RAM 2500 Van V8-5.2L Prop VIN 2 (2000)
By adjusting the spring pressure acting on the regulator valve, transmission line pressure can be adjusted.
OPERATION
NOTE: Refer to the Hydraulic Schematics for a visual aid in determining valve location, operation and design.
REGULATOR VALVE
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."
Fig. 22
The regulator valve (Fig. 22) 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.