1. 4WD switch
2. Transfer
3. 4WD controller
4. Steering support member
5. Air pump assembly
6. Actuator
7. Axle lock clutch
8. Free axle hub
9. 4WD indicator lamp
7E-2
DIFFERENTIAL (FRONT)
4WD CONTROL SYSTEM
When the 4WD switch is turned ON by shifting the transfer shift lever, 4WD controller actuates (energizes) the air
pump assembly. Then positive pressure is sent from the air pump assembly to the actuator installed to the differen-
tial case and causes the axle lock clutch and the free axle hub in the differential case to be engaged, resulting in
the 4WD mode. Only when running in the 4WD mode, front axles are joined to differential case, and they become
free when 2WD mode is used (or when transfer shift lever is shifted to N position), thereby reducing the power loss.
