gear selector in the PARK position, fluid recirculates through the regulator and manual valves back to the sump.
