tow JEEP WRANGLER 2008 Owner's Manual

If using a manual transmission vehicle for trailer towing,
all starts must be in 1st gear to avoid excessive clutch
slippage.
Towing Tips — Automatic Transmission
The DRIVE range can be selected when towing. How-
ever, if frequent shifting occurs while in this range, the
OVERDRIVE range 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 the “Main-
tenance Schedule” in Section 8 of this manual for trans-
mission fluid change intervals. NOTE:
Check the automatic transmission fluid level
before towing.
Towing Tips — O/D Off
To reduce potential for automatic transmission overheat-
ing, 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 “Transmission Shifting” in
this section.
Towing Tips — Electronic Speed Control (If
Equipped)

Don’t 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.
358 STARTING AND OPERATING

Towing – 4WD Models
NOTE:The transfer case must be shifted into N (Neu-
tral) for recreational towing.
Shifting Into Neutral (N)
Use the following procedure to prepare your vehicle for
recreational towing.

CAUTION!
•Do not use a bumper-mounted clamp-on tow bar
on your vehicle. The bumper face bar will be
damaged.
362 STARTING AND OPERATING

WARNING!
Raising the vehicle higher than necessary can make
the vehicle less stable and cause an accident. It could
slip off the jack and hurt someone near it. Raise the
vehicle only enough to remove the tire.
6. Remove the lug nuts and wheel.
7. Position spare wheel/tire on vehicle and install lug
nuts with cone-shaped end toward wheel. Lightly tighten
nuts clockwise. To avoid the risk of forcing the vehicle off
the jack, do not tighten the nuts fully until the vehicle has
been lowered.
8. Lower the vehicle by turning the jack screw to the left,
and remove the jack and wheel blocks. 9. Finish tightening the lug nuts. Push down on the
wrench while tightening for increased leverage. Alternate
nuts until each nut has been tightened twice. Correct
wheel nut tightness is 95 ft lbs (130 N·m). If in doubt
about the correct tightness, have them checked with a
torque wrench by your authorized dealer or at a service
station.
10. Remove jack assembly and wheel blocks.

EMERGENCY TOW HOOKS — IF EQUIPPED
If your vehicle is equipped with tow hooks, they are
mounted in the front and the rear.

To minimize the possibility of catalytic converter dam-
age:
•Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start the engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing.
•Do not idle the engine for prolonged periods during
very rough idle or malfunctioning operating condi-
tions.
•Do not allow vehicle to run out of fuel.NOTE:
Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Crankcase Emission Control System
Proper operation of this system depends on freedom
from sticking or plugging due to deposits. As vehicle
mileage builds up, the PCV valve and passages may
accumulate deposits. If a valve is not working properly,
replace it with a new valve. DO NOT ATTEMPT TO
CLEAN THE OLD PCV VALVE!
Check ventilation hose for indication of damage or
plugging deposits. Replace if necessary.
Fuel Filter
A plugged fuel filter can cause hard starting or limit the
speed at which a vehicle can be driven. Should an
excessive amount of dirt accumulate in the fuel tank,
frequent replacement of the fuel filter which is mounted
in the fuel tank may be necessary.
388 MAINTAINING YOUR VEHICLE

Cavity CartridgeFuseMini
Fuse Description
M11 10 Amp
Red (Ignition Off Draw)
IOD-HVAC/ATC, MW
SENSR, Underhood
Lamp (UH LMP)
M12 30 Amp GreenAmplifier (AMP)
M13 20 Amp YellowIgnition Off Draw—
Cabin Compartment
Node (IOD-CCN),
Wireless Control Mod-
ule (WCM), SIREN,
Multifunction Control
Switch (MULTIFCTN
SW)
M14 20 Amp YellowTrailer Tow (Export
Only)

REPLACEMENT BULBS — IF EQUIPPED
Interior LightsBulb Type
Auto. Trans. Indicator Light ................. 658
Courtesy Lights, Under Dash (1) .............. 906
Heater Control Lights (2) ................... 194
Rocker Switch Indicator Light (Rear Window
Defogger, and Rear Wash/Wipe) ............... **
Soundbar Dome Light ..................... 912
** Bulbs only available from authorized dealer.
Exterior Lights Bulb Type
Backup Lights (2) ........................ 3157
Center High-Mounted Stop Light (1) .........L.E.D.
Fog Lights ............................. 9145
Front Park/Turn Lights (2) .................3157
Front Side Marker Lights (2) ................. 168
Headlights (2) .......................... H13
Stop/Tail/Turn Lights (2) ..................3157
Underhood Light ......................... 561
License Light ........................... 194 NOTE:
Numbers refer to commercial bulb types that
can be purchased from your local authorized dealer.
If a bulb needs to be replaced, visit your authorized
dealer or refer to the applicable Service Manual.
BULB REPLACEMENT
NOTE: Lens fogging can occur under certain atmo-
spheric conditions. This will usually clear as atmospheric
conditions change to allow the condensation to change
back into a vapor. Turning the lamps on will usually
accelerate the clearing process.
Head Light
1. Open hood and support using prop rod.
2. Remove the front grille. Turn the retainers along the
top 1/4 turn counterclockwise and remove.
3. Pull the bottom of the grille away starting at one side
and working toward the other.
420 MAINTAINING YOUR VEHICLE

Jacking............................. 366
Jump Starting ......................... 371
Tow Hooks .......................... 374
Emission Control System Maintenance ......380,428
Engine ................................ 75
Air Cleaner .......................... 389
Block Heater ......................... 275
Break-In Recommendations ................ 75
Compartment ......................... 378
Compartment Identification ............... 378
Exhaust Gas Caution .................. 75,339
Fails to Start .......................... 273
Flooded, Starting ...................... 273
Fuel Requirements .................. 336,424
Jump Starting ......................... 371
Oil .............................. 383,424
Oil Disposal .......................... 385
Oil Filter ............................ 385
Oil Selection .......................... 424 Operation
............................ 75
Overheating .......................... 365
Starting ............................. 271
Temperature Gauge ..................... 209
Engine Oil Viscosity ...................... 384
Engine Oil Viscosity Chart ................. 384
Enhanced Accident Response Feature .......... 59
Entry System, Illuminated .................. 19
Event Data Recorder ...................... 60
Exhaust Gas Caution ................... 75,339
Exhaust System ......................... 393
Extender, Seat Belt ........................ 50
Exterior Finish Care ...................... 407
Fabric Care ......................... 409,411
Fabric Top ............................. 411
Filters Air Cleaner .......................... 389
Engine Fuel .......................... 388
450 INDEX

Gasoline/Oxygenate Blends................ 337
Gauges Coolant Temperature .................... 209
Fuel ................................ 206
Odometer ............................ 211
Speedometer ......................... 206
Tachometer .......................... 209
Gear Ranges ........................ 276,281
General Information .................... 17,335
Glass Cleaning .......................... 410
Gross Axle Weight Rating ...............342,345
Gross Vehicle Weight Rating .............342,345
GVWR ............................... 342
Hands-Free Phone (UConnect™) ........85,250,251
Hard Drive (HDD) ....................... 250
HardTop ............................. 125
Hard Top, Modular ...................... 125
Hard Top Removal ....................... 129 Hazard Warning Flasher
................... 364
Head Restraints .......................... 89
Head Rests ............................. 89
Headlights Bulb Replacement ...................... 420
Dimmer Switch ........................ 98
Replacing ............................ 420
Switch ............................... 97
Heater ............................... 259
Heater, Engine Block ..................... 275
High Beam Indicator ..................... 207
Hitches Trailer Towing ........................ 348
Holder, Cup ........................... 117
Hood Release ........................... 94
Hoses ............................. 399,400
Hydraulic Clutch Fluid .................... 403
Ignition ............................... 12
452 INDEX