1. Oil Pump

A: Construction





The trochoid pump is housed in the oil pump housing. It consists of a inner rotor (9 teeth), outer rotor (10 teeth) and oil pump cover.

B: Function
- The Automatic Transmission Fluid (ATF) is drawn through the oil strainer mounted under the control valve ASSY, and is routed to the transmission case, to the oil pump housing, and to the oil pump cover. It then goes to the suction port.
- As the inner rotor rotates, the outer rotor also rotates. This motion causes ATF to be sucked up through the suction port and discharged under pressure from the discharged port.
- The discharged ATF flows from the oil pump cover to the oil pump housing. It then goes to the transmission case, the control valve and to the regulator valve, thus serving as hydraulic oil and lubricating oil for the torque converter clutch, valves, clutch.





- As engine speed increases, the delivery rate of the trochoid pump also increases.