FORD 2014 F-550 v.3 - Manual (Page 155)

Using the Electronic Shift on the
Fly 4WD system
(If Equipped)
E163190
2H (2WD)
For general on-road driving. Sends power
to the rear wheels only and should be used
for street and highway driving. Provides
optimal smoothness and fuel economy at
high speeds.
4H (4X4 HIGH)
Used for extra traction such as in snow or
icy roads or in off road situations. This
mode is not intended for use on dry
pavement.
4L (4X4 LOW)
Uses extra gearing to provide maximum
power to all four wheels at reduced
speeds. Intended only for off-road
applications such as deep sand, steep
grades, or pulling heavy objects. 4L (4x4
low) will not engage while the vehicle is
moving above 3 mph (5 km/h); this is
normal and should be no reason for
concern. Refer to Shifting to/from 4L (4x4
low) for proper operation.
Shifting between system modes
Note: Momentarily releasing the accelerator
pedal while performing a shift will improve
engagement/disengagement times.
Note: Do not perform this operation if the
rear wheels are slipping.
Note: Some noise may be heard as the
system shifts or engages; this is normal.
Note: 4X4 high mode is not intended for
use on dry pavement.
You can move the control from 2H or 4H
at a stop or while driving. The information
display may display a message indicating
a 4X4 shift is in progress. Once the shift is
complete the message center will then
display the system mode selected.
If SHIFT DELAYED PULL FORWARD is
displayed in the information display during
the mode shift, transfer case gear tooth
blockage is present. To alleviate this
condition, place the transmission in a
forward gear and move the vehicle forward
approximately 5 feet (1.5 meters) to allow
the transfer case to complete the mode
shift.
Shifting to/from 4L (4X4 low)
Note: Some noise may be heard as the
system shifts or engages; this is normal.
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 N (Neutral).
3. Move the 4WD control to the desired
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.
152
Super Duty (TFA)
Four-Wheel Drive
(If Equipped)