2021 FORD F-150 Transmi

If the system detects a fault, a warning
message appears in the information
display. See Four-Wheel Drive –
Information Messages (page 299).
Shifting to or from Four-Wheel
Drive Low (4L)
To select or exit four-wheel drive low (4L):
1. Bring your vehicle to a speed of
3 mph
(5 km/h) or less.
2. Place the transmission in neutral (N).
3. Press the desired four-wheel drive button on the four-wheel drive mode
control switch.
The information display will display a
message indicating a four-wheel drive shift
is in progress. If any of the above shift
conditions are not present, the shift does
not occur and the information display will
display information guiding the driver
through the proper shifting procedures. If
there is a transfer case tooth blockage, a
message displays in the information
display. To alleviate this condition, place
the transmission in a forward gear, move
your vehicle forward approximately
5 ft
(1.5 m), and shift the transmission back to
neutral (N) to allow the transfer case to
complete the range shift.
Note: You could hear some noise as the
system shifts or engages, which is normal.
If the system detects a fault, a warning
message appears in the information
display.
See Four-Wheel Drive –
Information Messages (page 299). SELECTING A FOUR-WHEEL
DRIVE MODE
The four-wheel drive mode control is on
the instrument panel.
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To select a four-wheel drive mode, press
the four-wheel drive mode control button
of the desired mode. You can select
two-wheel drive high (2H), four-wheel
drive high (4H), or if your vehicle has
four-wheel drive auto (4A) at a stop or
while driving. Once the shift is complete,
the information display will then display
the selected four-wheel drive mode. While
shifts are in progress, the lights on the
four-wheel drive control switch can flash
and you could see messages in the
information display indicating that a shift
is in progress or to release the accelerator
pedal to improve shift performance.
Note:
Do not perform this operation if the
rear wheels are slipping or while applying
the accelerator pedal.
Note: You could hear some noise as the
system shifts or engages which is normal.
If the system detects a fault, a warning
message appears in the information
display. See Four-Wheel Drive –
Information Messages (page 299).
Shifting to or from Four-Wheel
Drive Low (4L)
To select or exit four-wheel drive low (4L):
1. Bring your vehicle to a speed of
3 mph
(5 km/h) or less.
2. Place the transmission in neutral (N)
3. Press the desired four-wheel drive button on the four-wheel drive mode
control switch.
The information display will display a
message indicating a four-wheel drive shift
is in progress. If any of the above shift
conditions are not present, the shift will
not occur and the information display will
display information guiding the driver
through the proper shifting procedures. If
there is a transfer case tooth blockage a
message will display in the information display. To alleviate this condition, place
the transmission in a forward gear, move
your vehicle forward approximately
5 ft
(1.5 m), and shift the transmission back to
neutral (N) to allow the transfer case to
complete the range shift.
Note: You could hear some noise as the
system shifts or engages which is normal.
If the system detects a fault, a warning
message appears in the information
display.
See Four-Wheel Drive –
Information Messages (page 299).
FOUR-WHEEL DRIVE MODES
TWO-WHEEL DRIVE HIGH
Two-wheel drive high is for general
on-road driving. Power is sent to the rear
wheels only.
Note: Two-wheel drive high can turn on or
off based on Drive Mode selection See Drive
Mode Control
(page 371).
FOUR-WHEEL DRIVE AUTO
(If
Equipped)
Four-wheel drive auto provides
electronically controlled four-wheel drive
power to both the front and rear wheels,
as required, for increased traction in varying
on-road conditions. The four-wheel drive
auto tuning varies based on selected Drive
Mode.
See Selecting a Drive Mode (page
373).
Note: Four-wheel drive auto can turn on or
off automatically based on Drive Mode
selection.
See Selecting a Drive Mode
(page 373).
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FOUR-WHEEL DRIVE –
TROUBLESHOOTING
FOUR-WHEEL DRIVE – WARNING
LAMPS
Illuminates when a four-wheel
drive or power train fault is
present.
Note:
When a system fault is present, the
system can typically remain in whichever
mode was selected prior to the fault
condition occurring. It does not default to
two-wheel drive in all circumstances. When
this warning is displayed, have your vehicle
serviced by an authorized dealer.
FOUR-WHEEL DRIVE – INFORMATION MESSAGES - RAPTOR Action
Message
A four-wheel drive system fault is present.Have your vehicle checked as soon as possible.
Check 4x4
The four-wheel drive system is making ashift.
4x4 Shift in Progress
Displays when you attempt to switch to
four-wheel drive low mode and you do not shift the transmission to neutral (N).
For 4x4 LOW Shift to N
Displays when you attempt to switch tofour-wheel drive low mode and your
vehicle's speed is greater than 3 mph
(5 km/h).
For 4x4 LOW Slow to 3 MPH
For 4x4 LOW Slow to 5 km/h
Displays when you attempt to switch from
four-wheel drive low mode and you do notshift the transmission to neutral (N).
To Exit 4x4 LOW Shift to N
Displays when you attempt to switch fromfour-wheel drive low mode and your
vehicle's speed is greater than
3 mph
(5 km/h).
To Exit 4x4 LOW Slow to 3 MPH
To Exit 4x4 LOW Slow to 5 km/h
Displays when there is a transfer case geartooth blockage while shifting to or from
four-wheel drive low mode or to the neutral state. Place the transmission in a forward
gear, move your vehicle forward approxim-
ately
5 ft (1.5 m), and shift the transmission
back to neutral (N) to allow the transfer case to complete the range shift.
Shift Delayed Drive Forward
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(If Equipped)

Action
Message
Displays when the four-wheel drive systemdetects a mechanical shift block when
shifting out of four-wheel drive high. See
Four-Wheel Drive Limitations (page 292).
4x4 Unable to Disengage. See Manual
Displays when the four-wheel drive systemresumes normal function.
4x4 Restored
Displays when the four-wheel drive systemdetects driving conditions which tempor- arily require greater four-wheel drive
performance. The system automatically
resumes normal function after the system
no longer detects these driving conditions.
4X4 Temporarily Locked
Displays when the system requires an
additional transmission shift to neutral (N) to complete a transfer case shift.
Shift to Neutral
Displays when you command a four-wheeldrive shift during conditions which arepotentially harmful to the driveline components.
To Engage 4x4 Slow to 3 MPH
To Engage 4x4 Slow to 5 km/h
Displays when the four-wheel drive systemrequests that you release the accelerator
pedal to complete a four-wheel drive shift.
See Selecting a Four-Wheel Drive Mode (page 294).
To Engage 4x4 Release Accelerator Pedal
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(If Equipped)

FOUR-WHEEL DRIVE – INFORMATION MESSAGES
Action
Message
A four-wheel drive system fault is present.Have your vehicle checked as soon as possible.
Check 4x4
The four-wheel drive system is making ashift.
4x4 Shift in Progress
Displays when you attempt to switch to
four-wheel drive low mode and you do not shift the transmission to neutral (N).
For 4x4 LOW Shift to N
Displays when you attempt to switch tofour-wheel drive low mode and your
vehicle's speed is greater than 3 mph
(5 km/h).
For 4x4 LOW Slow to 3 MPH
For 4x4 LOW Slow to 5 km/h
Displays when you attempt to switch from
four-wheel drive low mode and you do notshift the transmission to neutral (N).
To Exit 4x4 LOW Shift to N
Displays when you attempt to switch fromfour-wheel drive low mode and your
vehicle's speed is greater than
3 mph
(5 km/h).
To Exit 4x4 LOW Slow to 3 MPH
To Exit 4x4 LOW Slow to 5 km/h
Displays when there is a transfer case geartooth blockage while shifting to or from
four-wheel drive low mode or to the neutral state. Place the transmission in a forward
gear, move your vehicle forward approxim-
ately
5 ft (1.5 m), and shift the transmission
back to neutral (N) to allow the transfer case to complete the range shift.
Shift Delayed Drive Forward
Displays when the four-wheel system
detects elevated system temperature and temporarily stops providing power to thefront wheels. The system automatically
resumes normal function when the system temperature returns to normal.
4x4 Temporarily Disabled
Displays when the four-wheel drive systemdetects a mechanical shift block when
shifting out of four-wheel drive high. See
Four-Wheel Drive Limitations (page 292).
4x4 Unable to Disengage. See Manual
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(If Equipped)

Action
Message
Displays when the four-wheel drive systemresumes normal function.
4x4 Restored
Displays when the four-wheel drive system
detects driving condition which temporarilyrequire greater four-wheel drive perform-ance. The system automatically resumes
normal function after the system no longer detects these driving conditions.
4X4 Temporarily Locked
Displays when the system requires an
additional transmission shift to neutral (N) to complete a transfer case shift.
Shift to Neutral
Displays when you command a four-wheeldrive shift during conditions which arepotentially harmful to the driveline components
To Engage 4x4 Slow to 3 MPH
To Engage 4x4 Slow to 5 km/h
Displays when the four-wheel drive systemrequests that you release the accelerator
pedal to complete a four-wheel drive shift.
See Selecting a Four-Wheel Drive Mode (page 294).
To Engage 4x4 Release Accelerator Pedal
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BRAKE PRECAUTIONS
WARNING: Driving your vehicle
with the warning lamp on is dangerous.
A significant decrease in braking
performance may occur. It may take you
longer to stop your vehicle. Have your
vehicle checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
Wet brakes result in reduced braking
efficiency. Gently press the brake pedal a
few times when leaving a car wash or
driving from standing water to dry the
brakes.
Note: Depending on applicable laws and
regulations in the country for which your
vehicle was originally built, the stoplamps
could flash during heavy braking. Following
this the hazard warning flashers could also
turn on when your vehicle comes to a stop.
ANTI-LOCK BRAKING SYSTEM
ANTI-LOCK BRAKING SYSTEM
LIMITATIONS
The anti-lock braking system does not
eliminate the risk of crash when:
• You drive too closely to the vehicle in
front of you.
• Your vehicle is hydroplaning.
• You take corners too fast.
• The road surface is poor.
Note: If the system activates, the brake
pedal could pulse and travel further.
Maintain pressure on the brake pedal. BRAKE OVER ACCELERATOR
- RAPTOR
In the event the accelerator pedal
becomes stuck or entrapped, apply steady
and firm pressure to the brake pedal to
slow the vehicle and reduce engine power.
If you experience this condition, apply the
brakes and bring your vehicle to a safe
stop. Move the transmission to park (P),
switch the engine off and apply the parking
brake. Inspect the accelerator pedal for
any interference. If none are found and the
condition persists, have your vehicle towed
to the nearest authorized dealer.
Note:
Certain drive modes can disable
brake over accelerator for off-road driving.
BRAKE OVER ACCELERATOR
In the event the accelerator pedal
becomes stuck or entrapped, apply steady
and firm pressure to the brake pedal to
slow the vehicle and reduce engine power.
If you experience this condition, apply the
brakes and bring your vehicle to a safe
stop. Move the transmission to park (P),
switch the engine off and apply the parking
brake. Inspect the accelerator pedal for
any interference. If none are found and the
condition persists, have your vehicle towed
to the nearest authorized dealer.
LOCATING THE BRAKE FLUID
RESERVOIR
See
Under Hood Overview (page 504).
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Side Wind Stabilization
Side wind stabilization is an advanced
feature that works by carefully applying
the brakes on one side of the vehicle to
reduce the effect of a side wind gust on
the vehicle's path.
Torque Vectoring by Brakes
Torque vectoring control applies brake
torque on the inner driven wheel in a curve
for better traction to avoid an understeer,
or oversteer situation. Unlike electronic
stability control, enhanced torque
vectoring control does not slow the
vehicle. It helps control excessive wheel
slip and gives the vehicle improved
cornering agility.
Traction Control
Traction control enhances your vehicle
’s
ability to maintain traction of the wheels
by detecting and controlling wheel spin.
See What Is Traction Control (page 319). Vehicle without stability control
skidding off its intended route.
A
Vehicle with stability control
maintaining control on a slippery
surface.
B
SWITCHING STABILITY
CONTROL ON AND OFF
Stability Control turns on each time you
switch the ignition on.
You can switch the stability control off by
pressing and holding the stability and
traction control button off for 5-15
seconds, or you can press the button again
to switch the system on.
Shifting the transmission into reverse (R)
will disable the system.
You can switch the traction control system
off or on independently. See Switching
Traction Control On and Off (page 319).
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