transmission JEEP WRANGLER UNLIMITED 2013 Workshop Manual

Engine/
Transmission Axle Model GCWR
(Gross
Combined
Wt. Rating) Frontal Area Max. GTW
(Gross
Trailer Wt.) Max. Trailer
Tongue Wt.
(See Note)
3.6L/Manual 3.21 Two–Door
Sahara Model
(4WD) 5,430 lbs
(2 463 kg) 25 sq ft
(2.32 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.6L/Manual 3.73 Two–Door
Sahara Model
(4WD) 6,430 lbs
(2 916 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.6L/
Automatic 3.73 Two–Door
Sahara Model
(4WD) 6,454 lbs
(2 927 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.6L/Manual 4.10 2–Door
Rubicon
Model (4WD) 6,507 lbs
(2 951 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)520 STARTING AND OPERATING

Engine/
Transmission Axle Model GCWR
(Gross
Combined
Wt. Rating) Frontal Area Max. GTW
(Gross
Trailer Wt.) Max. Trailer
Tongue Wt.
(See Note)
3.6L/
Automatic 4.10 Two–Door
Rubicon
Model (4WD) 6,533 lbs
(2 963 kg) 25 sq ft
(2.32 sq m) 2,000 lbs
(907 kg) 200 lbs (91 kg)
3.6L/Manual 3.21 Four–Door
Sport Model
(4WD) 5,742 lbs
(2 604 kg) 32 sq ft
(2.97 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.6L/Manual 3.73 Four–Door
Sport Model
(4WD) 8,242 lbs
(3 738 kg) 32 sq ft
(2.97 sq m) 3,500 lbs (1
587 kg) 350 lbs
(159 kg)
3.6L/
Automatic 3.73 Four–Door
Sport Model
(4WD) 8,257 lbs
(3 745 kg) 32 sq ft
(2.97 sq m) 3,500 lbs (1
587 kg) 350 lbs
(159 kg)
5 STARTING AND OPERATING 521

Engine/
Transmission Axle Model GCWR
(Gross
Combined
Wt. Rating) Frontal Area Max. GTW
(Gross
Trailer Wt.) Max. Trailer
Tongue Wt.
(See Note)
3.6L/Manual 3.21 Four–Door
Sahara Model
(4WD) 5,782 lbs
(2 623 kg) 32 sq ft
(2.97 sq m) 1,000 lbs
(453 kg) 100 lbs (45 kg)
3.6L/Manual 3.73 Four–Door
Sahara Model
(4WD) 8,282 lbs
(3 757 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.6L/
Automatic 3.73 Four–Door
Sahara Model
(4WD) 8,297 lbs
(3 763 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)
3.6L/Manual 4.10 Four–Door
Rubicon
Model (4WD) 8,406 lbs
(3 813 kg) 32 sq ft
(2.97 sq m) 3,500 lbs
(1 587 kg) 350 lbs
(159 kg)522 STARTING AND OPERATING

Engine/
Transmission Axle Model GCWR
(Gross
Combined
Wt. Rating) Frontal Area Max. GTW
(Gross
Trailer Wt.) Max. Trailer
Tongue Wt.
(See Note)
3.6L/
Automatic 4.10 Four–Door
Rubicon
Model (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 Information
placard. Refer to “Tire Safety Information” in “Starting
and Operating” for further information.
5 STARTING AND OPERATING 523

WARNING!Improper towing can lead to a collision. Follow these
guidelines to make your trailer towing as safe as
possible:
• 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. (Continued) WARNING! (Continued)• 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.
• 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 or
 chock  the trailer wheels.
• GCWR must not be exceeded. (Continued)526 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, use
the Electronic Range Select (ERS) shift control to select a
lower gear range. NOTE: Using a lower gear range while operating the
vehicle under heavy loading conditions will improve
performance and extend transmission life by reducing
excessive shifting and heat buildup. This action will also
provide better engine braking.
If you REGULARLY tow a trailer for more than 45 min-
utes of continuous operation, then change the transmis-
sion fluid and filter as specified for  police, taxi, fleet, or
frequent trailer towing.  Refer to the “Maintenance
Schedule” for the proper maintenance intervals.
NOTE: Check the automatic transmission fluid level
before towing.530 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:
City Driving
When stopped for short periods of time, shift the trans-
mission into NEUTRAL and increase engine idle speed.
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
5 STARTING AND OPERATING 531

RECREATIONAL TOWING (BEHIND MOTORHOME, ETC.)
Towing This Vehicle Behind Another Vehicle
Towing Condition Wheels OFF the Ground Four-Wheel Drive Models
Flat Tow NONE See Instructions
• Automatic transmission in PARK
• Manual transmission in gear
(NOT in N NEUTRAL)
• Transfer case in NEUTRAL (N)
• Tow in forward direction
Dolly Tow Front NOT ALLOWED
Rear NOT ALLOWED
On Trailer ALL OK532 STARTING AND OPERATING

Recreational Towing – Four-Wheel Drive Models
NOTE: The transfer case must be shifted into NEUTRAL
(N), automatic transmission must be shifted into PARK,
and manual transmission must be placed in gear (NOT in
NEUTRAL) for recreational towing.
CAUTION!• Front or rear wheel lifts should not be used. Inter-
nal damage to the transmission or transfer case will
occur if a front or rear wheel lift is used when
recreational towing.
• Tow only in the forward direction. Towing this
vehicle backwards can cause severe damage to the
transfer case.
• Automatic transmissions must be placed in the
PARK position for recreational towing. (Continued) CAUTION! (Continued)• Manual transmissions must be placed in gear (not
in Neutral) for recreational towing.
• Before recreational towing, perform the procedure
outlined under “Shifting Into NEUTRAL (N)” to be
certain that the transfer case is fully in NEUTRAL
(N). Otherwise, internal damage will result.
• Towing this vehicle in violation of the above re-
quirements can cause severe transmission and/or
transfer case damage. Damage from improper tow-
ing is not covered under the New Vehicle Limited
Warranty.
• Do not use a bumper-mounted clamp-on tow bar
on your vehicle. The bumper face bar will be
damaged.
5 STARTING AND OPERATING 533

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
NEUTRAL (N) position without first fully engaging
the parking brake. The transfer case NEUTRAL (N)
position disengages both the front and rear drive-
shafts 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 NEUTRAL (N) before
recreational 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 NEUTRAL (N).
6. Start the engine.534 STARTING AND OPERATING