2013 SSANGYONG TURISMO 4WD

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1. OVERVIEW
The axle is the device of transferring the drive power from the engine to the wheels; its inside is fitted to
the side gear spline of the differential gear and outside is connected to the drive wheels. The axles in
front and rear of vehicle are known as the front axle and rear axle respectively.
For the FR (Front engine, Rear wheel drive) type vehicle driven by the rear wheels, the drive power is
basically transferred to the rear wheels in the following order in 2WD mode: Engine-
>Clutch→Transmission→Propeller shaft (Rear propeller shaft)→Final reduction gear (Rear
axle)→Rear axle shaft→Rear wheels. In 4WD mode, the drive power to the rear wheels is
distributed to the front wheels in order of Front propeller shaft->Front axle->Front axle shaft->Front
wheel via the T/C assembly. And, 4WD solenoid valve releases the vacuum and engage the locking
hub actuator to the LH/RH front hub end gear to transfer the drive power of the axle shaft to the front
wheels.
The front axle and front axle shaft are used in only 4WD model. The rear axle has the independent
rear drive axle (IRDA) which is used on the independent rear suspension (IRS).
Front axleTransmission
Transfer case
Front propeller shaft Rear propeller shaftRear axle

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2. Power Flow
Power Transfer Process in Axle System at 4WD and 2WD Modes ▶
The vehicle is usually driving in 2WD mode but, if the driver operates, the drive power is distributed to
the front wheels rather than rear wheels via the transfer case only in 4WD mode in following order:
Front propeller shaft->Front axle->Front axle shaft->Front wheel.
Refer to "CHASSIS T/C" section for detailed information for 4WD drive.
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Side View Rear View
1. OVERVIEW
By using the planetary gear sets, two-gears shift type part time transfer case achieves direct
connection when selecting 4WD "HIGH" and 2.48 of reduction gear ratio when selecting 4WD
"LOW". The silent chain in transfer case transfers the output power to front wheels.
The simple operation of switches on instrument panel allows to shift between "2H" and "4H" easily
while driving (for 4L: stop vehicle first). The warning lamp warns the driver when the system is
defective.

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Operation ▶
Description Mode Conditions
Driving mode 2H 2 Wheel drive
(rear wheel)Rear-wheel drive mode. This is used under normal
or high-speed driving conditions on public roads or
highways.
4H 4 Wheel drive
(high speed)This is used under sandy, muddy or snow-covered
road conditions
4 L 4 Wheel drive
(low speed)This is used for maximum traction.
When cornering with low speed in 4WD condition,
there could be tire dragging, some
mechanical shocks and resistances in vehicle’s
drive train. These are normal conditions due to
internal resistance in the drive train when the
4WD system is properly working
Mode change2H ↔
4H 2 Wheel drive
↔4 Wheel driveShifting is possible while driving at the speed of
70 km/h or less
2H, 4H
↔ 4L 2 Wheel drive,
4 Wheel drive
(high speed)
↔4 Wheel drive
(low speed)
To make the mode change easily, stop the
vehicle on level ground and turn the mode
switch to the desired position and move the
shift lever to "N"-"R"-"N" while depressing the
brake pedal. For Automatic Transmission:
Stop the vehicle on level ground and move the
gear selector lever into the “N”
position. Turn
the switch to the desired position. -
For Manual Transmission:
Stop the vehicle on level ground and move the
gear selector lever into the “N” position.
Then turn the switch to the desired position
while depressing the clutch pedal. -

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2. 4WD SYSTEM COMPONENTS
Front axle Exterior components ▶
4WD solenoid valve
Hub & locking hub
Actuator
T/C assemblyT/C control motor
assembly
Front propeller
shaft
Rear axle
Rear propeller
shaft

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Interior Components ▶
4WD Switch assembly Warning & Indicator Lamp for 4WD
TCCU

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(2) Vacuum System Related to 4WD
In 4WD mode, the TCCU blocks the
transferring of vacuum pressure from
vacuum pump to locking hub by supplying
the power to solenoid valve.Check valve
This valve allows the vacuum pressure to
flow through it in only one direction. This
prevent the vacuum from abruptly
releasing due to faulty vacuum pump.
4WD:
The vacuum pressure is released from the hub
actuator. At this time, the front hub end gear is
engaged.2WD:
The vacuum pressure pulls in the locking hub
actuator so that it will not be engaged with the
front end hub gear.
Vacuum solenoid valve
To atmosphere Block the vacuum
pressure
Hub actuator (RH)
Gear disengagedGear engaged

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2) 4H Mode (4 Wheel Drive - High Speed)
Power Flow ▶
The driving force is pass through 4WD High magnetic clutch in transfer case and is distributed
on front wheels and rear wheels (50;50).