In a transmission with a torque converter, which drives the transmission oil pump gears?

In a transmission with a torque converter, which drives the transmission oil pump gears?

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

Answer: (C)

The transmission oil pump is driven by the pump drive hub, which is located at the torque converter input and tied to the transmission input shaft. As the engine turns, the pump drive hub rotates and drives the oil pump gears inside the transmission, providing the hydraulic pressure needed for clutches and bands. The impeller is the part of the torque converter that moves fluid to transfer torque, not to drive the pump gears. The turbine is driven by that fluid and then transmits power to the transmission input shaft. The driveshaft simply carries power from the transmission to the wheels and does not drive the oil pump gears.

The transmission oil pump is driven by the pump drive hub, which is located at the torque converter input and tied to the transmission input shaft. As the engine turns, the pump drive hub rotates and drives the oil pump gears inside the transmission, providing the hydraulic pressure needed for clutches and bands.

The impeller is the part of the torque converter that moves fluid to transfer torque, not to drive the pump gears. The turbine is driven by that fluid and then transmits power to the transmission input shaft. The driveshaft simply carries power from the transmission to the wheels and does not drive the oil pump gears.