545RFE Automatic Transmission (Service Information): Converter-Torque: Description: Notes

Fig 1: Torque Converter Assembly

Courtesy of DAIMLERCHRYSLER CORP.

The torque converter is a hydraulic device that couples the engine crankshaft to the transmission. The torque converter consists of an outer shell with an internal turbine (1), a stator (2), an overrunning clutch, an impeller (5), and an electronically applied converter clutch (6). The converter clutch provides reduced engine speed and greater fuel economy when engaged. Clutch engagement also provides reduced transmission fluid temperatures. The torque converter hub (3) drives the transmission oil (fluid) pump and contains an o-ring seal (4) to better control oil flow. See Fig 1.

The torque converter is a sealed, welded unit that is not repairable and is serviced as an assembly.