2023 FORD SUPER DUTY display

The warning lamp illuminates and amessage appears in the informationdisplay if the system becomescontaminated or inoperative.
SELECTIVE CATALYTIC REDUCTION SYSTEM – INFORMATIONMESSAGES
ActionMessage
The distance you can travel before depleting the remainingdiesel exhaust fluid. Refill as soon as possible.DEF Level Range: XX mi/km Refill Now
Your diesel exhaust fluid is nearing empty. Your vehicle’s topspeed will become limited in the displayed distance. You mustreplenish the diesel exhaust fluid to resume normal operationof your vehicle. See Diesel Exhaust Fluid Capacity andSpecification (page 230).
DEF Level Empty SpeedLimited to XX MPH / km/h in XX mi/km
Your remaining diesel exhaust fluid has depleted. Your speedwill be limited upon restart. You must replenish the dieselexhaust fluid to resume normal operation of your vehicle. SeeDiesel Exhaust Fluid Capacity and Specification (page230).
DEF Level Empty SpeedLimited to XX MPH/km/h Upon Restart
The diesel exhaust fluid is empty. You must replenish thediesel exhaust fluid to resume normal operation of yourvehicle. See Diesel Exhaust Fluid Capacity and Specific-ation (page 230).
DEF Level Low SpeedLimited to XX MPH/km/h
The selective catalytic reduction system detects low exhaustfluid. The engine will eventually enter into an idle only mode.You must replenish the diesel exhaust fluid to resume normaloperation of your vehicle. See Diesel Exhaust Fluid Capa-city and Specification (page 230).
DEF Level Empty EngineIdled Soon
The vehicle will enter into an idle only mode. You mustreplenish the diesel exhaust fluid to resume normal operationof your vehicle. See Diesel Exhaust Fluid Capacity andSpecification (page 230).
DEF Level Empty EngineIdled See Manual
The selective catalytic reduction system detects a fault. Thevehicle’s top speed will become limited in the displayeddistance and count down from this point. Have your vehiclechecked as soon as possible.
DEF Fault Speed Limitedto XX MPH/km/h in XXmi/km
231
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMSelective Catalytic Reduction System (If Equipped)

MANUAL (M)
In manual (M) you can select a specificgear. See Manually Shifting Gears (page235).
Note:We recommend using this mode fordriving on hilly or mountainous roads orwhen towing a trailer. See Towing a Trailer(page 365).
SHIFTING YOUR VEHICLE INTO
GEAR
The transmission selector is on the steeringcolumn.
1.Press and hold the brake pedal.
2.Move the lever to select a position.
3.Press the manual (M) button whenyour vehicle is in drive (D) to enter orexit mode.
AUTOMATIC TRANSMISSION
POSITION INDICATORS
The instrument cluster displays the currentposition.
Note:The position could illuminate on thetransmission selector.
MANUALLY SHIFTING GEARS
SHIFTING USING THE BUTTONSON THE COLUMN SHIFTER
The instrument cluster displays the currentgear. The current gear flashes when yourvehicle cannot shift into the requestedgear. Your vehicle will not shift if therequested gear raises or lowers the enginespeed beyond the limit.
Your vehicle could shift when you fullypress the accelerator or brake pedal.
Note:Prolonged driving with high enginespeed could cause vehicle damage notcovered by vehicle warranty.
Note:Drive modes could affect when thevehicle shifts into the requested gear.
235
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMAutomatic TransmissionE371381 E341776 E372904

damage drive components. Whentransitioning from consistently loose orslippery surfaces, be sure the four-wheeldrive system is not mechanically blockedonce on dry, hard surface roads intwo-wheel drive high.
Operating Four-Wheel Drive witha Spare or Worn Tires
Your four-wheel drive system is notintended to provide full function with tiresthat have different levels of wear or witha dissimilar spare tire. Incorrect use offour-wheel drive with such tires can causesystem damage.
If there is a difference in the level of wearamong tires on the vehicle or if you installa dissimilar spare tire on the vehicle, do notuse 4WD High or 4WD Low (if equipped)other than to get your vehicle unstuck.After getting your vehicle unstuck, shift to2H by performing the following steps:
1.Come to a stop on a flat, horizontalsurface
2.Shift the transmission to park (P) forautomatic transmissions and neutral(N) for manual transmissions.
3.Switch to two-wheel drive mode.
4.Shift the transmission to reverse (R).
5.Shift the transmission to drive (D) forautomatic transmissions and to firstgear for manual transmissions. Thisensures the transfer case system is nottrapped in place.
Mechanical Shift Blocking
On four-wheel drive vehicles with amechanically locked four-wheel drive highmode, the transfer case distributes torqueto the front wheels by mechanicallyinterlocking the front and rear driveshaftstogether. Various external factors affectshifting performance of this type of systemincluding, but not limited to:
•Vehicle acceleration.
•Dissimilar tire sizes.
•Steering input.
If the system detects a mechanical shiftblockage at speed after you selecttwo-wheel drive high, the message "4x4Unable to Disengage See Manual", coulddisplay momentarily. If this messagedisplays, one or more of the followingactions can relieve the mechanical shiftblock:
•Momentary acceleration.
•Momentary braking.
•Bringing the vehicle to a stop.
•Shifting the transmission to neutral andback to drive.
•Shifting the transmission to reverseand back to drive.
•Driving the vehicle around a tight turnat a slow speed.
SWITCHING FOUR-WHEEL
DRIVE ON AND OFF
A vehicle that comes with four-wheel drive,when selected, has the ability to use allfour wheels to power itself. This increasestraction, which may enable you to safelydrive over terrain and road conditions thata conventional two-wheel drive vehiclecannot.
On some four-wheel drive models, theinitial shift from two-wheel drive tofour-wheel drive while the vehicle ismoving can cause a momentary clunk andratcheting sound. These sounds are normalas the front drivetrain comes up to speedand are not cause for concern.
240
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMFour-Wheel Drive (If Equipped)

SELECTING A FOUR-WHEEL
DRIVE MODE
The drive mode control is on theinstrument panel.
Press the four-wheel drive mode buttonthat best fits the current driving conditions.You can select two-wheel drive high (2H)or four-wheel drive high (4H) at a stop orwhile driving. When the shift is complete,the mode you select appears in theinstrument cluster display. While shifting,the lights on the drive mode control canflash and you could see messages in theinstrument cluster display indicating thata shift is in progress or to release theaccelerator pedal to improve shiftperformance.
Note:Momentarily releasing the acceleratorpedal while a shift in progress messagedisplays improves engagement ordisengagement performance.
Note:Do not perform this operation whencruise control or trail control is selected andactive. The system may not shift asexpected.
Note:Do not perform this operation if therear wheels are slipping, when making atight turn or when applying the acceleratorpedal. The system may not shift asexpected.
Note:You could hear some noise as thesystem shifts or engages, this is normal.
If the system detects a fault, a warningmessage appears in the instrument clusterdisplay. See Four-Wheel Drive –Information Messages (page 243).
Shifting to or from Four-WheelDrive 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 drivebutton on the drive mode control.
A message appears in the instrumentcluster display indicating a four-wheeldrive shift is in progress. If any of the aboveshift conditions are not present, the shiftwill not occur and information guiding youthrough the proper shifting proceduresappears in the instrument cluster display.If there is a transfer case tooth blockage amessage appears in the instrument clusterdisplay. To alleviate this condition, placethe transmission in a forward gear, moveyour vehicle forward approximately 5 ft(1.5 m), and shift the transmission back toneutral (N) to allow the transfer case tocomplete the range shift.
Note:You could hear some noise as thesystem shifts or engages, this is normal.
If the system detects a fault, a warningmessage appears in the instrument clusterdisplay. See Four-Wheel Drive –Information Messages (page 243).
241
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMFour-Wheel Drive (If Equipped)E383456

FOUR-WHEEL DRIVE MODES
TWO-WHEEL DRIVE HIGH
Two-wheel drive high is for generalon-road driving. Power is sent to the rearwheels only.
Note:Two-wheel drive high can turn on oroff based on Drive Mode selection See DriveMode Control (page 311).
FOUR-WHEEL DRIVE HIGH
Four-wheel drive high provideselectronically or mechanically lockedfour-wheel drive power to both the frontand rear wheels for use in off-road orwinter conditions such as deep snow, sandor mud. This mode is not for use on drypavement.
Note:Four-wheel drive high can turn on oroff automatically based on Drive Modeselection. See Selecting a Drive Mode(page 311).
FOUR-WHEEL DRIVE LOW
Four-wheel drive low provideselectronically or mechanically lockedfour-wheel drive power to both the frontand rear wheels for use on low tractionsurfaces, but does so with additionalgearing for increased torque multiplication.This mode is only for off-road conditionssuch as deep sand, steep slopes, or pullingheavy objects.
Note:Four-wheel drive low can turn on oroff automatically based on drive modeselection. See Selecting a Drive Mode(page 311).
FOUR-WHEEL DRIVE
INDICATORS
Two-wheel Drive High
Momentarily illuminates whenyou select two-wheel drive high.
Four-wheel Drive High
Continuously illuminates whenyou select four-wheel drive high.
Four-wheel Drive Low
Continuously illuminates whenyou select four-wheel drive low.
TRANSFER CASE FLUID
CAPACITY AND
SPECIFICATION
See Transfer Case Fluid Capacity andSpecification (page 540).
FOUR-WHEEL DRIVE –
TROUBLESHOOTING
FOUR-WHEEL DRIVE – WARNINGLAMPS
Illuminates when a four-wheeldrive or power train fault ispresent.
Note:When a system fault is present, thesystem can typically remain in whichevermode was selected prior to the faultcondition occurring. It does not default totwo-wheel drive in all circumstances. Whenthis warning is displayed, have your vehicleserviced by an authorized dealer.
242
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMFour-Wheel Drive (If Equipped)E181778 E181779 E181780

FOUR-WHEEL DRIVE – INFORMATION MESSAGES
ActionMessage
A four-wheel drive system fault is present.Have the system checked as soon aspossible.
Check 4x4
The four-wheel drive system is making ashift.4x4 Shift in Progress
Displays when you attempt to switch tofour-wheel drive low mode and you do notshift the transmission to neutral (N).
For 4x4 LOW Shift to N
Displays when you attempt to switch tofour-wheel drive low mode and yourvehicle'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 fromfour-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 yourvehicle'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 fromfour-wheel drive low mode or to the neutralstate. Place the transmission in a forwardgear, move your vehicle forward approxim-ately 5 ft (1.5 m), and shift the transmissionback to neutral (N) to allow the transfercase to complete the range shift.
Shift Delayed Drive Forward
Displays when the system requires anadditional transmission shift to neutral (N)to complete a transfer case shift.
Shift to Neutral
Displays when the system is unable toengage four-wheel drive high and requiresthe driver to slow down before attemptingto engage.
To Engage 4x4 Slow to 3 MPH
243
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMFour-Wheel Drive (If Equipped)

ActionMessage
To Engage 4x4 Slow to 5 km/h
Displays when the four-wheel drive systemrequests that you release the acceleratorpedal to complete a four-wheel drive shift.See Selecting a Four-Wheel Drive Mode(page 241).
To Engage 4x4 Release Accelerator Pedal
Displays when the four-wheel drive systemdetects a mechanical shift block whenshifting out of four-wheel drive high. SeeFour-Wheel Drive Limitations (page 239).
4x4 Unable to Disengage See Manual
244
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMFour-Wheel Drive (If Equipped)

4X4 Rear Electronic Locking Differential Engagement Speed and Availability
Automatic Re-Engagement SpeedAutomatic Disen-gagement SpeedMaximum Engage-ment SpeedDrive Modes
20 mph (30 km/h)25 mph (41 km/h)20 mph (30 km/h)Eco (2H, 4H)
20 mph (30 km/h)25 mph (41 km/h)20 mph (30 km/h)Tow/Haul Mode(2H,4H)
20 mph (30 km/h)25 mph (41 km/h)20 mph (30 km/h)Normal (2H, 4H)
20 mph (30 km/h)25 mph (41 km/h)20 mph (30 km/h)Slippery (2H, 4H)
No Speed LimitNo Speed LimitNo Speed LimitOff-Road (4H, 4L)1
No Speed LimitNo Speed LimitNo Speed LimitRock Crawl (4L)2
1 Engages when you select these drive modes. You have the ability to manually overridethe automatic engagement by pressing the electronic locking differential.2 Engages when you select these drive modes. You have the ability to manually overridethe automatic engagement by pressing the electronic locking differential. Only availablewith Tremor Package.
Automatic Re-Engagement SpeedAutomatic Disen-gagement SpeedMaximum Engage-ment Speed4WD Mode
No Speed LimitNo Speed LimitNo Speed LimitFour-Wheel DriveLow (4L)
Note:The electronic locking differentialmay not engage if you press the acceleratorpedal during an engagement attempt. Amessage could display in the instrumentcluster display guiding you to release theaccelerator pedal.
Note:Switching the electronic lockingdifferential off while turning results indisengagement difficulties. If the electroniclocking differential has difficultydisengaging, release the accelerator pedaland turn the steering wheel back and forthin small increments while maintainingcontrol and following a straight line.
Note:The electronic locking differential isfor off-road use only and is not for use ondry pavement. Using the electronic lockingdifferential on dry pavement results inincreased tire wear, noise and vibration.
Note:Do not perform this operation whencruise control or trail control is selected andactive. The system may not engage ordisengage as expected.
246
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMElectronic Locking Differential (If Equipped)