tires JEEP WRANGLER 2008 User Guide

Follow the recommended tire rotation frequency for your
type of driving. Refer to the “Maintenance Schedule” in
Section 8 of this manual. More frequent rotation is
permissible if desired. The reasons for any rapid or
unusual wear should be corrected prior to rotation being
performed.
The suggested rotation method is the “forward-cross”
shown in the following diagram.TIRE PRESSURE MONITOR SYSTEM (TPMS)
The Tire Pressure Monitoring System (TPMS) will warn
the driver of a low tire pressure based on the vehicle
recommended cold placard pressure.
The tire pressure will vary with temperature by about 1
psi (6.9 kPa) for every 12°F (6.5°C). This means that when
the outside temperature decreases, the tire pressure will
decrease. Tire pressure should always be set based on
cold inflation tire pressure. This is defined as the tire
pressure after a vehicle has not been driven for more than
three hours, or driven less than 1 mi (1 km) after a three
hour period.Refer to the “Tires — General Informa-
tion” in this section for information on how to properly
inflate the vehicle’s tires. The tire pressure will also
increase as the vehicle is driven, this is normal and there
should be no adjustment for this increased pressure.

CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures have
been established for the tire size equipped on your
vehicle. Undesirable system operation or sensor
damage may result when using replacement equip-
ment that is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor damage. Do not
use aftermarket tire sealants or balance beads if your
vehicle is equipped with a TPMS, as damage to the
sensors may result.

inflation pressure of each tire on your vehicle, and inflate
each tire to the vehicle’s recommended cold placard
pressure value. The system will automatically update
and the Tire Pressure Monitoring Telltale Light will
extinguish once the updated tire pressures have been
received. The vehicle may need to be driven for up to 10
minutes above 15 mph (25 km/h) to receive this infor-
mation.
The Tire Pressure Monitoring Telltale Light will flash on
and off for 75 seconds, and will remain on solid when a
system fault is detected. The system fault will also sound
a chime. If the ignition key is cycled, this sequence will
repeat, providing the system fault still exists. A system
fault can occur by any of the following scenarios:
1. Jamming due to electronic devices or driving next to
facilities emitting the same Radio Frequencies as the TPM
sensors.
2. Installing some form of aftermarket window tinting
that affects radio wave signals.3. Lots of snow or ice around the wheels or wheel
housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM sensors.
NOTE:
If your vehicle is equipped with a matching
full-size spare wheel and tire assembly, it has a tire
pressure monitoring sensor, and can be monitored by the
Tire Pressure Monitoring System (TPMS). In the event
that the matching full-size spare tire is swapped with a
low pressure road tire, the next ignition key cycle will
still show the Tire Pressure Monitoring Telltale Light to
be ON, and a chime to sound. Driving the vehicle for up
to 10 minutes above 15 mph (25 km/h) will turn OFF the
Tire Pressure Monitoring Telltale Light as long as none of
the road tires are below the low pressure warning thresh-
old.
334 STARTING AND OPERATING

WARNING!
Improper towing can lead to an injury accident.
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 an accident.
•When hauling cargo or towing a trailer, do not over-
load your vehicle or trailer. Overloading can cause a
loss of control, poor performance or damage to brakes,
axle, engine, transmission, steering, suspension, chas-
sis 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.
•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 transmission, shift the transmis-
sion into 1st gear. And with four-wheel-drive vehicles,
make sure the transfer case is not in N (Neutral).
Always, block orchockthe 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
354 STARTING AND OPERATING

Following off-road usage, completely inspect the under-
body of your vehicle. Check tires, body structure, steer-
ing, suspension and exhaust system for damage. Check
threaded fasteners for looseness, particularly on the
chassis, drivetrain components, steering and suspension.
Retighten, if required, to torque values specified in the
Service Manual. Also check for accumulations of vegeta-
tion or brush that could become a fire hazard, or conceal
damage to fuel lines, brake hoses, axle pinion seals, and
propeller shafts. Check air conditioning drain tube on the
lower dash wall in the engine compartment for mud or
debris, and clean as required. A plugged tube will
adversely affect air conditioning performance.

•Diagnostic Procedure Manuals
Diagnostic Procedure Manuals are filled with dia-
grams, charts and detailed illustrations. These practi-
cal manuals make it easy for students and technicians
to find and fix problems on computer-controlled ve-
hicle systems and features. They show exactly how to
find and correct problems the first time, using step-by-
step troubleshooting and drivability procedures,
proven diagnostic tests and a complete list of all tools
and equipment.
•Owner’s Manuals
These Owner’s Manuals have been prepared with the
assistance of service and engineering specialists to
acquaint you with specific DaimlerChrysler
Corporation vehicles. Included are starting, operating,
emergency and maintenance procedures as well as
specifications, capabilities and safety tips.Call toll free at:
•1–800–890–4038 (U.S.)
•1–800–387–1143 (Canada)
Or
Visit us on the Worldwide Web at:
•www.techauthority.daimlerchrysler.com
•www.daimlerchrysler.ca/manuals
DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories were established by
the National Highway Traffic Safety Administration. The
specific grade rating assigned by the tire’s manufacturer
in each category is shown on the sidewall of the tires on
your vehicle.
442 IF YOU NEED CONSUMER ASSISTANCE

Temperature Grades
The temperature grades are A (the highest), B, and C,
representing the tire’s resistance to the generation of heat
and its ability to dissipate heat, when tested under
controlled conditions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce tire life, and
excessive temperature can lead to sudden tire failure. The
grade C corresponds to a level of performance, which all
passenger car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A repre-
sent higher levels of performance on the laboratory test
wheel, than the minimum required by law.

ABS (Anti-Lock Brake System)............208,309
Adding Fuel ........................... 340
Adding Washer Fluid ..................... 198
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 389
Air Conditioner Maintenance ............... 390
Air Conditioning ..................... 261,264
Air Conditioning Controls ................. 264
Air Conditioning, Operating Tips ............ 265
Air Conditioning Refrigerant ............... 391
Air Conditioning System .................. 264
Air Filter .............................. 389
Air Pressure, Tires ....................... 322
Airbag ................................ 51
Airbag Deployment ....................... 57
Airbag Light ......................... 60,208
Airbag Maintenance ....................... 59
Airbag, Side ............................ 57
Alarm (Security Alarm) .................... 18
Alignment and Balance ................... 328 Alterations/Modifications, Vehicle
............. 8
Antenna, Satellite Radio ................... 255
Antifreeze (Engine Coolant) ................ 424
Anti-Lock Brake System (ABS) ............105,309
Anti-Lock Warning Light .................. 208
Appearance Care ........................ 406
Arming Theft System (Security Alarm) ......... 18
Audio Systems (Radio) .................... 250
Auto Down Power Windows ................ 37
Automatic Transmission ................... 401
Fluid and Filter Changes ................. 401
Fluid Level Check ...................... 401
Fluid Type ........................... 401
Gear Ranges .......................... 281
Shifting ............................. 281
Special Additives ...................... 403
Torque Converter ...................... 285
Auxiliary Electrical Outlet (Power Outlet) ....... 116
Auxiliary Power Outlet .................... 116
446 INDEX

Restraints, Child....................... 62,67
Restraints, Occupant ...................... 40
Roll Over Warning ........................ 5
Rotation, Tires .......................... 329
Safety Checks Inside Vehicle ................. 76
Safety Checks Outside Vehicle ............... 77
Safety Defects, Reporting .................. 440
Safety Information, Tire ................... 313
Safety Tips ............................. 75
Satellite Radio .................... 250,251,253
Satellite Radio Antenna ................... 255
Schedule, Maintenance .................... 428
Seat Belt Reminder ....................... 49
Seat Belts .............................. 41
Adjustable Upper Shoulder Anchorage ........ 47
And Pregnant Women ................... 50
Child Restraint ....................... 62,72
Extender ............................. 50 Front Seat
............................ 41
Maintenance .......................... 411
Pretensioners .......................... 48
Reminder ............................ 207
Seats ................................. 86
Adjustment ........................... 86
Cleaning ............................ 409
Easy Entry ............................ 88
Fold and Tumble Rear ................... 89
Head Restraints ........................ 89
Height Adjustment ...................... 87
Rear Folding .......................... 92
Removal ........................... 91,92
Seatback Release ....................... 87
Tilting ............................... 87
Security Against Theft ..................... 18
Security Alarm (Theft Alarm) ................ 18
Selection of Oil ......................... 384
Sentry Key (Immobilizer) ................... 14
458 INDEX

Storage, Vehicle...................... 266,419
Storing Your Vehicle ...................... 419
Sunrider ........................... 161,164
Supplemental Restraint System - Airbag ........ 51
Sway Bar Disconnect, Electronic ............. 292
Swing Gate, Rear ......................... 38
System, Navigation ...................... 250
System, Remote Starting .................... 25
Tachometer ............................ 209
Temperature Gauge, Engine Coolant .......... 209
Tether Anchor, Child Restraint ............... 68
Theft System Arming ...................... 18
Theft System Disarming .................... 18
Tilt Steering Column ..................... 101
Tip Start .............................. 272
Tire and Loading Information Placard ......317,318
Tire Identification Number (TIN) ............. 316
Tire Markings .......................... 313 Tire Safety Information
.................... 313
Tires .............................. 321,442
Air Pressure .......................... 322
Alignment and Balance .................. 328
Chains .............................. 329
Changing ............................ 366
General Information .................... 321
High Speed .......................... 324
Inflation Pressures ..................... 322
Jacking ........................... 366,369
Load Capacity ..................... 317,318
Pressure Monitor System (TPMS) ........... 330
Pressure Warning Light .................. 210
Quality Grading ....................... 442
Radial .............................. 325
Replacement ......................... 327
Rotation ............................. 329
Safety .............................. 313
Sizes ............................... 314
460 INDEX