Switching Four-Wheel Drive On And Off - Ford SUPER DUTY 2024 Owner's Manual

If there is a difference in the level of wear
among tires on the vehicle or if you install
a dissimilar spare tire on the vehicle, do not
use 4WD High or 4WD Low (if equipped)
other than to get your vehicle unstuck.
After getting your vehicle unstuck, shift to
2H by performing the following steps:
1. Come to a stop on a flat, horizontal
surface
2. Shift the transmission to park (P) for
automatic transmissions and neutral
(N) for manual transmissions.
3. Switch to two-wheel drive mode.
4. Shift the transmission to reverse (R).
5. Shift the transmission to drive (D) for
automatic transmissions and to first
gear for manual transmissions. This
ensures the transfer case system is not
trapped in place.
Note: When the system detects a spare or
worn tires and a four-wheel drive
engagement request above a designated
speed, a warning message appears in the
instrument cluster. See Four-Wheel Drive
Information Messages (page 239).
Note: In certain scenarios, where the
four-wheel drive system has difficulty
engaging, a To Engage 4x4 Slow to 3 MPH
or To Engage 4x4 Slow to 5 km/h
message could appear in the instrument
cluster.
Mechanical Shift Blocking
On four-wheel drive vehicles with a
mechanically locked four-wheel drive high
mode, the transfer case distributes torque
to the front wheels by mechanically
interlocking the front and rear driveshafts
together. Various external factors affect
shifting performance of this type of system
including, but not limited to:
• Vehicle acceleration.
• Dissimilar tire sizes.
• Steering input.
2024 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202307, DOM
Four-Wheel Drive
(If Equipped)
If the system detects a mechanical shift
blockage at speed after you select
two-wheel drive high, the message "4x4
Unable to Disengage See Manual", could
display momentarily. If this message
displays, one or more of the following
actions can relieve the mechanical shift
block:
• Momentary acceleration.
• Momentary braking.
• Bringing the vehicle to a stop.
• Shifting the transmission to neutral and
back to drive.
• Shifting the transmission to reverse
and back to drive.
• Driving the vehicle around a tight turn
at a slow speed.
Note: In certain scenarios, where the
four-wheel drive system has difficulty
engaging, a warning message appears in
the instrument cluster. See Four-Wheel
Drive Information Messages (page 239).
SWITCHING FOUR-WHEEL
DRIVE ON AND OFF
A vehicle that comes with four-wheel drive,
when selected, has the ability to use all
four wheels to power itself. This increases
traction, which may enable you to safely
drive over terrain and road conditions that
a conventional two-wheel drive vehicle
cannot.
On some four-wheel drive models, the
initial shift from two-wheel drive to
four-wheel drive while the vehicle is
moving can cause a momentary clunk and
ratcheting sound. These sounds are normal
as the front drivetrain comes up to speed
and are not cause for concern.
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