lock FORD SUPER DUTY 2023 Owners Manual

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.
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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).
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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.
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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
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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
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WHAT IS THE ELECTRONIC
LOCKING DIFFERENTIAL
The electronic locking differential is adevice housed in the rear axle and whenactivated, allows both wheels on that axleto turn at the same speed. The electroniclocking differential provides additionaltraction should your vehicle become stuck.
HOW DOES THE ELECTRONIC
LOCKING DIFFERENTIAL
WORK
You can activate the differentialelectronically and shift it on the fly withinthe operating speed range. The electronicdifferential disengages when the vehiclespeed exceeds a set value and it reengageswhen the vehicle speed drops below a setvalue. See Switching the ElectronicLocking Differential On and Off (page245). The electronic locking differentialcould engage based on certain selecteddrive modes. See Selecting a Drive Mode(page 311). The electronic lockingdifferential is for use in mud, rocks, sand,or any off-road condition where you needmaximum traction.
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:The electronic locking differentialactivates or deactivates automaticallybased on speed, four-wheel drive mode, anddrive mode selection. See Switching theElectronic Locking Differential On andOff (page 245).
ELECTRONIC LOCKING
DIFFERENTIAL PRECAUTIONS
Operating the Electronic LockingDifferential with a Spare orMismatched Tires
On vehicles with an electronic lockingdifferential, the size of the spare tire canaffect performance of the system. If thereis a significant difference between the tworear tires, you may have limited electroniclocking differential functionality. If thesystem has difficulty disengaging, releasethe accelerator pedal and turn the steeringwheel in the opposite direction whenrolling. We recommend engaging anddisengaging the electronic lockingdifferential at a stop when you mount aspare on the rear axle.
SWITCHING THE ELECTRONIC
LOCKING DIFFERENTIAL ON
AND OFF - 4X4
Press the electronic lock differential switchto engage and disengage the lockingdifferential.
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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.
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SWITCHING THE ELECTRONIC
LOCKING DIFFERENTIAL ON
AND OFF - 4X2
Press the electronic locking differentialswitch to engage and disengage theelectronic locking differential.
4X2 Rear Electronic LockingDifferential Engagement Speed andAvailability
AutomaticRe-Engage-ment Speed
AutomaticDisengage-ment Speed
MaximumEngagementSpeed
20 mph(30 km/h)25 mph(41 km/h)20 mph(30 km/h)
Note:The electronic locking differential canactivate or deactivate automatically basedon speed, four-wheel drive mode, and drivemode selection. See Selecting a DriveMode (page 311).
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.
ELECTRONIC LOCKING
DIFFERENTIAL INDICATORS
If both rear wheel axle shaftslock together, the indicator in thecluster is amber, providingadditional traction.
If you select the electronic lockingdifferential and the indicator in the clusteris gray or turns from amber to gray whiledriving, one of the following has occurred:
•The vehicle speed is too high.
•The accelerator pedal is too high duringan engagement attempt.
•The vehicle is experiencing an anti-lockbrake activation.
•The left and right wheel speeddifference is too high during anengagement attempt.
If you select the electronic lockingdifferential and the indicator in the clusterdoes not turn on, the following hasoccurred:
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•The system has malfunctioned andaccompanies a check lockingdifferential message in the informationdisplay. See your dealer as soon aspossible.
Note:If the vehicle is experiencing ananti-lock braking event, the electroniclocking differential may momentarilydisengage.
ELECTRONIC LOCKING DIFFERENTIAL – TROUBLESHOOTING
ELECTRONIC LOCKING DIFFERENTIAL – INFORMATION MESSAGES
Description and ActionMessage
An electronic locking differential system fault is present.Contact an authorized dealer as soon as possible.Check Locking Differen-tial
Release the accelerator pedal to engage.To Engage LockingDifferential ReleaseAccelerator Pedal
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BRAKE PRECAUTIONS
Wet brakes result in reduced brakingefficiency. Gently press the brake pedal afew times when leaving a car wash ordriving from standing water to dry thebrakes.
Note:Depending on applicable laws andregulations in the country where your vehiclewas originally built, the stoplamps couldflash during heavy braking. The hazardwarning flashers could also turn on whenyour vehicle comes to a stop.
ANTI-LOCK BRAKING SYSTEM
ANTI-LOCK BRAKING SYSTEMLIMITATIONS
The anti-lock braking system does noteliminate the risk of crash when:
•You drive too closely to the vehicle infront of you.
•Your vehicle is hydroplaning.
•You take corners too fast.
•The road surface is poor.
Note: If the system activates, the brakepedal could pulse and travel further.Maintain pressure on the brake pedal.
BRAKE OVER ACCELERATOR
In the event the accelerator pedalbecomes stuck or entrapped, apply steadyand firm pressure to the brake pedal toslow the vehicle and reduce engine power.If you experience this condition, apply thebrakes and bring your vehicle to a safestop. Move the transmission to park (P),switch the engine off and apply the parkingbrake. Inspect the accelerator pedal forany interference. If none are found and thecondition persists, have your vehicle towedto the nearest authorized dealer.
LOCATING THE BRAKE FLUID
RESERVOIR
See Under Hood Overview (page 441).
CHECKING THE BRAKE FLUID
WARNING: Do not use any fluidother than the recommended brake fluidas this will reduce brake efficiency. Useof incorrect fluid could result in the lossof vehicle control, serious personal injuryor death.
WARNING: Only use brake fluidfrom a sealed container. Contaminationwith dirt, water, petroleum products orother materials may result in brakesystem damage or failure. Failure toadhere to this warning could result in theloss of vehicle control, serious personalinjury or death.
WARNING: Do not allow the fluidto touch your skin or eyes. If thishappens, rinse the affected areasimmediately with plenty of water andcontact your physician.
WARNING: The brake systemcould be affected if the brake fluid levelis below the MIN mark or above the MAXmark on the brake fluid reservoir.
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