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Note: 4x4 low mode is not intended for use
on dry pavement.
1. Bring the vehicle to a speed of 3 mph
(5 km/h) or less.
2. Place the transmission in neutral (N).
3. Move the 4WD control to the preferred
position.
The information display will display a
message indicating a 4X4 shift is in
progress. The information display will then
display the system mode selected. If any
of the above shift conditions are not met,
the shift will not occur and the information
display will display information guiding the
driver through the proper shifting
procedures.
If a message in the information display
shows a Shift Delayed Pull Forward
message, a transfer case gear tooth
blockage is present. To alleviate this
condition, place the transmission in a
forward gear, move the vehicle forward
approximately 5 ft (1.5 m), and shift the
transmission back to neutral to allow the
transfer case to complete the range shift.
Entering and Exiting Rock Crawl
Mode with Tremor Package (If
Equipped)
E225315
• To enter rock crawl, your vehicle must
be in 4x4 low.
• Press the drive mode button on the
shifter column to bring up the
information display and select rock
crawl mode.
• With the switch in 4x4 low position,
press rock crawl mode again to
deactivate it.
• You can now perform a shift out of 4x4
low.
• Refer to Shifting to or from 4L (4x4
low) as described previously for proper
operation of 4x4 low in this procedure.
Operating 4WD Vehicles with
Spare or Mismatched Tires
On four-wheel drive vehicles, the size of
the spare tire can affect the 4X4 system.
If there is a significant difference between
the size of the spare tire and the remaining
tires, you may have limited four-wheel
drive functionality.
When driving with the full-size, dissimilar
spare wheel and tire assembly, we
recommend that you do not:
• Exceed 50 mph (80 km/h) with a 4WD
mode turned on.
• Turn on a 4WD mode unless the
vehicle is stationary.
• Use a 4WD mode on dry pavement.
When driving with the full-size, dissimilar
spare wheel and tire assembly, you may
have limited 4WD functionality, especially
when driving in a mechanically locked 4WD
mode. You may experience the following:
• Additional noise from the transfer case
or other drive components.
• Difficulty shifting out of a mechanically
locked 4WD mode.
Use of a dissimilar spare wheel and tire
assembly may lead to impairment of the
following:
• Comfort and noise.
• Winter weather driving capability.
• Wet driving capability.
• Four-wheel drive capability.
209
Super Duty (TFE), enUSA, Edition date: 201909, Third-Printing-
Four-Wheel Drive (If Equipped)
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