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How Does it Work / Torque Converter

How a Torque Converter Works

The torque converter is designed to act as a fluid coupler that can engage and disengage with the increase and decrease of engine rpm. When the vehicle is not in motion while the engine is running the torque converter is in action. The torque converter converts fluid pressure to lock the converter output shaft. Once the shaft has locked the transmission receives engine power. At minimum engine rpm fluid pressure is low and the torque converter allows the engine to "freewheel" from the transmission.



When the converter receives the power from the engine it transfers power to the transmission. The torque converter also has the ability to multiply torque when the engine is under power by multiplying fluid pressure through a component called a stator.

Torque Converter Stator
Torque Converter Stator

The stator allows the smooth transition from standing still to motion of the vehicle. The torque converter is filled with automatic transmission fluid pumped in from the fluid pump of the transmission. There is a measured amount of heat generated by the torque converter. This is why a transmission fluid cooler is necessary, usually installed inside the engine radiator. Most torque converters are equipped with a clutch that has the ability to lock up as the vehicles reaches cruising speeds. The clutch is activated by a fluid control solenoid inside the transmission that is activated by the ECM . Transmission fluid passes through the torque converter and needs to be as clean as possible to ensure proper operation and limit malfunctions. Always observe manufacturers recommended transmission service intervals.

How Does it Work / Torque Converter

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