engine JEEP WRANGLER 2011 JK / 3.G Manual Online

Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Manual 4.10 Four–Door
RubiconModel
(4WD) 8,406 lbs (3 813 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs
(159 kg)
3.8L/
Auto- matic 4.10 Four–Door
RubiconModel
(4WD) 8,431 lbs (3 824 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs
(159 kg)
Refer to local laws for maximum trailer towing speeds.
NOTE: The trailer tongue weight must be considered as part of the combined weight of occupants and cargo
(ie. the GVWR), and the GVWR should never exceed the weight referenced on the Tire and Loading Infor-
mation placard. Refer to “Tire Safety Information” in “Starting and Operating” for further information.
5
STARTING AND OPERATING 469

NOTE:Remember that everything put into or on the
trailer adds to the load on your vehicle. Also, additional
factory-installed options, or authorized dealer-installed
options, must be considered as part of the total load on
your vehicle. Refer to the “Tire Safety Information/Tire
and Loading Information Placard” in “Starting and Op-
erating” for the maximum combined weight of occupants
and cargo for your vehicle.
Towing Requirements
To promote proper break-in of your new vehicle drive-
train components, the following guidelines are recom-
mended:
NOTE: Trailer towing requires special rear axle lubri-
cant. Refer to “Fluids, Lubricants, and Genuine Parts” in
“Maintaining Your Vehicle” for the correct fluid type.
CAUTION!
•Do not tow a trailer at all during the first 500 miles
(805 km) the new vehicle is driven. The engine,
axle or other parts could be damaged.
•Then, during the first 500 miles (805 km) that a
trailer is towed, do not drive over 50 mph
(80 km/h) and do not make starts at full throttle.
This helps the engine and other parts of the
vehicle wear in at the heavier loads.
WARNING!
Improper towing can lead to a collision. Follow these
guidelines to make your trailer towing as safe as
possible:
(Continued)
5
STARTING AND OPERATING 471

WARNING! (Continued)
•Make certain that the load is secured in the trailer
and will not shift during travel. When trailering
cargo that is not fully secured, dynamic load shifts
can occur that may be difficult for the driver to
control. You could lose control of your vehicle and
have a collision.
•When hauling cargo or towing a trailer, do not
overload your vehicle or trailer. Overloading can
cause a loss of control, poor performance or dam-
age to the brakes, axle, engine, transmission, steer-
ing, suspension, chassis structure or tires.
•Safety chains must always be used between your
vehicle and trailer. Always connect the chains to
the frame or hook retainers of the vehicle hitch.
Cross the chains under the trailer tongue and
allow enough slack for turning corners.(Continued)
WARNING! (Continued)
•Vehicles with trailers should not be parked on a
grade. When parking, apply the parking brake on
the tow vehicle. Put the tow vehicle automatic
transmission in PARK. With a manual transmis-
sion, shift the transmission into first gear. And
with four-wheel-drive vehicles, make sure the
transfer case is not in N (Neutral). Always, block
orchock the trailer wheels.
•GCWR must not be exceeded.
•Total weight must be distributed between the tow
vehicle and the trailer such that the following four
ratings are not exceeded:
1. GVWR
2. GTW
3. GAWR
(Continued)
472 STARTING AND OPERATING

Towing Tips
Before setting out on a trip, practice turning, stopping
and backing the trailer in an area away from heavy
traffic.
If using a manual transmission vehicle for trailer towing,
all starts must be in first gear to avoid excessive clutch
slippage.
Automatic Transmission – If Equipped
The DRIVE range can be selected when towing. How-
ever, if frequent shifting occurs while in this range, the
“O/D OFF” feature should be selected.
NOTE:Using “O/D OFF” while operating the vehicle
under heavy operating conditions will improve perfor-
mance and extend transmission life by reducing exces-
sive shifting and heat build up. This action will also
provide better engine braking. The automatic transmission fluid and filter should be
changed if you REGULARLY tow a trailer for more than
45 minutes of continuous operation. Refer to “Mainte-
nance Schedule” for the proper maintenance intervals.
NOTE:
Check the automatic transmission fluid level
before towing.
O/D Off
To reduce the potential for automatic transmission over-
heating, select the “O/D OFF” feature when driving in
hilly areas or shift the transmission to DRIVE position 2
on more severe grades. Refer to “Automatic Transmis-
sion” in “Starting and Operating” for further
information.
476 STARTING AND OPERATING

Electronic Speed Control – If Equipped

Do not use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
5
STARTING AND OPERATING 477

Shifting Into Neutral (N)
Use the following procedure to prepare your vehicle for
recreational towing.
WARNING!
You or others could be injured if you leave the
vehicle unattended with the transfer case in the N
(Neutral) position without first fully engaging the
parking brake. The transfer case N (Neutral) position
disengages both the front and rear driveshafts from
the powertrain and will allow the vehicle to move,
even if the transmission is in PARK. The parking
brake should always be applied when the driver is
not in the vehicle.
CAUTION!
It is necessary to follow these steps to be certain that
the transfer case is fully in N (Neutral) before recre-
ational towing to prevent damage to internal parts.
1. Bring the vehicle to a complete stop.
2. Turn OFF the engine.
3. Press and hold the brake pedal.
4. Shift the automatic transmission into NEUTRAL or
depress the clutch pedal on a manual transmission.
5. Shift the transfer case lever into N (Neutral).
6. Start the engine.
7. Shift the transmission into REVERSE.
480 STARTING AND OPERATING

8. Release the brake pedal (and clutch pedal on manual
transmissions) for five seconds and ensure that there is
no vehicle movement.
9. Repeat steps 7 and 8 with automatic transmission in
DRIVE or manual transmission in first gear.
10. Turn OFF the engine and leave the ignition switch in
the unlocked OFF position.
11. Firmly apply the parking brake.
12. Shift the transmission into PARK or place manual
transmission in gear (NOT in Neutral).
CAUTION!
Damage to the transmission may occur if the trans-
mission is shifted into PARK with the transfer case in
N (Neutral) and the engine running. With the trans-
fer case in N (Neutral) ensure that the engine is OFF
prior to shifting the transmission into PARK.13. Attach the vehicle to the tow vehicle using a suitable
tow bar.
14. Release the parking brake.
15. Disconnect the negative battery cable, and secure it
away from the negative battery post.
Shifting Out of Neutral (N)
Use the following procedure to prepare your vehicle for
normal usage.
1. Bring the vehicle to a complete stop, leaving it con-
nected to the tow vehicle.
2. Firmly apply the parking brake.
3. Reconnect the negative battery cable.
4. Turn the ignition key/fob to the LOCK/OFF position
(if it has been moved or the engine has been started).
5
STARTING AND OPERATING 481

5. Turn the ignition key/fob to the ON/RUN position,
but do not start the engine.
6. Press and hold the brake pedal.
7. Shift the transmission into NEUTRAL.
8. Shift the transfer case lever to the desired position.
NOTE:When shifting out of transfer case N (Neutral),
turning the engine OFF may be required to avoid gear
clash.
9. Shift the automatic transmission into PARK, or place
manual transmission in Neutral. 10. Release the brake pedal.
11. Disconnect vehicle from the tow vehicle.
12. Start the engine.
13. Press and hold the brake pedal.
14. Release the parking brake.
15. Shift the transmission into gear, release the brake
pedal (and clutch pedal on manual transmissions), and
check that the vehicle operates normally.
482 STARTING AND OPERATING

WHAT TO DO IN EMERGENCIES
CONTENTS
Hazard Warning Flashers ................ 484
 If Your Engine Overheats ................ 484
 Jacking And Tire Changing ............... 485
▫ Jack Location ....................... 486
▫ Spare Tire Stowage ................... 486
▫ Preparations For Jacking ............... 487
▫ Jacking Instructions ................... 488
 Jump-Starting Procedures ................ 491
▫ Preparations For Jump-Start ............. 492▫
Jump-Starting Procedure ............... 493
 Freeing A Stuck Vehicle ................. 495
 Emergency Tow Hooks — If Equipped ...... 496
 Shift Lever Override ................... 497
 Towing A Disabled Vehicle ............... 498
▫ Towing Without The Ignition Key FOB ..... 500
▫ Four–Wheel Drive Models .............. 500
6

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located on the
instrument panel below the climate controls.Press the switch to turn on the Hazard Warning
flasher. When the switch is activated, all directional
turn signals will flash on and off to warn oncoming
traffic of an emergency. Press the switch a second time to
turn off the Hazard Warning flashers.
This is an emergency warning system and it should not
be used when the vehicle is in motion. Use it when your
vehicle is disabled and it is creating a safety hazard for
other motorists.
When you must leave the vehicle to seek assistance, the
Hazard Warning flashers will continue to operate even
though the ignition is placed in the OFF position.
NOTE: With extended use the Hazard Warning flashers
may wear down your battery.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
•On the highways — slow down.
•In city traffic — while stopped, shift transmission into
NEUTRAL, but do not increase engine idle speed.
CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads HOT
(H), pull over and stop the vehicle. Idle the vehicle
with the air conditioner turned off until the pointer
drops back into the normal range. If the pointer
remains on HOT (H), and you hear continuous
chimes, turn the engine off immediately, and call for
service.
484 WHAT TO DO IN EMERGENCIES