2018 JEEP WRANGLER UNLIMITED tires

CAUTION!
Proper operation of four-wheel drive ve-
hicles depends on tires of equal size, type
and circumference on each wheel. Any
difference in tire size can cause damage to
the transfer case. Tire rotation schedule
should be followed to balance tire wear.
STORING THE VEHICLE
If you are storing your vehicle for more than
21 days, we recommend that you take the
following steps to minimize the drain on your
vehicle's battery:
• Disconnect the negative cable from battery.
• Any time you store your vehicle or keep it
out of service (i.e., vacation) for two weeksor more, run the air conditioning system at
idle for about five minutes in the fresh air
and high blower setting. This will ensure
adequate system lubrication to minimize
the possibility of compressor damage when
the system is started again.
BODYWORK
Body And Underbody Maintenance
Cleaning Headlights
Your vehicle is equipped with plastic head-
lights and fog lights that are lighter and less
susceptible to stone breakage than glass
headlights.
Plastic is not as scratch resistant as glass and
therefore different lens cleaning procedures
must be followed.
To minimize the possibility of scratching the
lenses and reducing light output, avoid wip-
ing with a dry cloth. To remove road dirt, wash
with a mild soap solution followed by rinsing.
Do not use abrasive cleaning components,
solvents, steel wool or other aggressive mate-
rial to clean the lenses.
Preserving The Bodywork
Washing
• Wash your vehicle regularly. Always wash
your vehicle in the shade using a mild car
wash soap, and rinse the panels completely
with clear water.
• If insects, tar, or other similar deposits have
accumulated on your vehicle, use a specific
detergent to remove.
• Use a high quality cleaner wax to remove
road film, stains and to protect your paint
finish. Take care never to scratch the paint.
• Avoid using abrasive compounds and power
buffing that may diminish the gloss or thin
out the paint finish.
CAUTION!
• Do not use abrasive or strong cleaning
materials such as steel wool or scouring
powder that will scratch metal and
painted surfaces.
Tire Rotation
239

Minimum Ground Clearance (Reference A)
The clearance value is measured next to the
lower edge of the differential. This value also
defines those for the “Approach Angle” the
“Departure Angle” and the “Breakover
Angle”.
Dimensions are expressed in inches (mm)
and refer to the vehicle equipped with its
original tires.
Approach Angle (Reference B)
The approach angle is determined by the
horizontal line of the road surface, and by the
tangent line passing between the front wheel,
and the most projecting low point of the car.The wider the angle, the lower the chance to
hit an obstacle with the body or chassis, when
climbing a steep slope or overcoming an
obstacle.
Departure Angle (Reference C)
The departure angle is determined by the
same lines of the “Approach Angle”, and
refers to the rear part of the vehicle.
Breakover Angle (Reference D)
The value of the “Breakover Angle” is linked
to the ground clearance of the vehicle and
indicates the attitude of the vehicle to over-
come a wedge, more or less steep, preventing
the vehicle from resting on the ground with
the body or chassis after touching the wedge
with its lowest and most projecting parts
(usually the underbody), because this would
highly reduce wheel grip.The wheels, without a suitable grip to the
ground, will not have sufficient hold to move
the vehicle, and will surge.
The higher the ground clearance, the wider
the breakover angle. Always bear in mind that
the higher the ground clearance, the lower
the stability, due to a higher center of gravity
which reduces the side rollover angle.
Ground Clearance / Typical Angles
Measurements
249

WHEELS
Wheels And Tires
Rim Size Tire Size Tire Pressure psi (bar)
Sport Model 7.5J x 17 x 44.45 mm 245/75 R17 112T (M+S) 36 (2.48)
Sahara Model 7.5J x 18 x 44.45 mm 255/70 R18 113T (M+S) 36 (2.48)
Rubicon Model 7.5J x 17 x 44.45 mm LT255/75 R17C 111Q (M+S) 37 (2.55)
WEIGHTS
Mass Parameters
Axle Load / lbs (kg)
Curb Mass / lbs (kg)Allowable Maximum
Gross Mass / lbs
(kg)Max Payload / lbs
(kg)Max Roof Load / lbs
(kg)
Front Axle Rear Axle
Wrangler Sport
3.6L Gasoline2,224 (1,009) 2,590 (1,175) 4,135.9 (1,876) 5,099.3 (2,313) 888.5 (403) 99.2 (45) (*)
Wrangler Sport
2.0L Gasoline2,240 (1,016) 2,606 (1,182) 4,151.3 (1,883) 5,099.3 (2,313) 888.5 (403) 99.2 (45) (*)
Wrangler Sport
2.2L Diesel2,399 (1,088) 2,729 (1,238) 4,398.2 (1,995) 5,299.9 (2,404) 1,047.2 (475) 99.2 (45) (*)
Wrangler Unlim-
ited Sport 3.6L
Gasoline2,522 (1,144) 2,762 (1,253) 4,429.1 (2,009) 5,423.4 (2,460) 1,071.5 (486) 99.2 (45) (*)
Wrangler Unlim-
ited Sport 2.0L
Gasoline2,538 (1,151) 2,778 (1,260) 4,437.9 (2,013) 5,449.8 (2,472) 1,071.5 (486) 99.2 (45) (*)
TECHNICAL SPECIFICATIONS
250

Mass Parameters
Wrangler Unlim-
ited Rubicon 3.6L
Gasoline2,619 (1,188) 2,862 (1,298) 4,631.9 (2,101) 5,648.2 (2,562) 970.0 (440) 99.2 (45) (*)
Wrangler Unlim-
ited Rubicon 2.0L
Gasoline2,637 (1,196) 2,875 (1,304) 4,636.3 (2,103) 5,674.7 (2,574) 970.0 (440) 99.2 (45) (*)
Wrangler Unlim-
ited Rubicon 2.2L
Diesel2,795 (1,268) 3,016 (1,368) 4,843.6 (2,197) 5,798.2 (2,630) 1,197.1 (543) 99.2 (45) (*)
(*) Valid only for vehicles with hard top
equipped with roof rack. The hard top is not
designed to carry any additional loads, such
as after-market roof racks, spare tires, build-
ing materials, hunting or camping supplies,
etc.
FUEL REQUIREMENTS —
GASOLINE ENGINE
2.0L Engine
This engine is designed to meet all emission
regulations, and provide satisfactory fuel
economy and performance when using high-
quality unleaded gasoline with a recom-
mended RON of 97.While operating on gasoline with the required
octane number, hearing a light knocking
sound from the engine is not a cause for
concern. However, if the engine is heard
making a heavy knocking sound, see your
dealer immediately. Use of gasoline with a
lower than recommended octane number can
cause engine failure and may void or not be
covered by the New Vehicle Limited War-
ranty.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesita-
tions. If you experience these symptoms, try
another brand of gasoline before considering
service for the vehicle.
3.6L Engine
These engines are designed to meet all emis-
sions regulations and provide excellent fuel
economy and performance when using high-
quality unleaded gasoline with a minimum
Research Octane Number (RON) of 91.
Light spark knock at low engine speeds is not
harmful to your engine. However, continued
heavy spark knock at high speeds can cause
damage, and immediate service is required.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesita-
tions. If you experience these symptoms, try
another brand of gasoline before considering
service for the vehicle.
TECHNICAL SPECIFICATIONS
252

Accessories..................262
Mopar...................262
Adding Fuel.................166
Additives, Fuel................253
Air Bag
Air Bag Operation............111
Air Bag Warning Light.........108
Disable, Passenger Air Bag......111
Enhanced Accident Response .119, 205
Event Data Recorder (EDR)......205
Front Air Bag...............110
If Deployment Occurs.........118
Knee Impact Bolsters.........116
Maintaining Your Air Bag System . .120
Maintenance...............120
Redundant Air Bag Warning Light . .109
Transporting Pets............136
Air Bag Light...........66, 108, 137
Air Conditioning Filter............45
Air Conditioning, Operating Tips......45
Air Conditioning System...........44
Air Pressure
Tires....................231
Alarm
Arm The System.............17Disarm The System............18
Security Alarm............17, 70
Alterations/Modifications
Vehicle....................3
Android Auto..........275, 281, 314
Apps....................284
Communication.............284
Maps...................283
Music...................284
Antifreeze (Engine Coolant)........257
Anti-Lock Brake System (ABS).......82
Anti-Lock Warning Light...........70
Apple CarPlay.........276, 285, 314
Apps....................287
Maps...................286
Messages.................286
Music
...................286
Phone...................286
Assist, Hill Start................84
Audio Systems (Radio)...........270
Auto Down Power Windows.........46
Automatic Headlights............36
Automatic Temperature Control (ATC) . . .44
Automatic Transmission..........148
Fluid Level Check............225Fluid Type................261
Auxiliary Electrical Outlet (Power Outlet). .57
Auxiliary Power Outlet............57
Auxiliary Switches..............60
Axle Fluid...................261
Axle Lock...................156
Battery..................68, 221
Charging System Light..........68
Belts, Seat..................137
Blind Spot Monitoring............91
B-Pillar Location..............226
Brake Assist System.............83
Brake Control System............83
Brake Fluid..............224, 261
Brake System................224
Fluid Check...............224
Master Cylinder.............224
Warning Light...............67
Brake/Transmission Interlock.......148
Bulb Replacement..........176, 178
Bulbs, Light..............139, 176
Camera, Rear................165
Capacities, Fluid..............257
INDEX
335

Hood Release.................56
Ignition.....................15
Switch...................15
Installation...................51
Installing....................54
Instrument Cluster..............63
Descriptions................76
Display...................62
Menu Items................63
Instrument Panel Lens Cleaning.....243
Integrated Power Module (Fuses). . . .181
Interior Appearance Care.........242
Intermittent Wipers (Delay Wipers)....38
Introduction...................1
Inverter, Power................59
Jacking Instructions............191
Jack Location................190
Jack Operation.........191, 192, 226
Jump Starting................196
Key Fob
Arm The System.............17
Disarm The System............18
Keyless Enter-N-Go..............18
Passive Entry...............18Keys.......................13
Replacement...............14
Lane Change Assist..............37
Lap/Shoulder Belts.............102
Latches....................139
Hood....................56
Leaks, Fluid.................139
Leveling, Headlight..............37
Life Of Tires.................233
Light Bulbs..............139, 176
Lights.....................139
AirBag ............66, 108, 137
Automatic Headlights..........36
Back-Up.................179
Brake Assist Warning...........87
Brake Warning...............67
Bulb Replacement........176, 178
Center Mounted Stop..........180
Cruise...............75, 77, 78
Daytime Running.............35
Dimmer Switch, Headlight.......35
Engine Temperature Warning......68
Exterior...............35, 139
Fog ..................74, 179
Hazard Warning Flasher........176
Headlight Leveling............37Headlights................178
High Beam.................35
High Beam/Low Beam Select......35
Hill Descent Control Indicator.....89
Lights On Reminder...........37
Malfunction Indicator (Check Engine).71
Park.....................75
Passing...................36
Rear Servicing..............179
Rear Tail Lamps.............179
Seat Belt Reminder......69, 76, 77
Security Alarm..............70
Service...............176, 178
Side Marker...............179
Tire Pressure Monitoring (TPMS)....94
Traction Control..............87
Turn Signal............178, 179
Turn Signals............76, 139
Warning Instrument Cluster
Descriptions.............68, 76
Loading Vehicle
Tires....................226
Locking Axle.................156
Locks
Child Protection..............21
Lowering....................47
Lowering The Top...............47
INDEX
338

Low Tire Pressure System..........94
Lug Nuts...................246
Maintenance..................54
Maintenance Free Battery.........221
Maintenance Schedule.......208, 213
Malfunction Indicator Light (Check
Engine)...................71
Manual Park Release............200
Memory Feature (Memory Seats)......26
Memory Seat..................26
Memory Seats And Radio..........26
Mirrors.....................35
Heated...................35
Modifications/Alterations
Vehicle....................3
Monitor, Tire Pressure System.......94
Mopar Accessories.............262
Navigation..................292
New Vehicle Break-In Period.......146
Occupant Restraints.............99
Octane Rating, Gasoline (Fuel) . .252, 259
Oil, Engine..................259
Capacity.................257
Dipstick..................220Filter....................259
Pressure Warning Light.........69
Recommendation............257
Viscosity.................257
Oil Pressure Light...............69
Onboard Diagnostic System.........78
Operating Precautions............78
Operator Manual
Owner's Manual...............2
Overheating, Engine............199
Paddle Shifters...............149
ParkSense System, Rear..........163
Passenger Airbag Disable.........111
Passive Entry..................18
Personalized Main Menu......273, 279
Pets......................136
Phonebook..................304
Phone (Uconnect)..............297
Pairing
..................300
Placard, Tire And Loading Information .226
Power
Inverter...................59
Windows..................46
Power Sliding Top...............54
Operation..................54
Pinch Protect...............54Power Steering Fluid............261
Pregnant Women And Seat Belts.....106
Preparation For Jacking..........191
Pretensioners
Seat Belts................106
Radial Ply Tires...............232
Radio
Presets...........270, 274, 280
Radio Operation........268, 272, 278
Radio Screens.............272, 278
Raising.....................47
Raising The Soft Top.............47
Rear Camera.................165
Rear Cross Path................93
Rear ParkSense System..........163
Rear Swing Gate...............57
Rear Wiper/Washer..............38
Recreational Towing.............171
Shifting Into Transfer Case Neutral
(N) .....................172
Shifting Out Of Transfer Case Neutral
(N) .....................173
Release, Hood.................56
Reminder, Seat Belt............100
Remote Control
Starting System..............16
339

Remote Keyless Entry
Arm The Alarm..............17
Disarm The Alarm............18
Remote Starting System...........16
Removable Doors............22, 24
Front....................22
Rear.....................24
Removable Top...........47, 51, 54
Dual Top Operation............47
Removal....................51
Removing....................54
Replacement Bulbs.............176
Replacement Keys..............14
Replacement Tires.............233
Restraints, Head...............30
Roll Over Warning...............2
Rotation, Tires................238
Safety Checks Inside Vehicle.......137
Safety Checks Outside Vehicle......139
Safety, Exhaust Gas.............137
Safety Information, Tire..........226
Safety Tips..................136
Schedule, Maintenance.......208, 213
Seat Belt Maintenance...........242
Seat Belt Reminder..............69
Seat Belts...............100, 137Adjustable Shoulder Belt.......105
Adjustable Upper Shoulder
Anchorage................105
Adjustable Upper Shoulder Belt
Anchorage................105
Automatic Locking Retractor (ALR) .106
Energy Management Feature.....106
Front Seat.........100, 102, 103
Inspection................137
Lap/Shoulder Belt Operation.....103
Lap/Shoulder Belts...........102
Lap/Shoulder Belt Untwisting.....105
Operating Instructions.........103
Pregnant Women............106
Pretensioners..............106
Rear Seat
.................102
Reminder.................100
Seat Belt Pretensioner.........106
Seat Belt Reminder . . .69, 76, 77, 100
Untwisting Procedure.........105
Seats......................26
Adjustment................26
Fold And Tumble Rear..........29
Rear Folding................26
Tilting....................26
Security Alarm..............17, 70
Arm The System.............17Disarm The System............18
Selection Of Coolant (Antifreeze).....259
Sentry Key Replacement..........14
Service Assistance.............318
Shifting....................147
Automatic Transmission.....147, 148
Transfer Case, Shifting Into Transfer Case
Neutral (N)................172
Transfer Case, Shifting Out Of Transfer
Case Neutral (N)............173
Shoulder Belts................102
Signals, Turn.......76, 139, 178, 179
Siri.......................313
Snow Chains (Tire Chains).........237
Snow Tires..................235
Soft Top..................47, 54
Spare Tire...................190
Spare Tires...............235, 236
Spark Plugs.................259
Specifications
Fuel (Gasoline).............259
Oil .....................259
Speed Control
Accel/Decel...............162
Cancel...................162
Resume..................162
Speed Control (Cruise Control)......160
INDEX
340