Torque Converter Component Description - GF27.20-D-2010H
Transmission 722.6 in MODEL 906.111/113/131/133/135/153/155/211/213/231/233/235/253/255/611/613/631/633/635/637/653/655/657/711/713/731/733/735
Location
The torque converter is bolted to the driven plate in the torque converter housing.
Task
When the vehicle is stationary and at idle speed the torque converter reduces the power flow between the engine and automatic transmission to a minimum and when starting off it causes engine torque multiplication as well as continuous rotational speed compensation and torque compensation.
Design
The impeller is connected to the engine, the turbine wheel is connected to the transmission input shaft. The stator is connected to the transmission housing via a freewheel and the stator shaft.
The impeller delivers oil through the impeller blades as a result of centifugal force outwards to the turbine wheel and drives it. The turbine wheel blades direct the oil onto the blades of the stator, which in turn pushes the oil to the impeller. A torque increase occurs due to this reversal at the stator which is supported against the transmission housing via the freewheel. Torque conversion reaches its highest value when the RPM difference between the impeller and turbine wheel is at a maximum.
As of this operating condition, also called the coupling point, the stator turns with the impeller and the turbine wheel.
The oil in the torque converter is continuously exchanged so that heat generated during the operating phase can be drawn away by the transmission oil cooler.
The converter has an oil drain screw for the transmission oil change.