The component driving the fluid inside the torque converter and attached to the shell is which?

The component driving the fluid inside the torque converter and attached to the shell is which?

• A. Turbine
• B. Impeller
• C. Lock-up clutch
• D. Stator

Answer: (B)

The impeller is the part that drives the fluid inside the torque converter and is attached to the shell. It acts as a pump powered by the engine: when it spins, it flings fluid outward, creating the flow and pressure that push against the turbine to transmit torque. The turbine is connected to the transmission input and is driven by that fluid, not the other way around. The stator sits between them to redirect fluid and improve efficiency, and the lock-up clutch is a separate mechanism that couples engine to transmission at higher speeds, not a fluid-driving component.

The impeller is the part that drives the fluid inside the torque converter and is attached to the shell. It acts as a pump powered by the engine: when it spins, it flings fluid outward, creating the flow and pressure that push against the turbine to transmit torque. The turbine is connected to the transmission input and is driven by that fluid, not the other way around. The stator sits between them to redirect fluid and improve efficiency, and the lock-up clutch is a separate mechanism that couples engine to transmission at higher speeds, not a fluid-driving component.