HEXA

TRANSMISSION

Torque Converter:

The mechanical power flow in the transmission

begins at the point of connection between the

torque converter and the engine flywheel. When

the engine is running, the torque converter cover

(pump) is forced to rotate at engine speed. As the

torque converter rotates it multiplies engine torque

and transmits it to the turbine shaft. The turbine

shaft provides the primary link to the mechanical

operation of the transmission.

The torque converter clutch has an electronically

controlled capacity clutch (ECCC). ECCC was

developed to increase range of operation of the

torque converter clutch operation to increase fuel

economy and drivability. In a torque converter with

ECCC, the pressure plate does not always fully

lock to the torque converter cover. Instead, the

pressure plate maintains a small amount of

slippage. The typical slippage range is from 20 to

50 RPM or full lockup (0 RPM slip).

Oil pump:

The fluid pump assembly (5) contains a variable

displacement vane (6) type pump, located in the

torque converter housing (1). When the engine is

cranking, torque converter pump hub, which is

keyed to the fluid rotor (2), turns rotor at cranking

speed and pressurize the hydraulic system.

Fluid from the transmission bottom pan is drawn

through the fluid filter assembly and into the fluid

pump suction fluids circuit. This fluid is then forced

to rotate around the fluid pump slide (4) to the

pump outlet port.