Torque Converter
Torque ConverterTorque Converter and Torque Converter Lock-Up Clutch:
The torque converter transmits engine torque hydraulically to the transmission input shaft.
The stator boosts the torque to the input shaft (approximately 85 percent difference in speed between the impeller and the turbine).
The stator is made of synthetic resin to reduce weight.
To increase the efficiency of the automatic transmission, the torque converter has an apply clutch. When the torque converter lock-up clutch is closed, the torque is transmitted directly from the crankshaft through the torque converter housing to the transmission input shaft.
The torque converter clutch is applied hydraulically by the PCM by means of the solenoid valves in the valve body in 3rd and 4th gears. Apply is dependent on the throttle position, vehicle speed and manual selector lever position.
Fluid Pump and Stator Support:
The fluid pump is a crescent gear pump and is driven directly from the crankshaft by means of drivers on the converter impeller hub. The fluid pump is bolted to the transmission housing.
The stator support is part of the fluid pump. Splines on the support locate and hold the converter stator.