F 150 4WD V8-4.6L VIN 8 (2010)
Torque Converter: Description and Operation
6R80
Torque Converter
The torque converter is a 4-element unit containing a 3-plate clutch. The clutch can be controlled and engaged in any gear 2 to 6. Calibration parameters
may be set to allow lockup in a higher gear only. The clutch is applied by removing fluid pressure from one side of the plate. The torque converter
transmits and multiplies torque. The torque converter includes the following 4 elements:
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Impeller assembly
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Turbine assembly
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Reactor assembly
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Torque Converter Clutch (TCC)
Rotation of the torque converter housing and impeller set the transmission fluid in motion by driving the impeller blades and pump.
The turbine is driven by the transmission fluid from the impeller and transmits power to the input shaft.
The reactor redirects transmission fluid flow returned from the turbine to the impeller so that it rotates in the same direction as the impeller. This action
assists in torque multiplication.
The reactor has a One-Way Clutch (OWC) to hold it stationary during torque multiplication and allows it to rotate at higher vehicle speeds.
Torque Converter Operation
Torque Converter Clutch (TCC)
The TCC has a cover assembly with a 3-plate clutch and a turbine and damper assembly that connects to the transmission input shaft.
The TCC connects the cover to the turbine when the TCC is applied.
During TCC release, transmission fluid flows through the torque converter in one direction to release the 3-plate clutch.
