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Note: The AdvanceTrac® with RSC® stability
enhancement system can be switched off
by deselecting the feature in the cluster
menu. See Using Traction Control (page
231). This disables the engine management
feature, allowing the vehicle to maintain full
power and enhanced momentum through
the obstacle.
Note: The AdvanceTrac system can take
control of the transfer case clutch and
disable it during driving maneuvers when
necessary.
Your vehicle engages 4X4 modes based on
the currently selected Drive Mode. See
Drive Mode Control (page 284).
Note: The information display could show
messages during 4WD operation. See
Information Messages (page 125).
2H - 4X2
2H turns on when you select NORMAL or
CONSERVE. Power is delivered to the rear
wheels only. This mode is appropriate for
normal on-road driving on dry pavement and
provides the best fuel economy.
4A - 4X4 Auto
4A turns on when you select EXCITE,
NORMAL 4x4 AUTO or SLIPPERY. It
provides electronically controlled four-wheel
drive with power delivered to all four wheels,
as required, for increased traction. 4A is
calibrated in conjunction with Drive Mode.
4A in EXCITE is less aggressively tuned and
is appropriate for dry road surfaces. 4A in
NORMAL 4x4 AUTO is appropriate for all
on-road driving conditions, such as dry road
surfaces, wet pavement, light snow or gravel.
4A in SLIPPERY is more aggressively tuned
and is appropriate for slippery surfaces, such
as light snow or gravel.
4H - 4X4 High
4H turns on when you select DEEP
CONDITIONS. It provides electronically
locked four-wheel drive power to both the
front and rear wheels for use in off-road or
winter conditions such as deep snow, sand
or mud. This mode is not for use on dry
pavement.
4L - 4X4 Low
4L turns on when you select SLOW CLIMB.
It provides electronically locked four-wheel
drive power to both the front and rear wheels
for use on low traction surfaces, but does so
with additional gearing for increased torque
multiplication. Intended only for off-road
applications such as deep sand, steep
grades or pulling heavy objects. 4L does not
engage when your vehicle is moving above
3 mph (5 km/h); this is normal and should be
no reason for concern.
Shifting Between 4WD System Modes
Note: Momentarily releasing the accelerator
pedal when a shift in progress message
displays improves engagement and
disengagement performance.
Note: Do not perform this operation if the
rear wheels are slipping.
Note: You may hear some noise as the
system shifts or engages; this is normal.
217
Navigator (TB9) Canada/United States of America, enUSA, Edition date: 201808, First-Printing
Four-Wheel Drive (If Equipped)
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