2018 LINCOLN NAVIGATOR tire size

Drivetrain
ActionMessage
Displays if the electronic limited slip differential system encounters a hardware failure. Haveyour vehicle checked as soon as possible.Check Electronic Limited Slip Differential
Displays if an electronic limited slip differential system fault is present. Have your vehicle checkedas soon as possible.Electronic Limited Slip Differential Off SeeOwner's Manual
Displays when the electronic limited slip differential system resumes normal function.Electronic Limited Slip Differential Restoredto Normal
Displays if the electronic limited slip differential system temporarily turns off due to overheatingor an undersized spare tire. If an undersized spare tire is installed, replace the spare tire with afull-sized tire as soon as possible. If not, stop the vehicle in a safe location and allow the systemto cool.
Electronic Limited Slip DifferentialTemporarily Disabled
Displays if the electronic limited slip differential has limited functionality. This could be due toan undersized spare tire or caused by the system overheating. If an undersized spare tire isinstalled, replace the spare tire with a full-sized tire as soon as possible. If an undersized sparetire is not installed, the vehicle has reduced functionality. Have your vehicle checked as soonas possible.
Electronic Limited Slip Differential ReducedTorque
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Information Displays

Shifting To or From 4L - 4X4 LOW
Note:4L mode is not intended for use on drypavement.
1. Bring the vehicle to a rolling speed of3 mph (5 km/h) or less.
2. Place the gearshift in neutral (N).
3. Rotate the drive mode knob to desiredmode.
The information display shows a messageindicating a 4X4 shift is in progress. Theinformation display shows the system modeselected. If any of the previous shiftconditions are not present, the shift does notoccur and the information display shows theinformation guiding the driver through theproper shifting procedures. If the previousconditions are not satisfied in 30 seconds,the system reverts back to the previous 4WDmode or drive mode.
If Shift Delayed Pull Forward displays in theinformation display, transfer case gear toothblockage is present. To alleviate thiscondition, place the transmission in a forwardgear, move the vehicle forwardapproximately 5 ft (2 m), and shift thetransmission back to neutral (N) to allow thetransfer case to complete the range shift.
Operating 4WD Vehicles With Spareor Mismatched Tires
On four-wheel drive vehicles, the size of thespare tire can affect the 4X4 system. If thereis a significant difference between the sizeof the spare tire and the remaining tires, youmay have limited four-wheel drivefunctionality.
When driving with the full-size dissimilarspare wheel and tire assembly, it isrecommended that you do not:
•Exceed 50 mph (80 km/h) with a 4WDmode turned on.
•Turn on a 4WD mode unless the vehicleis stationary.
•Use a 4WD mode on dry pavement.
Use of a dissimilar spare wheel and tireassembly may lead to impairment of thefollowing:
•Comfort and noise.
•Winter weather driving capability.
•Wet driving capability.
•Four-wheel drive capability.
How Your Vehicle Differs From OtherVehicles
WARNING: Vehicles with a highercenter of gravity (utility and four-wheeldrive vehicles) handle differently thanvehicles with a lower center of gravity(passenger cars). Avoid sharp turns,excessive speed and abrupt steering inthese vehicles. Failure to drive cautiouslyincreases the risk of losing control of yourvehicle, vehicle rollover, personal injuryand death.
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Four-Wheel Drive (If Equipped)

LIMITED SLIP DIFFERENTIAL (IF
EQUIPPED)
The Electronic Limited Slip Differential (eLSD)system directs torque, enabling the vehicleto drive over terrain and road conditions thata conventional axle cannot. The system isactive at all times and requires no input fromthe driver.
Note:If your vehicle is not at optimaloperating conditions or a system fault ispresent, a warning may be displayed in theinstrument cluster. Depending on thewarning, your vehicle may need to beserviced. For more information regarding thesystem information messages, SeeInformation Messages (page 124).
Locking Function (If Equipped)
The lock button engages ‘lockermode’.
With the locker engaged, the systemelectronically locks the differential causingboth half shafts to turn at the same rate. Thisincreases traction during off road events.
The locker mode may automaticallydisengage based on certain conditions suchas vehicle speed. When engaged, a telltalein the instrument cluster will illuminate amberand the switch button will be illuminated.When the speed is exceeded the telltale willturn gray, the locker will be disengaged andbe in standby mode until the speedconditions are met. If the eLSD system isfaulted and the locker cannot engage, awarning message will be displayed in theinstrument cluster and the switch button willflash.
Spare Tire
If your vehicle is equipped with an ElectronicLimited Slip Differential, a spare tire of adifferent size than the tire provided, shouldnot be used. If a spare tire is installed, amessage may appear, indicating the systemhas disabled automatically or reducedfunction to prevent system overheat anddamage. It is recommended to reinstall therepaired or replaced road tire as soon aspossible. When the road tire is replaced, thesystem will resume normal operation on thenext key cycle.
Trailer Towing
The Electronic Limited Slip Differentialenhances vehicle stability during trailer towoperation. During high demand traileringevents (such as steep grades, high speedsor with a spare tire), the system may providea warning in the instrument cluster andreduce function or enter a temporarilydisabled state. To resume normal function,stop the vehicle in a safe location and allowthe unit to adequately cool. Once the systemhas reached normal operating temperatures,system function will be restored and theElectronic Limited Slip Differential Restoredmessage will be displayed.
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Rear AxleE163170

PRINCIPLE OF OPERATION
WARNING: Vehicle modificationsinvolving braking system, aftermarket roofracks, suspension, steering system, tireconstruction and wheel and tire size maychange the handling characteristics of yourvehicle and may adversely affect theperformance of the electronic stabilitycontrol system. In addition, installing anystereo loudspeakers may interfere withand adversely affect the electronic stabilitycontrol system. Install any aftermarketstereo loudspeaker as far as possible fromthe front center console, the tunnel, andthe front seats in order to minimize the riskof interfering with the electronic stabilitycontrol sensors. Reducing theeffectiveness of the electronic stabilitycontrol system could lead to an increasedrisk of loss of vehicle control, vehiclerollover, personal injury and death.
WARNING: Remember that evenadvanced technology cannot defy the lawsof physics. It’s always possible to losecontrol of a vehicle due to inappropriatedriver input for the conditions. Aggressivedriving on any road condition can causeyou to lose control of your vehicleincreasing the risk of personal injury orproperty damage. Activation of theelectronic stability control system is anindication that at least some of the tireshave exceeded their ability to grip theroad; this could reduce the operator’sability to control the vehicle potentiallyresulting in a loss of vehicle control, vehiclerollover, personal injury and death. If yourelectronic stability control system activates,SLOW DOWN.
The system automatically turns on each timeyou switch the ignition on.
If a fault occurs in either the stability controlor the traction control system, you mayexperience the following conditions:
•The stability and traction control lightilluminates steadily.
•The stability control and traction controlsystems do not enhance your vehicle'sability to maintain traction of the wheels.
If a driving condition activates either thestability control or the traction control systemyou may experience the following conditions:
•The stability and traction control lightflashes.
•Your vehicle slows down.
•Reduced engine power.
•A vibration in the brake pedal.
•The brake pedal is stiffer than usual.
•If the driving condition is severe and yourfoot is not on the brake, the brake pedalmay move as the system applies higherbrake force.
The stability control system has severalfeatures built into it to help you maintaincontrol of your vehicle:
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Stability Control

WARNING: Active park assist doesnot apply the brakes under anycircumstances.
WARNING: You are responsible forcontrolling your vehicle at all times. Thesystem is designed to be an aid and doesnot relieve you of your responsibility todrive with due care and attention. Failureto follow this instruction could result in theloss of control of your vehicle, personalinjury or death.
Active park assist is a multi-step process andmay require you to shift the transmissionmultiple times. Follow the onscreeninstructions until the parking maneuver iscomplete.
If you are uncomfortable with the proximityto any vehicle or object, you may choose tooverride the system by grabbing the steeringwheel, or by taking full control of your vehicleafter pressing the active park assist button.
Keep your hands, hair, clothing and anyloose items clear of the steering wheel whenusing active park assist.
The sensors are on the front and rearbumpers.
Note:Keep the sensors free from snow, iceand large accumulations of dirt.
Note:Do not cover up the sensors.
Note:Do not clean the sensors with sharpobjects.
Note:The sensors may not detect objectswith surfaces that absorb ultrasonic waves.The sensors may falsely detect objects dueto ultrasonic interference caused bymotorcycle exhausts, truck air brakes orhorns, for example.
Note:If you change any tires, the systemmust recalibrate and may not correctlyoperate for a short time.
The system may not correctly operate in anyof the following conditions:
•You use a spare tire or a tire that issignificantly worn more than the othertires.
•One or more tires are incorrectly inflated.
•You try to park on a tight curve.
•Something passes between the frontbumper and the parking space. Forexample, a pedestrian or cyclist.
•The edge of the neighboring parkedvehicle is high off the ground. Forexample, a bus, tow truck or flatbedtruck.
•The weather conditions are poor. Forexample, during heavy rain, snow, fog,high humidity and high temperatures.
Do not use the system if:
•You have attached an add-on accessoryclose to the sensors on the front or rearof your vehicle. For example, a bike rackor trailer.
•You have attached an overhangingobject to the roof. For example, asurfboard.
•The front bumper, rear bumper or theside sensors are damaged.
•The correct tire size is not in use on yourvehicle. For example, a mini-spare tire.
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Parking Aids

Possible CauseSymptom
Vehicles or objects bordering the space may not be correctly parked.
Your vehicle stopped too far past the parking space.
The tires may not be correctly installed or maintained. For example, not inflated correctly,improper size, or of different sizes.
A repair or alteration changes the detection capabilities.
A parked vehicle has a high attachment. For example, a salt sprayer, snowplow or movingtruck bed.
The parking space length or position of parked objects changes after your vehicle passesthe space.
The temperature around your vehicle quickly changes. For example, driving from aheated garage into the cold, or after leaving a car wash.
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Parking Aids

Resuming the Set Speed
Press RES.
Switching Cruise Control Off
Note:You erase the set speed when youswitch the system off.
Press OFF when the system is in standbymode, or switch the ignition off.
USING ADAPTIVE CRUISE
CONTROL (IF EQUIPPED)
WARNING: Always pay closeattention to changing road conditions whenusing adaptive cruise control. The systemdoes not replace attentive driving. Failingto pay attention to the road may result ina crash, serious injury or death.
WARNING: Do not use the adaptivecruise control when entering or leaving ahighway, on roads with intersections orroundabouts or non-vehicular traffic orroads that are winding, slippery, unpaved,or steep slopes.
WARNING: Do not use the systemin poor visibility, for example fog, heavyrain, spray or snow.
WARNING: Do not use the systemwhen towing a trailer with aftermarkettrailer brake controls. Aftermarket trailerbrakes will not function properly when youswitch the system on because the brakesare electronically controlled. Failing to doso may result in loss of vehicle control,which could result in serious injury.
WARNING: Do not use tire sizesother than those recommended becausethis can affect the normal operation of thesystem. Failure to do so may result in a lossof vehicle control, which could result inserious injury.
WARNING: Adaptive cruise controlmay not detect stationary or slow movingvehicles below 6 mph (10 km/h).
WARNING: Adaptive cruise controldoes not detect pedestrians or objects inthe road.
WARNING: Adaptive cruise controldoes not detect oncoming vehicles in thesame lane.
WARNING: Adaptive cruise controlis not a crash warning or avoidancesystem.
Note:It is your responsibility to stay alert,drive safely and be in control of the vehicleat all times.
The system adjusts your vehicle speed tomaintain the set gap between you and thevehicle in front of you in the same lane. Youcan select four gap settings.
The system uses a radar sensor that projectsa beam directly in front of your vehicle.
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Cruise Control

Your vehicle may be equipped with atemporary or conventional spare tire. Atemporary spare tire is different in size(diameter or width), tread-type (All-Seasonor All-Terrain) or is from a differentmanufacturer than the road tires on yourvehicle. Consult information on the tire labelor Safety Compliance label for limitationswhen using.
Launching or Retrieving a Boat orPersonal Watercraft (PWC)
Note:Disconnect the wiring to the trailerbefore backing the trailer into the water.
Note:Reconnect the wiring to the trailerafter removing the trailer from the water.
When backing down a ramp during boatlaunching or retrieval:
•Do not allow the static water level to riseabove the bottom edge of the rearbumper.
•Do not allow waves to break higher than6 in (15 cm) above the bottom edge ofthe rear bumper.
Exceeding these limits may allow water toenter vehicle components:
•Causing internal damage to thecomponents.
•Affecting driveability, emissions, andreliability.
Replace the rear axle lubricant anytime therear axle has been submerged in water.Water may have contaminated the rear axlelubricant, which is not normally checked orchanged unless a leak is suspected or otheraxle repair is required.
TOWING THE VEHICLE ON FOUR
WHEELS
WARNING: If your vehicle has asteering wheel lock make sure the ignitionis in the accessory or on position whenbeing towed.
Recreational Towing
Note:Put your climate control system inrecirculated air mode to prevent exhaustfumes from entering your vehicle. SeeClimate Control (page 151).
Follow these guidelines if you have a needfor recreational towing, such as towing yourvehicle behind a motorhome. Theseguidelines are designed to prevent damageto your transmission.
Two-wheel Drive Vehicles
You cannot tow a two-wheel drive vehiclewith any wheels on the ground as vehicle ortransmission damage may occur. You musttow your vehicle with all four wheels off theground, for example when using acar-hauling trailer.
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Towing