2011 FORD SUPER DUTY differential

AdvanceTrac/Traction control
(if equipped):Displays when the
AdvanceTrac/Traction control is
active. If the light remains on, have
the system serviced immediately,
refer to theDrivingchapter for more information.
AdvanceTrac/Traction control
off light (if equipped):Illuminates
when AdvanceTrac/Traction control
has been disabled by the driver.
Refer to theDrivingchapter for
more information.
4X2 (RTT) (if equipped):
Displays momentarily when
two-wheel drive high is selected. If
the light fails to display when the
ignition is turned on, or remains on,
have the system serviced immediately by your authorized dealer.
Four wheel drive low (RTT and
static) (if equipped):Displays
when four-wheel drive low is
engaged. If the light fails to display
when the ignition is turned on, or remains on, have the system serviced
immediately by your authorized dealer.
Four wheel drive high (RTT and
static) (if equipped):Displays
when four-wheel drive high is
engaged. If the light fails to display
when the ignition is turned on, or remains on, have the system serviced
immediately by your authorized dealer.
Electronic locking differential
(RTT and static) (if equipped):
Displays when using the electronic
locking differential.
OFF
4x2
4x4
LOW
4x4
HIGH
Instrument Cluster
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USA(fus)

TBC GAIN = XX.X NO TRAILER (if equipped)— Displays the
current gain setting for the trailer brake when a trailer is not connected.
Refer toTrailer towingin theTires, Wheels and Loadingchapter for
more information.
TRAILER DISCONNECTED (if equipped)— Displayed and
accompanied by a single chime when a trailer connection becomes
disconnected, either intentionally or unintentionally, and has been sensed
during a given ignition cycle. Refer toTrailer towingin theTires,
Wheels and Loadingchapter for more information.
TRAILER SWAY REDUCE SPEED (if equipped)— Displayed when
the trailer sway control has detected trailer sway. For more information,
refer to theDrivingchapter for more information.
CHECK PARK AID (if equipped)— Displayed when the transmission
is in R (Reverse) and the reverse sensing system (park aid) is disabled.
CHECK LOCKING DIFFERENTIAL (if equipped)— Displayed
when an electronic locking differential (ELD) system fault is present. For
more information, refer toElectronic locking differential (ELD)in the
Drivingchapter.
CHECK 4X4 (if equipped)— Displayed when a 4X4 system fault is
present. For more information, refer toFour-wheel drive (4WD)
operationin theDrivingchapter.
4X4 SHIFT IN PROGRESS— Displayed when the 4X4 system is
making a shift. For further information, refer toFour-wheel drive
(4WD) operationin theDrivingchapter.
FOR 4X4 LOW SLOW TO 3 MPH (if equipped)— Displayed when
4X4 LOW is selected while the vehicle is moving. For more information,
refer toFour-wheel drive (4WD) operationin theDrivingchapter.
FOR 4X4 LOW APPLY BRAKE (if equipped)— Displayed when
trying to select 4X4 LOW. For more information, refer toFour-wheel
drive (4WD) operationin theDrivingchapter.
FOR 4X4 LOW SHIFT TO N (if equipped)— Displayed when 4X4
LOW is selected and the vehicle is stopped. For more information, refer
toFour-wheel drive (4WD) operationin theDrivingchapter.
TO EXIT 4X4 LOW SLOW TO 3 MPH (if equipped)— Displayed
when 2WD is selected while the vehicle is operating in 4X4 LOW. For
more information, refer toFour-wheel drive (4WD) operationin the
Drivingchapter.
TO EXIT 4X4 LOW SHIFT TO N (if equipped)— Displayed when
2WD is selected while the vehicle has been stopped in 4X4 LOW. For
more information, refer toFour-wheel drive (4WD) operationin the
Drivingchapter.
Instrument Cluster
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•10 Minutes.
•30 Minutes.
•Last 5 Resets.
Use the up/down arrows keys to highlight one of the choices; press and
hold OK to set your choice.
The graph is updated each minute with the fuel economy that was
achieved during the prior 5, 10, 30 minutes or last 5 resets of driving.
Truck Apps (if equipped)
In this mode, off-road and trailer towing application options are available.
Off Road
Pitch and bank angle (in degrees) (if equipped). Displays the pitch
angle (front to rear) and bank angle (side to side) of the road surface.
Steering angle (in degrees). Displays the steering angle of the front
wheels.
Differential lock/unlock. Displays the state (locked or unlocked) of the
electronic locking differential.
Energy flow. Displays the operating mode of the transfer case: 4X2,
4X4 Low or 4X4 High.
When “Press OK for info” is displayed, pressing OK will give you
information on the following options (Note:Information is only available
when traveling less than 3 mph [5 km/h]):
•ELD (electronic locking differential)
•Hill Descent Control
•4X4 System
•Traction Control
Trailer:Press the right arrow key (when in the Off Road menu) to
reach the Trailer menu. The following information is displayed
•Active trailer name or default trailer.
•Accumulated trailer distance.
•Trailer gain and output.
•Trailer disconnected
Instrument Cluster
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TO EXIT 4X4 LOW SHIFT TO N (if equipped)— Displayed when
2WD is selected while the vehicle has been stopped in 4X4 LOW. For
more information, refer toFour-wheel drive (4WD) operationin the
Drivingchapter.
TO EXIT 4X4 LOW SLOW TO 3 MPH (if equipped)— Displayed
when 2WD is selected while the vehicle is operating in 4X4 LOW. For
more information, refer toFour-wheel drive (4WD) operationin the
Drivingchapter.
FOR HILL DESCENT REDUCE SPEED (if equipped)— Displayed
when the vehicle speed requirement for off-road mode entry has not
been met.
FOR HILL DESCENT SELECT GEAR (if equipped)— Displayed
when the driver is able to select a transmission gear for hill descent
mode.
HILL DESCENT - DRIVER RESUME CONTROL (if equipped)—
Displayed when hill descent control mode is deactivated and the driver
must resume control.
HILL DESCENT CONTROL FAULT (if equipped)— Displayed when
a hill descent system fault is present.
HILL DESCENT CONTROL OFF (if equipped)— Displayed when
hill descent control mode becomes inactive.
HILL DESCENT CONTROL OFF SYSTEM COOLING (if equipped)
— Displayed when the hill descent system is cooling due to overuse.
HILL DESCENT CONTROL READY (if equipped)— Displayed
when the hill descent control switch is turned on.
REDUCE ACCELERATOR TO PREVENT WHEEL SLIP (if
equipped)— Displayed when the vehicle senses that torque to the
drive wheels has overcome the available traction.
SHIFT DELAYED PULL FORWARD (if equipped)— May display
when shifting to or from 4X4 LOW. For more information, refer to
Four-wheel drive (4WD) operationin theDrivingchapter.
SLOW VEHICLE TO XX KM/H FOR ELD (if equipped)— Displayed
when the vehicle speed requirement for the electronic locking
differential mode has not been met.
SLOW VEHICLE TO XX MPH FOR ELD (if equipped)— Displayed
when the vehicle speed requirement for the electronic locking
differential mode has not been met.
Instrument Cluster
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CHECK LOCKING DIFFERENTIAL (if equipped)— Displayed
when an electronic locking differential (ELD) system fault is present. For
more information, refer toElectronic locking differential (ELD)in the
Drivingchapter.
CHECK SPEED DRIVE SAFELY— Displayed when a MyKey™ is in
use and the optional setting is on and the vehicle exceeds a preselected
speed. Refer toMyKey™in theLocks and Securitychapter for more
information.
COULD NOT PROGRAM INTEGRATED KEY— Displayed when an
attempt is made to program a fifth integrated key to the remote keyless
entry system. For more information on integrated key, refer to theLocks
and Securitychapter.
ESC ALWAYS ON - MYKEY SETTING— Displayed when a MyKey™
is in use and the ESC cannot be deactivated. Refer toMyKey™in the
Locks and Securitychapter for more information.
MYKEY ACTIVE DRIVE SAFELY— Displayed when a MyKey™ is in
use. Refer toMyKey™in theLocks and Securitychapter for more
information.
MYKEY COULD NOT PROGRAM— Displayed when an attempt is
made to program a spare key using two existing MyKeys. Refer to
MyKey™in theLocks and Securitychapter for more information.
SECURITY SYSTEM FAULT (if equipped)— Displayed when the
security system has detected a fault. See your authorized dealer for
service.
SPEED LIMITED TO 130 KM/H— Displayed when starting the
vehicle and MyKey™ is in use and the MyKey speed limit is on. Refer to
MyKey™in theLocks and Securitychapter for more information.
SPEED LIMITED TO 80 MPH— Displayed when starting the vehicle
and MyKey™ is in use and the MyKey speed limit is on. Refer to
MyKey™in theLocks and Securitychapter for more information.
VEHICLE AT TOP SPEED - MYKEY SETTING— Displayed when a
MyKey™ is in use and the MyKey speed limit is on and the vehicle
speed is 80 mph (130 km/h). Refer toMyKey™in theLocks and
Securitychapter for more information.
VEHICLE NEAR TOP SPEED— Displayed when a MyKey™ is in use
and the MyKey speed limit is on and the vehicle speed is approaching
80 mph (130 km/h). Refer toMyKey™in theLocks and Security
chapter for more information.
CHECK REAR PARK AID (if equipped)— Displayed when the
transmission is in R (Reverse) and the park aid is disabled.
Instrument Cluster
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•loose or worn steering components
•improper steering alignment
If any steering components are serviced or replaced, install new
fasteners (many are coated with thread adhesive or have prevailing
torque features which may not be re-used). Never re-use a bolt or nut.
Torque fasteners to specifications inWorkshop Manual.
A high crown in the road or high crosswinds may also make the steering
seem to wander/pull.
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. It provides
added traction on slippery and/or off road surfaces, particularly when
one wheel is on a poor traction surface. The ELD may be locked or
unlocked by the vehicle operator and can be engaged or disengaged on
the fly. When the axle is unlocked it will function like a standard rear
axle. When the axle is locked it will not allow the rear wheels to rotate
at different speeds when turning. It is not recommended for use on good
traction surfaces such as dry pavement. Doing so may result in abnormal
driving behavior and noise while cornering and excessive tire wear.
The ELD is affected by the following conditions of your vehicle:
•On 2WD vehicles and 4WD vehicles in 2H (4X2) or 4H (4X4 High),
the ELD will not engage if the vehicle speed is above 25 mph
(40 km/h).
•On 2WD vehicles and 4WD vehicles in 2H (4X2) or 4H (4X4 High),
the ELD will automatically disengage at speeds above 25 mph
(40 km/h) and will automatically reengage at speeds below 19 mph
(30 km/h).
•On 4WD vehicles in 4L (4X4 Low), the ELD can be engaged at any
speed and will not automatically disengage.
Activating the electronic locking differential (ELD)
For vehicles equipped with an
electronic shift 4WD system:
Pull the knob on the 4WD control
toward you. The
indicator light
will display in the instrument
cluster.
Driving
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For 2WD vehicles and vehicles
equipped with a manual shift
4WD system:
Turn the control to ON. The
indicator light will display in the
instrument cluster.
Once the
light is displayed in the instrument cluster, both rear wheel
axle shafts will be locked together providing added traction.
If the
indicator light in the instrument cluster turns off, one of the
following has occurred:
•The vehicle speed is too high.
•The left and right rear wheel speed difference is too high during an
engagement attempt.
•The system has malfunctioned and will be accompanied by the
CHECK LOCKING DIFFERENTIAL message in the message center.
See your authorized Ford dealer for assistance.
Note:The ELD may have difficulty disengaging either by operator
command or automatically if the driveline is under torque. If driving
conditions allow, releasing the accelerator pedal or turning the steering
wheel in the opposite direction may assist in disengagement.
Note:The ELD is designed for off-road use only and is not intended for
use on dry pavement.
PREPARING TO DRIVE
WARNING:Utility vehicles have a significantly higher rollover
rate than other types of vehicles.
WARNING:In a rollover crash, an unbelted person is
significantly more likely to die than a person wearing a seat belt.
Utility vehicles and trucks have larger tires and increased ground
clearance, giving the vehicle a higher center of gravity than a passenger
car.
Driving
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•Front driver side (4x4)
Note:Make sure the jack fits onto
the flat area on the outboard side of
the differential.
•Front passenger side (4x4)
Note:View shown from the rear of
the vehicle to clearly identify the
jack point. Place the jack directly
under the axle.
•Rear
Roadside Emergencies
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