FORD 2013 F-150 v.2 - Manual (Page 224)

If SHIFT DELAYED PULL FORWARD is displayed in the message
center, transfer case gear tooth blockage is present. To alleviate this
condition, place the transmission in a forward gear, move the vehicle
forward approximately 5 feet (2 meters), and shift the transmission back
to neutral to allow the transfer case to complete the range shift.
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
Electronic Locking Differential (ELD) (If Equipped)
Note: The ELD is designed for off-road use only and is not intended for
use on dry pavement. Using the ELD on dry pavement will result in
increased tire wear, noise and vibration.
The electronic locking differential (ELD) is a device housed in the rear
axle which allows both rear wheels to turn at the same speed. The ELD
can provide additional traction should the vehicle become stuck. The
ELD is electronically activated by the driver and can be shifted on the fly
within the ELD operating speed range. It is intended for use in mud,
rocks, sand, or any off-road condition where maximum traction is
needed. It is not intended for use on dry pavement.
The ELD is affected by the following conditions:
• The ELD will not engage if the vehicle speed is above 20 mph
(32 km/h) in 4x2, 4x4 Auto, or 4x4 High modes.
• The ELD will not engage if the vehicle speed is above or 56 mph
(90 km/h) in 4X4 Low.
• The ELD will not engage if the accelerator pedal is pressed beyond
50% during an engagement attempt
• In 4x2, 4x4 Auto, and 4x4 High modes, the ELD will automatically
disengage at speeds above 25 mph (41 km/h) and will automatically
reengage at speeds below 20 mph (32 km/h).
• In 4L (4X4 low), the ELD will automatically disengage at speeds above
62 mph (100 km/h) and will automatically reengage at speeds below
56 mph (90 km/h).
• The AdvanceTrac system has the ability to take over control of the
ELD and disable it during driving maneuvers when necessary.
If the required conditions for ELD activation are not met when the switch
is actuated, the instrument cluster will display the appropriate information
guiding the driver through the proper ELD activation process.
Four-Wheel Drive (If Equipped) 223
2013 F-150 (f12)
Owners Guide gf, 2nd Printing, October 2012
USA (fus)