Which is a characteristic of an automatic transmission torque converter?

An automatic transmission torque converter is primarily responsible for transferring power between the engine and the transmission. This component functions as a fluid coupling, allowing the engine to maintain a certain level of power delivery while the vehicle is stationary or in motion. It utilizes a turbine and a pump to fluidly connect the engine and the transmission, enabling the vehicle to smoothly accelerate without needing to disengage the engine from the transmission, as would be the case with a manual clutch system.

The torque converter also helps to multiply engine torque during acceleration, making it an essential part of the automatic transmission system. This efficiency in power transfer contributes to the smooth operation of the vehicle in various driving conditions. Additionally, its design incorporates moving parts, specifically the turbine and impeller, which facilitate this power transfer, distinguishing it from options that suggest it lacks movement or requires manual operation.