F 250 4WD Pickup V8-5.4L SOHC VIN L (1999)
Torque Converter: Description and Operation
4R70W
The torque converter transmits and multiplies torque. The torque converter is a four-element device:
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impeller assembly
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turbine assembly
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reactor assembly
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clutch and damper assembly
The standard torque converter components operate as follows:
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Rotation of the converter housing and impeller set the fluid in motion.
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The turbine reacts to the fluid motion from the impeller, transferring rotation to the geartrain through the input shaft.
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The reactor redirects fluid going back into the impeller, allowing for torque multiplication.
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The clutch and damper assembly dampens powertrain torsional vibration and provides a direct mechanical connection for improved efficiency.
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Power is transmitted from the torque converter to the planetary gearsets and other components through the input shaft.
