Torque Converter

Role of the torque converter

• Multiplies torque generated by the engine.
• Serves as an automatic clutch which transmits engine torque to the transmission.
• Absorbs torsional vibration of the engine and drivetrain.
• Smoothes out engine rotation.
• Drives the oil pump of the hydraulic control system.

Drum Assembly

Role of drum/clutch assemblies

Clutches:

• Holds two rotating components together so that they turn in the same direction at the same speed.

 

Brakes:

• Hold planetary components to the transmission case so they cannot turn in either direction.
• Can also be used to hold a one-way clutch race to provide an additional state of one-way clutch operation.

 

One-way Clutches:

• Holds planetary components locked in one direction for allowing free rotation in the opposite direction.