When installed in the transmission, what drives the transmission oil pump gears?

When installed in the transmission, what drives the transmission oil pump gears?

• A. Impeller
• B. Driveshaft
• C. Pump drive hub
• D. Turbine

Answer: (C)

The transmission oil pump gears are driven by the pump drive hub. This hub sits on the transmission input shaft and directly engages the oil pump gears, turning them to circulate hydraulic fluid. The engine’s power reaches the input shaft through the torque converter, but the impeller and turbine are parts of the torque converter’s fluid circulation and torque multiplication, not the direct drive for the oil pump. The driveshaft is outside the transmission and isn’t involved in driving the internal pump gears.

The transmission oil pump gears are driven by the pump drive hub. This hub sits on the transmission input shaft and directly engages the oil pump gears, turning them to circulate hydraulic fluid. The engine’s power reaches the input shaft through the torque converter, but the impeller and turbine are parts of the torque converter’s fluid circulation and torque multiplication, not the direct drive for the oil pump. The driveshaft is outside the transmission and isn’t involved in driving the internal pump gears.