Automatic Transmission Basics - Home | LBCC

Automatic Transmission BasicsAutomatic transmissions /Transaxles contain3 Major Components or Systems1) Torque Converter2) The Planetary Gears and holding devices4) The Hydraulic ControlsSelecting the Proper ATF is CRITICALM ixing fluids can ruin a transmissionAlways look up and use specified fluidTorque ConverterWatch animation of Torque Converter at ConverterThe Impelleris also called the PumpImpeller turns with the engine crankshaftThe Turbineis driven by the centrifugal force of the The Turbine is splined to the Transmission input shaftWhen vehicle is stopped and in gear, the impeller turns and the stator does not. Torque Converter Impeller or PumpTorque Converter TurbineStator OperationThe Stator provides Torque MultiplicationWhen the engine is running and the car is stopped, the stator will lock on the One Way ClutchThe one way clutch is splined to the Transmission oil pump cover or stator shaft that does not rotateThis provides maximum torque multiplicationAt Coupling Speed the stator will spin freely on the overrunning (one way) clutchAt coupling speed, about 10% of engine RPM is lost to ATF fluid slippageTorque Converter StatorTorque Converter StatorLocking Torque Conv

The Impeller is also called the Pump Impeller turns with the engine crankshaft The Turbineis driven by the centrifugal force of the A.T.F. The Turbine is splined to the transmission input shaft When vehicle is stopped and in gear, the impeller turns and the stator does not.

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  Basics, Pumps, Automatic, Transmissions, Automatic transmission basics

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