RAM 2500 Truck 2WD V10-8.0L VIN W (2003)
Fluid Pump: Description and Operation
OIL PUMP
DESCRIPTION
The oil pump (Fig. 111) is located in the pump housing inside the bell housing of the transmission case. The oil pump consists of an inner and outer
gear, a housing, and a reaction shaft support.
OPERATION
As the torque converter rotates, the converter hub rotates the inner and outer gears. As the gears rotate, the clearance between the gear teeth increases
in the crescent area, and creates a suction at the inlet side of the pump. This suction draws fluid through the pump inlet from the oil pan. As the
clearance between the gear teeth in the crescent area decreases, it forces pressurized fluid into the pump outlet and to the valve body
