Transmission
9803/3280 Issue 1
27 - 4 27 - 4
Systems Description
Section F Section F
Synchro Shuttle Gearbox
2/4 Wheel Drive Clutch Operation
- Spring ON/Pressure OFF Type (cont’d)
2 Wheel Drive Operation
When the switch is in the 2 wheel drive position,
solenoid valve A is energised. The energised
solenoid A1 causes the valve spool to move and
form a connection between ports 3 and 2.
Pressurised oil is directed to piston C via ports 3
and 2. The piston moves actuating sleeve F and
then pressure plate G against the force of springs
D, thus releasing the spring force on the clutch
friction/counter plates of clutch pack B.
Because there is no spring force, the
friction/counter plates of clutch pack B now freely
rotate on the output shaft, thus disengaging drive
to the front axle.
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