2010 JEEP WRANGLER engine

CAUTION! (Continued)
•The use of fuel additives which are now being
sold as octane enhancers is not recommended.
Most of these products contain high concentra-
tions of methanol. Fuel system damage or vehicle
performance problems resulting from the use of
such fuels or additives is not the responsibility of
the manufacturer.
NOTE: Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Carbon Monoxide Warnings
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning:
•Do not inhale exhaust gases. They contain carbon
monoxide, a colorless and odorless gas which can
kill. Never run the engine in a closed area, such as
a garage, and never sit in a parked vehicle with the
engine running for an extended period. If the
vehicle is stopped in an open area with the engine
running for more than a short period, adjust the
ventilation system to force fresh, outside air into
the vehicle.
(Continued)
5
STARTING AND OPERATING 415

CAUTION!
•Damage to the fuel system or emission control
system could result from using an improper fuel
cap (gas cap). A poorly fitting cap could let impu-
rities into the fuel system. Also, a poorly fitting
aftermarket cap can cause the “Malfunction Indi-
cator Light (MIL)” to illuminate, due to fuel vapors
escaping from the system.
•To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
WARNING!
•Never have any smoking materials lit in or near
the vehicle when the gas cap is removed or the
tank is being filled.(Continued)
WARNING! (Continued)
•Never add fuel when the engine is running. This is
in violation of most state and federal fire regula-
tions and will cause the MIL to turn on.
•A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on
the ground while filling.
NOTE:
•When the fuel nozzle “clicks” or shuts off, the fuel
tank is full.
•Tighten the gas cap about 1/4 turn until you hear one
click. This is an indication that the cap is properly
tightened.
•If the gas cap is not tightened properly, the MIL will
come on. Be sure the gas cap is tightened every time
the vehicle is refueled.
5
STARTING AND OPERATING 417

Engine/
Transmission Axle Model GCWR (Gross
Combined
Wt. Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/Manual 3.21 Two–Door X Model (4WD)5,049 lbs
(2 290 kg) 25 sq ft
(2.32 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Two–Door X Model (4WD)6,049 lbs
(2 744 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Two–Door X Model
(4WD) 6,051 lbs
(2 745 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.8L/Manual 3.21 Two–Door Sahara Model (4WD)5,231 lbs
(2 373 kg) 25 sq ft
(2.32 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Two–Door Sahara Model (4WD)6,231 lbs
(2 826 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Two–Door Sahara
Model (4WD) 6,233 lbs
(2 827 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.8L/Manual 4.10 2–Door Rubicon Model (4WD)6,365 lbs
(2 887 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.8L/
Automatic 4.10 Two–Door Rubicon
Model (4WD) 6,366 lbs
(2 887 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
5
STARTING AND OPERATING 425

Engine/
Transmission Axle Model GCWR (Gross
Combined
Wt. Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Automatic 3.73 Four–Door X
Model (2WD) 7,734 lbs
(3 508 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.8L/
Automatic 3.73 Four–Door Sahara
Model (2WD) 7,893 lbs
(3 580 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.8L/Manual 3.21 Four–Door X Model (4WD)5,431 lbs
(2 463 kg) 32 sq ft
(2.97 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Four–Door X Model (4WD)7,931 lbs
(3 597 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.8L/
Automatic 3.73 Four–Door X
Model (4WD) 7,932 lbs
(3 598 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.8L/Manual 3.21 Four–Door Sahara Model (4WD)5,625 lbs
(2 551 kg) 32 sq ft
(2.97 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Four–Door Sahara Model (4WD)8,125 lbs
(3 685 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.8L/
Automatic 3.73 Four–Door Sahara
Model (4WD) 8,127 lbs
(3 686 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
426 STARTING AND OPERATING

Engine/
Transmission 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 Rubicon Model (4WD)8,248 lbs
(3 741 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.8L/
Automatic 4.10 Four–Door Rubicon
Model (4WD) 8,249 lbs
(3 742 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, and should never exceed the weight referenced on the Tire and Loading Information placard. Refer to
“Tire Safety Information” in “Starting and Operating” for further information.
Trailer and Trailer Tongue Weight
Always load a trailer with 60% to 65% of the weight in
the front of the trailer. This places 10% to 15% of the
Gross Trailer Weight (GTW) on the tow hitch of your
vehicle. Loads balanced over the wheels or heavier in the
rear can cause the trailer to sway severelyside-to-side
which will cause loss of control of vehicle and trailer.
Failure to load trailers heavier in front is the cause of many trailer accidents. Never exceed the maximum
tongue weight stamped on your trailer hitch.
5
STARTING AND OPERATING 427

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 an injury accident.
Follow these guidelines to make your trailer towing
as safe as possible:(Continued)
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 an accident.
•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)
5
STARTING AND OPERATING 429

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
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.
Four-Pin Connector
1 — Female Pins 4 — Park
2 — Male Pin 5 — Left Stop/Turn
3 — Ground 6 — Right Stop/Turn
5
STARTING AND OPERATING 433

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.
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.
434 STARTING AND OPERATING