RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Torque Converter: Description and Operation
45RFE 4 Speed
45RFE - Automatic Transmission
TORQUE CONVERTER
DESCRIPTION
The torque converter (Fig. 117) is a hydraulic device that couples the engine crankshaft to the transmission. The torque converter consists of an outer
shell with an internal turbine, a stator, an overrunning clutch, an impeller and an electronically applied converter clutch. The converter clutch provides
reduced engine speed and greater fuel economy when engaged. Clutch engagement also provides reduced transmission fluid temperatures. The converter
clutch engages in third gear. The torque converter hub drives the transmission oil (fluid) pump and contains an O-ring seal to better control oil flow.
The torque converter is a sealed, welded unit that is not repairable and is serviced as an assembly.
CAUTION: The torque converter must be replaced if a transmission failure resulted in large amounts of metal or fiber contamination in the fluid. If the
fluid is contaminated, flush the fluid cooler and lines.
