Navigator 2WD V8-5.4L (2007)
Torque Converter: Description and Operation
6HP26 Automatic Transmission
Torque Converter
The torque converter is a 3-element unit containing a dual-plate clutch. The clutch can be controlled and engaged in any gear 1st to 6th. Calibration
parameters may be set to allow lock-up 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 3 elements:
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Impeller assembly
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Turbine assembly
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Reactor 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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Power is transmitted from the torque converter to the planetary gearsets and other components through the input shaft.
Torque Converter Clutch
The torque converter clutch is a device that reduces slip in the torque converter and, therefore, helps to keep fuel consumption to a minimum.
The torque converter clutch is engaged and released by the control system.
Pressure at the torque converter clutch piston is determined by an electronic pressure control valve.
