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136 STARTING AND OPERATING
FOUR-WHEEL DRIVE OPERATION
The driveline is equipped with a Front Axle
Disconnect (FAD) for the one-speed and
two-speed driveline. The FAD operation is fully
automated and controlled by the Drivetrain
Control Module (DTCM). It does not require any
customer input to engage. The FAD is set to
connect, disconnect and provide 4WD function
based on certain set conditions detected by the
DTCM, including but not limited to the following:
Ambient temperature
Wipers
Selec-Terrain Mode selection
Wheel-slip detection
The FAD is actuated only in 4WD HI range and
stays connected for 4WD LOW.
QUADRA-TRAC I OPERATING
I
NSTRUCTIONS /PRECAUTIONS —
I
F EQUIPPED
The Quadra-Trac I is a single-speed (HI range
only) transfer case, which enables on-demand
four-wheel drive with active torque
management. No driver interaction is required.
The Brake Traction Control (BTC) system, which
combines standard ABS and Traction Control,
provides resistance to any wheel that is slipping
to allow additional torque transfer to wheels
with traction.
NOTE:
The Quadra-Trac I system is not appropriate for
conditions where 4WD LOW range is recom-
mended Ú page 203.
QUADRA-TRAC II OPERATING
I
NSTRUCTIONS /PRECAUTIONS —
I
F EQUIPPED
The Quadra-Trac II system comes equipped with
a customer-selectable electronically operated
on-demand transfer case with active torque
management in all driveable ranges. This
transfer case provides the following operating
range positions:
4WD HI
N (NEUTRAL)
4WD LOW
When additional tractive effort and torque are
required, the 4WD LOW position can be used.
The 4WD LOW position is intended for loose,
slippery road surfaces only. Driving in the 4WD
LOW position on dry, hard-surfaced roads may
cause increased tire wear and damage to
driveline components.
When operating your vehicle in 4WD LOW, the
engine speed is approximately three times that
of the normal 4WD HI position at a given road
speed. Take care not to overspeed the engine
and do not exceed 25 mph (40 km/h).
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type, and
circumference on each wheel. Any difference
will adversely affect performance and function
of the transfer case.
Because four-wheel drive provides improved
traction, there is a tendency to exceed safe
turning and stopping speeds. Do not go faster
than road conditions permit.
21_WL_OM_EN_USC_t.book Page 136
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