Torque Converter (page 3 of 4)

AUTOMATIC GEARBOX - JATCO

DESCRIPTION AND OPERATION

44-19

Unlock Condition

1 Impeller
2 Turbine
3 Lock-up clutch
4 Release pressure
5 Lock-up control valve
6 Drain port

7 Torque converter pressure
8 Lock-up solenoid
9 Fluid cooler

10 Torque converter applied pressure
11 Lubrication
12 Input shaft

The unlock release pressure is supplied via the control valve to the lock-up clutch. The pressure forces the clutch 
mechanism away from the torque converter and moves the lock-up mechanism into the unlock condition. The torque 
converter pressure is decayed to the drain port, removing the applied pressure from the torque converter, allowing 
the clutch mechanism to move.

M44 1623

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