The torque converter is a type of hydraulic coupling, or fluid coupling, that is used to transmit rotating mechanical power in an automatic transmission. Generated by the engine, this rotating power is then transferred to a rotating driven load. However, without the torque converter’s key characteristic, none of this would be remotely possible: to multiply torque. Regular fluid coupling cannot multiply torque, but can match the rotational speed. Without torque, your vehicle would not be able to perform adequate work. But what transfers torque in a compact from (torque density) to the output shaft are planetary gear sets.
The amount of rotating power, or “turning power,” that a car has is torque. You could equate torque to the same amount of force needed to turn a socket wrench. Torque is useful when getting your car to accelerate. It is also very useful with moving heavier vehicles that need more torque, or rotating power.
Napa Service Assistant
You don’t have to be an expert to know that preventive maintenance is the best way to make sure your vehicle is running properly. Use our interactive vehicle tool to learn about the maintenance and services your NAPA AutoCare Center can provide.