2023 JEEP WRANGLER transmission oil

132STARTING AND OPERATING
STOPPING THE ENGINE
After full load operation, idle the engine for a few minutes before shutting it down. This idle period will allow the lubricating oil and coolant to carry excess heat away from the
turbocharger.
NOTE:Refer to the following chart for proper engine shutdown.
NOTE:Under certain conditions the engine fan will run after the
engine is turned off. These conditions are under high load
and high temperature conditions.
COOLING SYSTEM TIPS — AUTOMATIC
T
RANSMISSION
To reduce the potential for engine and transmission
overheating in high ambient temperature conditions, take
the following actions:
 City Driving — When stopped, shift the transmission
into NEUTRAL (N) and increase engine idle speed.
 Highway Driving — Reduce your speed. 
Up Steep Hills — Select a lower transmission gear.
 Air Conditioning — Turn it off temporarily.
NOTE:If the coolant temperature is too high, the A/C will auto -
matically turn off.
Do Not Operate The Engine With Low Oil
Pressure
If the Oil Pressure Warning Light turns on while driving,
stop the vehicle and shut down the engine as soon as
possible. A chime will sound when the light turns on. After
the vehicle is safely stopped, restart the engine and
monitor the Oil Pressure Warning Light. If the Oil Pressure
Warning Light is still illuminated, turn the engine OFF and contact an authorized dealer for further assistance. If the
lamp is no longer illuminated, the engine can be operated
but it is recommended to take the vehicle to an authorized
dealer as soon as possible.
NOTE:Do not operate the vehicle until the cause is corrected.
This light does not show how much oil is in the engine. The
engine oil level must be checked under the hood.
Driving Condition Load Turbocharger Temperature Idle Time (min.) Before Engine Shutdown
Stop and Go EmptyCoolNone
Stop and Go Medium 0.5
Highway Speeds MediumWarm 1.0
City Traffic Maximum GCWR 1.5
Highway Speeds Maximum GCWR 2.0
Uphill Grade Maximum GCWR Hot2.5
CAUTION!
If oil pressure falls to less than normal readings, shut
the engine off immediately. Failure to do so could result
in immediate and severe engine damage.

23_JL_OM_EN_USC_t.book Page 132

STARTING AND OPERATING133
Do Not Operate The Engine With Failed
Parts
All engine failures give some warning before the parts fail.
Be on the alert for changes in performance, sounds, and
visual evidence that the engine requires service. Some
important clues are:
Engine misfiring or vibrating severely
 Sudden loss of power
 Unusual engine noises
 Fuel, oil or coolant leaks
 Sudden change, outside the normal operating range, in
the engine operating temperature
 Excessive smoke
 Oil pressure drop
ENGINE BREAK-IN RECOMMENDATIONS —
GASOLINE ENGINE (IF EQUIPPED)
A long break-in period is not required for the engine and
drivetrain (transmission and axle) in your vehicle.
Drive moderately during the first 300 miles (500 km).
After the initial 60 miles (100 km), speeds up to 50 or
55 mph (80 or 90 km/h) are desirable.
While cruising, brief full-throttle acceleration within the
limits of local traffic laws contributes to a good break-in.
Wide-open throttle acceleration in low gear can be
detrimental and should be avoided.
The engine oil installed in the engine at the factory is a
high-quality energy conserving type lubricant. Oil changes
should be consistent with anticipated climate conditions
under which vehicle operations will occur. For the recommended viscosity and quality grades
Úpage 374.
NOTE:A new engine may consume some oil during its first few
thousand miles (kilometers) of operation. This should be
considered a normal part of the break-in and not inter
-
preted as a problem.
ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE (IF EQUIPPED)
The diesel engine does not require a break-in period due
to its construction. Normal operation is allowed, providing
the following recommendations are followed:
 Warm up the engine before placing it under load.
 Do not operate the engine at idle for prolonged periods.
 Use the appropriate transmission gear to prevent
engine lugging.
 Observe vehicle oil pressure and temperature indica -
tors.
 Check the coolant and oil levels frequently.
 Vary throttle position at highway speeds when carrying
or towing significant weight.
NOTE:Light duty operation such as light trailer towing or no load
operation will extend the time before the engine is at full
efficiency. Reduced fuel economy and power may be seen
at this time.
The engine oil installed in the engine at the factory is a
high-quality energy conserving type lubricant. Oil changes
should be consistent with anticipated climate conditions
under which vehicle operations will occur. For
recommended viscosity and quality grades see
Úpage 374. NON-DETERGENT OR STRAIGHT MINERAL
OILS MUST NEVER BE USED.
PARKING BRAKE
Before exiting the vehicle, make sure that the parking
brake is fully applied. Also, be certain to leave an
automatic transmission in PARK, or manual transmission
in REVERSE or FIRST gear.
The parking brake lever is located in the center console.
To apply the parking brake, pull the lever up as firmly as
possible. To release the parking brake, pull the lever up
slightly, push the center button, then lower the lever
completely.
CAUTION!
Never use Non-Detergent Oil or Straight Mineral Oil in
the engine or damage may result.
4

23_JL_OM_EN_USC_t.book Page 133

182STARTING AND OPERATING
DRIVING ACROSS AN INCLINE
If at all possible, avoid driving across an incline. If it is
necessary, know your vehicle's abilities. Driving across an
incline places more weight on the downhill wheels, which
increases the possibilities of a downhill slide or rollover.
Make sure the surface has good traction with firm and
stable soils. If possible, transverse the incline at an angle
heading slightly up or down.
IF YOU STALL OR BEGIN TO LOSE HEADWAY
If you stall or begin to lose headway while climbing a steep
hill, allow your vehicle to come to a stop and immediately
apply the brake. Restart the engine and shift into
REVERSE. Back slowly down the hill allowing engine
braking to control the descent and apply your brakes, if
necessary, but do not allow the tires to lock.
Driving Through Water
Extreme care should be taken crossing any type of water.
Water crossings should be avoided, if possible, and only
be attempted when necessary in a safe, responsible
manner. Only drive through areas which are designated
and approved. Tread lightly and avoid damage to the
environment. Know your vehicle's abilities and be able to
recover it if something goes wrong. Never stop or shut a
vehicle off when crossing deep water unless you ingested
water into the engine air intake. If the engine stalls, do not
attempt to restart it. Determine if it has ingested water
first. The key to any crossing is low and slow. Shift into
FIRST gear (manual transmission), or DRIVE (automatic
transmission), with the transfer case in the 4L position
and proceed very slowly with a constant slow speed of {3
to 5 mph (5 to 8 km/h) maximum} and light throttle. Keep
the vehicle moving; do not try to accelerate through the
crossing. After crossing any water higher than the bottom
of the axle differentials, inspect all of the vehicle fluids for
signs of water ingestion.
BEFORE YOU CROSS ANY TYPE OF WATER
As you approach any type of water, you need to determine
if you can cross it safely and responsibly. If necessary, get
out and walk through the water or probe it with a stick. You
need to be sure of its depth, approach angle, current and
bottom condition. Be careful of murky or muddy waters;
check for hidden obstacles. Make sure you will not be
intruding on any wildlife, and you can recover the vehicle
if necessary. The key to a safe crossing is the water depth,
current and bottom conditions. On soft bottoms, the
vehicle will sink in, effectively increasing the water level on
the vehicle. Be sure to consider this when determining the
depth and the ability to safely cross.
CROSSING PUDDLES, POOLS, FLOODED
AREAS OR OTHER STANDING WATER
Puddles, pools, flooded or other standing water areas
normally contain murky or muddy waters. These water
types normally contain hidden obstacles and make it
difficult to determine an accurate water depth, approach
angle, and bottom condition. Murky or muddy water holes
are where you want to hook up tow straps prior to entering.
This makes for a faster, cleaner and easier vehicle
recovery. If you are able to determine you can safely cross,
than proceed using the low and slow method.
WARNING!
Driving across an incline increases the risk of a rollover,
which may result in severe injury.
WARNING!
If the engine stalls or you lose headway or cannot make
it to the top of a steep hill or grade, never attempt to
turn around. To do so may result in tipping and rolling
the vehicle, which may result in severe injury. Always
back carefully straight down a hill in REVERSE. Never
back down a hill in NEUTRAL using only the vehicle
brakes. Never drive diagonally across a hill, always drive
straight up or down.
CAUTION!
Water ingestion into the axles, transmission, transfer
case, engine or vehicle interior can occur if you drive
too fast or through too deep of water. Water can
cause permanent damage to engine, driveline or
other vehicle components, and your brakes will be
less effective once wet and/or muddy.
 When driving through water, do not exceed 5 mph
(8 km/h). Always check water depth before entering
as a precaution, and check all fluids afterward.
Driving through water may cause damage that may
not be covered by the New Vehicle Limited Warranty.
CAUTION!
Muddy waters can reduce the cooling system
effectiveness by depositing debris onto the radiator.

23_JL_OM_EN_USC_t.book Page 182

242MULTIMEDIA
DRIVETRAIN
The Drivetrain page displays information concerning the
vehicle’s drivetrain.
The following information is displayed:
Steering angle in degrees
 Status of Transfer Case
 Status of the Rear Axles — If Equipped

Drivetrain Menu 2WD/4WD

ACCESSORY GAUGE
The Accessory Gauge page displays the current status of
the vehicle’s Coolant Temperature, Oil Temperature, Oil
Pressure (Gas Vehicles Only), Transmission Temperature,
and Battery Voltage.

Accessory Gauges Menu 2WD/4WD

PITCH & ROLL
The Pitch & Roll page displays the vehicle’s current pitch
(angle up and down) and roll (angle side to side) in
degrees. The Pitch & Roll gauges provide a visualization of
the current vehicle angle.

Pitch & Roll Menu 2WD/4WD

1 — Steering Angle
2 — Sway Bar
3 — Front Axle Locker Status
4 — Rear Axle Locker Status
1 — Coolant Temperature
2 — Oil Temperature
3 — Battery Voltage
4 — Transmission Temperature
(Automatic Transmissions Only)
5 — Oil Pressure (Gas Vehicles Only)1 — Current Pitch
2 — Current Roll

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328SERVICING AND MAINTENANCE
(Continued)
(Continued)
Installing The Rear Wiper

1. Lift the wiper arm off of the glass.

2. Insert the wiper blade pivot pin into the opening on
the end of the wiper arm and rotate the wiper in to
place.
3. Place with wiper on the glass and close the tail gate.
EXHAUST SYSTEM
The best protection against carbon monoxide entry into
the vehicle body is a properly maintained engine exhaust
system.
If you notice a change in the sound of the exhaust system;
or if the exhaust fumes can be detected inside the vehicle;
or when the underside or rear of the vehicle is damaged;
have an authorized technician inspect the complete
exhaust system and adjacent body areas for broken,
damaged, deteriorated, or mispositioned parts. Open
seams or loose connections could permit exhaust fumes
to seep into the passenger compartment. In addition, have
the exhaust system inspected each time the vehicle is
raised for lubrication or oil change. Replace as required.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to ensure proper catalyst
operation and prevent possible catalyst damage.
NOTE:Intentional tampering with emissions control systems can
result in civil penalties being assessed against you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop the
vehicle, turn off the engine and allow it to cool. Service,
including a tune-up to manufacturer's specifications,
should be obtained immediately.
To minimize the possibility of catalytic converter damage:
Do not interrupt the ignition when the transmission is
in gear and the vehicle is in motion.
 Do not try to start the vehicle by pushing or towing the
vehicle.
 Do not idle the engine with any ignition components
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
COOLING SYSTEM
WARNING!
Exhaust gases can injure or kill. They contain Carbon
Monoxide (CO), which is colorless and odorless.
Breathing it can make you unconscious and can
eventually poison you
Úpage 288.
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your
exhaust system. Do not park or operate your vehicle
in areas where your exhaust system can contact
anything that can burn.
CAUTION!
The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective -
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
 Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
WARNING!
WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the radiator has had time
to cool. Never open a cooling system pressure cap
when the radiator or coolant bottle is hot.
 Keep hands, tools, clothing, and jewelry away from
the radiator cooling fan when the hood is raised. The
fan starts automatically and may start at any time,
whether the engine is running or not.

23_JL_OM_EN_USC_t.book Page 328

332SERVICING AND MAINTENANCE
FRONT/REAR AXLE FLUID
For normal service, periodic fluid level checks are not
required. When the vehicle is serviced for other reasons
the exterior surfaces of the axle assembly should be
inspected. If gear oil leakage is suspected inspect the fluid
level.
Fluid Level Check
Lubricant should be approximately 1/8 inch (3 mm) below
the bottom edge of the oil fill hole.
NOTE:Make sure that the vehicle is level and supported by the
axles.
Adding Fluid
Add lubricant only at the fill hole and only to the level
specified above.
Selection Of Lubricant
Use only manufacturer recommended fluid Úpage 376.
TRANSFER CASE
Fluid Level Check
The fluid level should be to the bottom edge of the fill hole
when the vehicle is in a level position.

Transfer Case

Drain And Refill
For the proper maintenance intervals Úpage 307.
Selection Of Lubricant
Use only the manufacturer recommended fluid Úpage 376.
MANUAL TRANSMISSION — IF EQUIPPED
Fluid Level Check
Check the fluid level by removing the fill plug. The fluid
level should be between the bottom of the fill hole and a
point not more than 3/16 of an inch (4.76 mm) below the
bottom of the hole.
Add fluid, if necessary, to maintain the proper level.
Frequency Of Fluid Change
Under normal operating conditions, the fluid installed at
the factory will give satisfactory lubrication for the life of
the vehicle. If the fluid becomes contaminated with water,
it should be changed immediately. Otherwise, change the
fluid as recommended in the Maintenance Plan. Refer to
the Maintenance Plan for the proper maintenance
intervals
Úpage 307.
Selection Of Lubricant
Use only the manufacturer recommended manual
transmission fluid Úpage 376.

To avoid contamination from foreign matter or mois -
ture, use only new brake fluid or fluid that has been
in a tightly closed container. Keep the master
cylinder reservoir cap secured at all times. Brake
fluid in an open container absorbs moisture from the
air resulting in a lower boiling point. This may cause
it to boil unexpectedly during hard or prolonged
braking, resulting in sudden brake failure. This could
result in a collision.
 Overfilling the brake fluid reservoir can result in
spilling brake fluid on hot engine parts, causing the
brake fluid to catch fire. Brake fluid can also damage
painted and vinyl surfaces, care should be taken to
avoid its contact with these surfaces.
 Do not allow petroleum-based fluid to contaminate
the brake fluid. Brake seal components could be
damaged, causing partial or complete brake failure.
This could result in a collision.
WARNING!
1 — Fill hole
2 — Drain hole

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384
Door Locks
Automatic ...................................................................23
Door Off Mirror Kit...........................................................29
Door Off Mirror Kit — If Equipped

S
............................ 29
Doors................................................................................ 20 Removal .............................................................. 24
, 27
Removal, Front...........................................................24
Removal, Rear ...........................................................27
Drag & Drop.................................................................. 200
Draining Fuel/Water Separator Filter ......................... 321
Driver Memory Presets ................................................ 207
Driver’s Seat Back Tilt ............................................. 37
, 38
Driving ........................................................................... 178
EElectric Brake Control System..................................... 245 Anti-Lock Brake System ......................................... 244
Electronic Roll Mitigation .............................. 245
, 251
Electric Remote Mirrors ..................................................46 Electrical Outlet, Auxiliary (Power Outlet) ...................... 62Electrical Power Outlets..................................................62Electronic Stability Control (ESC) ................................ 246
Electronic Throttle Control Warning Light................... 118
Emergency In Case Of ................................................................ 291SOS Emergency Call ............................................... 291
Emergency Brake ......................................................... 133
Emergency, In Case Of Jacking..................................................................... 293
Jump Starting .......................................................... 298
Tow Hooks ............................................................... 304
Emission Control System Maintenance...................... 125 Engine............................................................................314
Air Cleaner ............................................................... 319
Block Heater ............................................................129Break-In Recommendations ...................................133
Checking Oil Level ...................................................317
Compartment........................................ 314
, 315, 316
Compartment Identification................. 314, 315, 316
Coolant (Antifreeze)................................................. 374
Cooling .....................................................................328
Exhaust Gas Caution ............................................... 290
Fails To Start ............................................................128 Flooded, Starting ..................................................... 128Fuel Requirements ........................................ 369
, 373
Idling......................................................................... 131
Jump Starting...........................................................298
Oil .......................................................... 318
, 373, 374
Oil Filler Cap ............................................................. 314
Oil Filter ....................................................................319 Oil Reset...................................................................110Oil Selection ................................................... 318
, 373
Oil Synthetic ............................................................. 318
Starting.....................................................................126
Enhanced Accident Response Feature ............. 276
, 305
Ethanol .......................................................................... 370
Exhaust Gas Caution ....................................................290
Exhaust Gas Cautions ..................................................290
Exhaust System .................................................. 290
, 328
Exterior Lights ........................................................50, 290
FFabric Care ....................................................................361
Fabric Top...................................................................... 361
Family Alerts .................................................................. 236
FAQ ................................................................................ 237 Features ........................................................................ 228
Filters
Air Cleaner ............................................................... 319Air Conditioning ................................................ 59
, 325
Engine Fuel .............................................................. 321 Engine Oil................................................................. 319
Engine Oil Disposal ................................................. 319
Flashers Hazard Warning....................................................... 291Turn Signal............................................................... 290Turn Signals.................................................... 123
, 344
Flash-To-Pass.................................................................. 51
Flat Tire Changing ...............................................345
, 355
Flat Tire Stowage .................................................345, 355
Flooded Engine Starting............................................... 128
Fluid Capacities ............................................................ 373
Fluid Leaks.................................................................... 290
Fluid Level Manual Transmission ............................................. 332
Fluid Level Checks ....................................................... 332 Brake........................................................................ 331
Engine Oil................................................................. 317
Fluid, Brake................................................................... 376
Fog Lights...................................................................... 344
Fog Lights, Service ....................................................... 344
Fold And Tumble Rear Seat ........................................... 39
Fold-Flat Seats ................................................................ 37
Folding Rear Seats ......................................................... 39
Folding Windshield ......................................................... 97
Forward Collision Warning ........................................... 255
Four Wheel Drive .......................................................... 140 Operation ........................................................140
, 141
Shifting..................................................................... 140 System ..................................................................... 140

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386
K
Key Fob Arm The System .........................................................20
Disarm The System....................................................20
Programming Additional Key Fobs ...........................15
Key Fob Battery Service (Remote Keyless Entry) .........14
Key Fob Programming (Remote Keyless Entry) ............ 15
Keyless Enter 'n Go™ ...................................................... 21 Passive Entry .............................................................. 21
Keys .................................................................................13 Replacement .............................................................. 15
LLane Change Assist ........................................................52
Lap/Shoulder Belts ...................................................... 262
Latches ......................................................................... 290 Hood ............................................................... 100
, 118
Leaks, Fluid .................................................................. 290
Life Of Tires .................................................................. 354
Light Bulbs ........................................................... 290
, 342
Lights ............................................................................ 290 Air Bag ...................................................117
, 267, 289
Automatic Headlights ................................................51
Brake Assist Warning ............................................. 247
Brake Warning ........................................................ 117 Bulb Replacement ......................................... 342
, 343
Center Mounted Stop ............................................. 345
Cruise.............................................................. 123
, 124
Daytime Running ....................................................... 51
Dimmer Switch, Headlight.........................................51
Electric Power Steering .......................................... 118
Electronic Stability Program (ESP) Indicator .. 118
, 119

Exterior ............................................................. 50, 290
Fog ........................................................................... 344 Fuel Filler Cap .......................................................... 120
Hazard Warning Flasher ......................................... 291
Headlights ................................................................ 343
High Beam ................................................................. 51
High Beam/Low Beam Select .................................. 51
Hill Descent Control Indicator................................. 248
Interior........................................................................ 52
Lights On Reminder................................................... 51
Low Fuel ...................................................................120 Low Washer Fluid ....................................................120Malfunction Indicator (Check Engine).................... 120
Oil Temperature ....................................................... 118
Park .......................................................................... 123Passing....................................................................... 51
Rear Servicing.......................................................... 344
Rear Tail Lamps....................................................... 344
Seat Belt Reminder ................................................. 118
Security Alarm.......................................................... 119
Service ........................................................... 342
, 343
Side Marker ............................................................. 344
Tire Pressure Monitoring (TPMS)............................ 257
Traction Control ....................................................... 247
Transmission Temperature..................................... 119
Turn Signal ............................................................... 290
Turn Signals ................................................... 123
, 344
Warning Instrument Cluster Descriptions.... 118, 123
Load Floor, Cargo.......................................................... 102
Load Shed Battery Saver Mode ...................................114
Load Shed Battery Saver On ........................................ 114
Load Shed Electrical Load Reduction ......................... 114
Load Shed Intelligent Battery Sensor..........................114
Loading Vehicle............................................................. 169 Tires.......................................................................... 349
Locking Axle ...........................................................................144 Locks
Automatic Door ......................................................... 23
Child Protection ......................................................... 23
Power Door ................................................................ 21
Low Tire Pressure System............................................ 257
Lowering The Soft Top Into Sunrider® Position

S
.... 67
Lubrication, Body.......................................................... 326
Lug Nuts/Bolts ............................................................. 368
Luggage Carrier ............................................................ 102
MMaintenance................................................................... 91
Maintenance Free Battery ........................................... 317
Maintenance Schedule .......................................306
, 310
Malfunction Indicator Light (Check Engine) ......120, 125
Manage My Account..................................................... 237
Manual Park Release ........................................................... 301
Service ..................................................................... 380
Manual Transmission..........................................134
, 332
Fluid Level Check .................................................... 332
Lubricant Selection ........................................332
, 376
Shift Speeds ............................................................ 135
Media Mode .................................................................. 210
Methanol ....................................................................... 370
Mirrors ............................................................................. 45 Automatic Dimming .................................................. 45
Electric Powered ....................................................... 46
Electric Remote ......................................................... 46
Heated ....................................................................... 46
Outside....................................................................... 46
Rearview .................................................................... 45
Vanity ......................................................................... 46
Mobile App .................................................................... 227

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