FORD 2011 F-150 v.1 - Manual (Page 311)

Note: Do not use 4H (4X4 high) on dry, hard surfaced roads. Doing so
will produce excessive noise, increased tire wear and may damage drive
components. 4H (4X4 High) is only intended for consistently slippery or
loose surfaces. Use of 4H (4X4 High) on these surfaces may produce
some noise (such as occasional clunks), but will not damage drive
components.
Shifting between 2H (4X2) and AWD (auto) or 4H (high)
Move the control from the 2H position to the AWD or 4H position at a
stop or while driving at any forward speed. The message center may
display
Љ4X4 SHIFT IN PROGRESSЉ during the system shift. The message
center will then display “AWD” if AWD has been selected or “4X4 high” if
4H is selected. The message center will momentarily display “4X2” if 2H
has been selected.
Note: 4X4 high mode is not intended for use on dry pavement
Shifting between AWD (auto) and 4H (high)
Move the control from AWD to 4H at a stop or while driving at any
speed. The message center will display “AWD” if AWD has been selected
and “4X4 high” if 4H has been selected
Note: 4X4 high mode is not intended for use on dry pavement
Electronic locking differential (ELD) (if equipped)
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. 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 4WD control must be in either 4H (4X4 high) or 4L (4X4 low)
mode.
• The ELD will not engage if the vehicle speed is above 20 mph
(30 km/h) in 4X4 high or 56 mph (90 km/h) in 4X4 low.
• In 4H (4X4 high), the ELD will disengage at speeds above 25 mph
(40 km/h) and will automatically reengage at speeds below 20 mph
(30 km/h).
• In 4L (4X4 low), the ELD will disengage at speeds above 62 mph
(100 km/h) and will automatically reengage at speeds below 56 mph
(90 km/h).
Driving
311
2011 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)