Transmission Oil Pump - Operation

OPERATION




Figure 1 - OIL PUMP





As the torque converter rotates, the converter hub rotates the oil pump drive gear. As the drive gear rotates both driven gears, a vacuum is created when the gear teeth come out of mesh. This suction draws fluid through the pump inlet from the oil pan. As the gear teeth come back into mesh, pressurized fluid is forced into the pump outlet and to the oil pump valves.

OIL PUMP COVER REGULATOR VALVES




Figure 2 - OIL PUMP COVER





The Primary Regulator Valve (1) controls line pressure fed to the elements.

The Secondary Regulator Valve (2) controls pressure fed from the Primary Regulator Valve to the torque converter, and controls lubrication pressure for various parts.