
SERVICING AND MAINTENANCE453
Consult an authorized tire dealer for tire repairs 
and additional information.
Damaged Run Flat tires, or Run Flat tires that have 
experienced a loss of pressure should be replaced 
immediately with another Run Flat tire of identical 
size and service description (Load Index and 
Speed Symbol). Replace the tire pressure sensor 
as well as it is not designed to be reused.
Run Flat Tires — If Equipped
Run Flat tires allow you the capability to drive 
50 miles (80 km) at 50 mph (80 km/h) after a 
rapid loss of inflation pressure. This rapid loss of 
inflation is referred to as the Run Flat mode. A Run 
Flat mode occurs when the tire inflation pressure is 
of/or below 14 psi (96 kPa). Once a Run Flat tire 
reaches the Run Flat mode it has limited driving 
capabilities and needs to be replaced immediately. 
A Run Flat tire is not repairable. When a Run Flat 
tire is changed after driving with underinflated tire 
condition, please replace the TPMS sensor as it is 
not designed to be reused when driven under Run 
Flat mode 14 psi (96 kPa) condition.
NOTE:The TPMS Sensor must be replaced after driving 
the vehicle on a flat tire condition. It is not recommended driving a vehicle loaded at 
full capacity or to tow a trailer while a tire is in the 
Run Flat mode.
For more information  Ú
page 328.
Tire Spinning 
When stuck in mud, sand, snow, or ice conditions, 
do not spin your vehicle's wheels above 30 mph 
(48 km/h) or for longer than 30 seconds 
continuously without stopping.
For further information  Ú page 389.
Tread Wear Indicators 
Tread wear indicators are in the original equipment 
tires to help you in determining when your tires 
should be replaced.
Tire Tread
These indicators are molded into the bottom of the 
tread grooves. They will appear as bands when the 
tread depth becomes a 1/16 of an inch (1.6 mm). 
When the tread is worn to the tread wear 
indicators, the tire should be replaced.
For further information  Ú page 454.
WARNING!
Fast spinning tires can be dangerous. Forces 
generated by excessive wheel speeds may 
cause tire damage or failure. A tire could 
explode and injure someone. Do not spin your 
vehicle's wheels faster than 30 mph (48 km/h) 
for more than 30 seconds continuously when 
you are stuck, and do not let anyone near a 
spinning wheel, no matter what the speed.
1 — Worn Tire
2 — New Tire
8
22_DT_OM_EN_USC_t.book  Page 453   

454SERVICING AND MAINTENANCE  
Life Of Tire  
The service life of a tire is dependent upon varying 
factors including, but not limited to:
Driving style
Tire pressure - Improper cold tire inflation pres -
sures can cause uneven wear patterns to 
develop across the tire tread. These abnormal 
wear patterns will reduce tread life, resulting in 
the need for earlier tire replacement
Distance driven
Performance tires, tires with a speed rating of V 
or higher, and Summer tires typically have a 
reduced tread life. Rotation of these tires per 
the vehicle scheduled maintenance is highly 
recommended
NOTE:Wheel Valve Stem must be replaced as well when 
installing new tires due to wear and tear in existing 
tires. Keep dismounted tires in a cool, dry place with as 
little exposure to light as possible. Protect tires 
from contact with oil, grease, and gasoline.
Replacement Tires 
The tires on your new vehicle provide a balance of 
many characteristics. They should be inspected 
regularly for wear and correct cold tire inflation 
pressures. The manufacturer strongly 
recommends that you use tires equivalent to the 
originals in size, quality and performance when 
replacement is needed  Ú
page 453. Refer to the 
Tire and Loading Information placard or the 
Vehicle Certification Label for the size designation 
of your tire. The Load Index and Speed Symbol for 
your tire will be found on the original equipment 
tire sidewall.
For more information relating to the Load Index 
and Speed Symbol of a tire  Ú page 445.
It is recommended to replace the two front tires or 
two rear tires as a pair. Replacing just one tire can 
seriously affect your vehicle’s handling. If you ever 
replace a wheel, make sure that the wheel’s 
specifications match those of the original wheels.
It is recommended you contact an authorized tire 
dealer or original equipment dealer with any 
questions you may have on tire specifications or 
capability. Failure to use equivalent replacement 
tires may adversely affect the safety, handling, and 
ride of your vehicle.
WARNING!
Tires and the spare tire should be replaced after 
six years, regardless of the remaining tread. 
Failure to follow this warning can result in 
sudden tire failure. You could lose control and 
have a collision resulting in serious injury or 
death.
WARNING!
Do not use a tire, wheel size, load rating, or 
speed rating other than that specified for your 
vehicle. Some combinations of unapproved 
tires and wheels may change suspension 
dimensions and performance characteristics, 
resulting in changes to steering, handling, and 
braking of your vehicle. This can cause unpre -
dictable handling and stress to steering and 
suspension components. You could lose 
control and have a collision resulting in 
serious injury or death. Use only the tire and 
wheel sizes with load ratings approved for 
your vehicle.
Never use a tire with a smaller load index or 
capacity, other than what was originally 
equipped on your vehicle. Using a tire with a 
smaller load index could result in tire over -
loading and failure. You could lose control and 
have a collision.
Failure to equip your vehicle with tires having 
adequate speed capability can result in 
sudden tire failure and loss of vehicle control.
22_DT_OM_EN_USC_t.book  Page 454   

SERVICING AND MAINTENANCE455
TIRE TYPES
All Season Tires — If Equipped
All Season tires provide traction for all seasons 
(Spring, Summer, Autumn, and Winter). Traction 
levels may vary between different all season tires. 
All season tires can be identified by the M+S, M&S, 
M/S or MS designation on the tire sidewall. Use all 
season tires only in sets of four; failure to do so 
may adversely affect the safety and handling of 
your vehicle.
Summer Or Three Season Tires — If 
Equipped
Summer tires provide traction in both wet and dry 
conditions, and are not intended to be driven in 
snow or on ice. If your vehicle is equipped with 
Summer tires, be aware these tires are not 
designed for Winter or cold driving conditions. 
Install Winter tires on your vehicle when ambient 
temperatures are less than 40°F (5°C) or if roads 
are covered with ice or snow. For more 
information, contact an authorized dealer. Summer tires do not contain the all season 
designation or mountain/snowflake symbol on the 
tire sidewall. Use Summer tires only in sets of four; 
failure to do so may adversely affect the safety and 
handling of your vehicle.
Snow Tires  
Some areas of the country require the use of snow 
tires during the Winter. Snow tires can be identified 
by a “mountain/snowflake” symbol on the tire 
sidewall.
If you need snow tires, select tires 
equivalent in size and type to the 
original equipment tires. Use snow tires 
only in sets of four; failure to do so may 
adversely affect the safety and handling of your 
vehicle.
Snow tires generally have lower speed ratings than 
what was originally equipped with your vehicle and 
should not be operated at sustained speeds over 
75 mph (120 km/h). For speeds above 75 mph 
(120 km/h) refer to original equipment or an  authorized tire dealer for recommended safe 
operating speeds, loading and cold tire inflation 
pressures.
While studded tires improve performance on ice, 
skid and traction capability on wet or dry surfaces 
may be poorer than that of non-studded tires. 
Some states prohibit studded tires; therefore, local 
laws should be checked before using these tire 
types.
SPARE TIRES — IF EQUIPPED   
NOTE:For vehicles equipped with Tire Service Kit instead 
of a spare tire, please refer to “Tire Service Kit” in 
“In Case Of Emergency” for further information.
For restrictions when towing with a spare tire 
designated for temporary emergency use  
Ú
page 220.
CAUTION!
Replacing original tires with tires of a different 
size may result in false speedometer and 
odometer readings.
WARNING!
Do not use Summer tires in snow/ice conditions. 
You could lose vehicle control, resulting in 
severe injury or death. Driving too fast for 
conditions also creates the possibility of loss of 
vehicle control.
CAUTION!
Because of the reduced ground clearance, do 
not take your vehicle through an automatic car 
wash with a compact or limited use temporary 
spare installed. Damage to the vehicle may 
result.
8
22_DT_OM_EN_USC_t.book  Page 455   

456SERVICING AND MAINTENANCE  
Spare Tire Matching Original Equipped Tire 
And Wheel — If Equipped   
Your vehicle may be equipped with a spare tire and 
wheel equivalent in look and function to the 
original equipment tire and wheel found on the 
front or rear axle of your vehicle. This spare tire 
may be used in the tire rotation for your vehicle. If 
your vehicle has this option, refer to an authorized 
tire dealer for the recommended tire rotation 
pattern.
Compact Spare Tire — If Equipped  
The compact spare is for temporary emergency 
use only. You can identify if your vehicle is 
equipped with a compact spare by looking at the 
spare tire description on the Tire and Loading 
Information Placard located on the driver’s side 
door opening or on the sidewall of the tire. 
Compact spare tire descriptions begin with the 
letter “T” or “S” preceding the size designation. 
Example: T145/80D18 103M.
T, S = Temporary Spare Tire
Since this tire has limited tread life, the original 
equipment tire should be repaired (or replaced) 
and reinstalled on your vehicle at the first 
opportunity. Do not install a wheel cover or attempt to mount a 
conventional tire on the compact spare wheel, 
since the wheel is designed specifically for the 
compact spare tire. Do not install more than one 
compact spare tire and wheel on the vehicle at any 
given time.
Collapsible Spare Tire — If Equipped
The collapsible spare is for temporary emergency 
use only. You can identify if your vehicle is 
equipped with a collapsible spare by looking at the 
spare tire description on the Tire and Loading 
Information Placard located on the driver’s side 
door opening or on the sidewall of the tire.
Collapsible spare tire description
example: 165/80-17 101P.Since this tire has limited tread life, the original 
equipment tire should be repaired (or replaced) 
and reinstalled on your vehicle at the first 
opportunity.
Inflate collapsible tire only after the wheel is 
properly installed to the vehicle. Inflate the 
collapsible tire using the electric air pump before 
lowering the vehicle.
Do not install a wheel cover or attempt to mount a 
conventional tire on the collapsible spare wheel, 
since the wheel is designed specifically for the 
collapsible spare tire.
WARNING!
Compact and collapsible spares are for 
temporary emergency use only. With these 
spares, do not drive more than 50 mph
(80 km/h). Temporary use spares have limited 
tread life. When the tread is worn to the tread 
wear indicators, the temporary use spare tire 
needs to be replaced. Be sure to follow the 
warnings, which apply to your spare. Failure to 
do so could result in spare tire failure and loss of 
vehicle control.
WARNING!
Compact and Collapsible spares are for 
temporary emergency use only. With these 
spares, do not drive more than 50 mph
(80 km/h). Temporary use spares have limited 
tread life. When the tread is worn to the tread 
wear indicators, the temporary use spare tire 
needs to be replaced. Be sure to follow the 
warnings, which apply to your spare. Failure to 
do so could result in spare tire failure and loss of 
vehicle control.
22_DT_OM_EN_USC_t.book  Page 456   

SERVICING AND MAINTENANCE457
Full Size Spare — If Equipped  
The full size spare is for temporary emergency use 
only. This tire may look like the originally equipped 
tire on the front or rear axle of your vehicle, but it is 
not. This spare tire may have limited tread life. 
When the tread is worn to the tread wear 
indicators, the temporary use full size spare tire 
needs to be replaced. Since it is not the same as 
your original equipment tire, replace (or repair) the 
original equipment tire and reinstall on the vehicle 
at the first opportunity.
Limited Use Spare — If Equipped 
The limited use spare tire is for temporary 
emergency use only. This tire is identified by a label 
located on the limited use spare wheel. This label 
contains the driving limitations for this spare. This 
tire may look like the original equipped tire on the 
front or rear axle of your vehicle, but it is not. 
Installation of this limited use spare tire affects 
vehicle handling. Since it is not the same as your 
original equipment tire, replace (or repair) the 
original equipment tire and reinstall on the vehicle 
at the first opportunity.
WHEEL AND WHEEL TRIM CARE   
All wheels and wheel trim, especially aluminum 
and chrome plated wheels, should be cleaned 
regularly using mild (neutral Ph) soap and water to 
maintain their luster and to prevent corrosion. 
Wash wheels with the same soap solution 
recommended for the body of the vehicle and 
remember to always wash when the surfaces are 
not hot to the touch. Your wheels are susceptible to deterioration 
caused by salt, sodium chloride, magnesium 
chloride, calcium chloride, etc., and other road 
chemicals used to melt ice or control dust on dirt 
roads. Use a soft cloth or sponge and mild soap to 
wipe away promptly. Do not use harsh chemicals or 
a stiff brush. They can damage the wheel’s 
protective coating that helps keep them from 
corroding and tarnishing.
When cleaning extremely dirty wheels including 
excessive brake dust, care must be taken in the 
selection of tire and wheel cleaning chemicals and 
equipment to prevent damage to the wheels. 
Mopar® Wheel Treatment or Mopar® Chrome 
Cleaner or their equivalent is recommended or 
select a non-abrasive, non-acidic cleaner for 
aluminum or chrome wheels.
WARNING!
Limited use spares are for emergency use only. 
Installation of this limited use spare tire affects 
vehicle handling. With this tire, do not drive 
more than the speed listed on the limited use 
spare wheel. Keep inflated to the cold tire 
inflation pressures listed on your Tire and 
Loading Information Placard located on the 
driver’s side B-pillar or the rear edge of the 
driver’s side door. Replace (or repair) the original 
equipment tire at the first opportunity and 
reinstall it on your vehicle. Failure to do so could 
result in loss of vehicle control.
CAUTION!
Avoid products or automatic car washes that use 
acidic solutions or strong alkaline additives or 
harsh brushes. Many aftermarket wheel 
cleaners and automatic car washes may 
damage the wheel's protective finish. Such 
damage is not covered by the New Vehicle 
Limited Warranty. Only car wash soap, Mopar® 
Wheel Cleaner or equivalent is recommended.
8
22_DT_OM_EN_USC_t.book  Page 457   

SERVICING AND MAINTENANCE459
(Continued)
(Continued)
4x4 (4WD) Trim Level Axle
Tire/Wheel SizeSnow Traction Device (maximum 
projection beyond tire profile or  equivalent)
Tradesman
Bighorn Lonestar
Laramie Rear
275/65R18
275/55/R20 S Class
Longhorn
Sport
Limited Rear
275/55R20 S Class
REBEL Not Chainable
WARNING!
Using tires of different size and type (M+S, 
Snow) between front and rear axles can cause 
unpredictable handling. You could lose control 
and have a collision.
CAUTION!
To avoid damage to your vehicle or tires, observe 
the following precautions:
Because of restricted traction device clear-
ance between tires and other suspension 
components, it is important that only traction 
devices in good condition are used. Broken 
devices can cause serious damage. Stop the 
vehicle immediately if noise occurs that could 
indicate device breakage. Remove the 
damaged parts of the device before further 
use.
Install device as tightly as possible and then 
retighten after driving about ½ mile (0.8 km). 
Autosock traction devices do not require 
retightening.
Do not exceed 30 mph (48 km/h).
Drive cautiously and avoid severe turns and 
large bumps, especially with a loaded vehicle.
Do not drive for a prolonged period on dry 
pavement.
CAUTION!
8
22_DT_OM_EN_USC_t.book  Page 459   

SERVICING AND MAINTENANCE461
TRACTION GRADES
The Traction grades, from highest to 
lowest, are AA, A, B, and C. These grades 
represent the tire's ability to stop on wet 
pavement, as measured under 
controlled conditions on specified 
government test surfaces of asphalt and 
concrete. A tire marked C may have poor 
traction performance.
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 vehicle tires must meet 
under the Federal Motor Vehicle Safety 
Standard No. 109. Grades B and A 
represent higher levels of performance 
on the laboratory test wheel, than the 
minimum required by law.
STORING THE VEHICLE   
If you are storing your vehicle for more than three 
weeks, we recommend that you take the following 
steps to minimize the drain on your vehicle's 
battery:
Disconnect the negative cable from battery.
Any time you store your vehicle or keep it out of 
service (i.e., vacation) for two weeks or more, 
run the air conditioning system at idle for about 
five minutes in the fresh air and high blower 
setting. This will ensure adequate system lubri-
cation to minimize the possibility of compressor 
damage when the system is started again.
BODYWORK
PROTECTION FROM ATMOSPHERIC 
A
GENTS  
Vehicle body care requirements vary according to 
geographic locations and usage. Chemicals that 
make roads passable in snow and ice and those 
that are sprayed on trees and road surfaces during 
other seasons are highly corrosive to the metal in 
your vehicle. Outside parking, which exposes your 
vehicle to airborne contaminants, road surfaces on 
which the vehicle is operated, extreme hot or cold 
weather and other extreme conditions will have an 
adverse effect on paint, metal trim, and underbody 
protection.
WARNING!
The traction grade assigned to this tire is based 
on straight-ahead braking traction tests, and 
does not include acceleration, cornering, 
hydroplaning, or peak traction characteristics.
WARNING!
The temperature grade for this tire is 
established for a tire that is properly inflated and 
not overloaded. Excessive speed, underinflation, 
or excessive loading, either separately or in 
combination, can cause heat buildup and 
possible tire failure.
8
22_DT_OM_EN_USC_t.book  Page 461   

SERVICING AND MAINTENANCE463
Special Care
If you drive on salted or dusty roads or if you 
drive near the ocean, hose off the undercarriage 
at least once a month.
It is important that the drain holes in the lower 
edges of the doors, rocker panels, and trunk be 
kept clear and open.
If you detect any stone chips or scratches in the 
paint, touch them up immediately.
If your vehicle is damaged due to a collision or 
similar cause that destroys the paint and protec -
tive coating, have your vehicle repaired as soon 
as possible.
If you carry special cargo such as chemicals, 
fertilizers, de-icer salt, etc., be sure that such 
materials are well packaged and sealed.
If a lot of driving is done on gravel roads, 
consider mud or stone shields behind each 
wheel.
Use Mopar® Touch Up Paint on scratches as 
soon as possible. An authorized dealer has 
touch up paint to match the color of your 
vehicle.
Spray-On Bedliner – If Equipped
During ownership, the shine and luster of the 
Spray-On Bedliner can fade from oxidation, road 
dirt, heavy-duty hauling and hard water stains. 
Weathering and UV exposure will lead to fading.
To help maintain the appearance of your Spray-On 
Bedliner, the manufacturer recommends you 
periodically rinse all loose dirt from your truck bed 
and clean your truck at least twice per year using 
the Mopar® Spray-On Bedliner Conditioner 
available at a local authorized dealer. To Help Maintain The Appearance Of Your 
Spray-On Bedliner, Follow The Steps Below:
 
1. Rinse your truck bed out with water to remove  any loose dirt and debris.
2. Mix a mild soap or detergent with water. Then  apply solution with a soft cloth or brush.
3. Rinse bedliner with water.
4. Once dry, apply a small amount of Mopar®  Spray-On Bedliner Conditioner to a moist towel 
or sponge and wipe over the entire surface of 
the truck bedliner.
Spray-On Bedliners are chemically-resistant to 
many different types of chemicals (including 
gasoline, oil, hydraulic fluids) for short periods of 
time. If a spill occurs on your Spray-On Bedliner, 
rinse the truck out as soon as possible to avoid 
permanent damage.
CAUTION!
Do not use scouring pads, steel wool, a bristle 
brush, metal polishes, or oven cleaner. These 
products may damage the bumper’s protec -
tive finish. Such damage is not covered by the 
New Vehicle Limited Warranty. Only car wash 
soap, Mopar® Chrome Cleaner, or equivalent 
is recommended.
Avoid products or automatic car washes that 
use acidic solutions, strong alkaline additives, 
or harsh brushes. Many aftermarket cleaners 
and automatic car washes may damage the 
bumper’s protective finish. Such damage is 
not covered by the New Vehicle Limited 
Warranty. Only car wash soap, Mopar® 
Chrome Cleaner, or equivalent is recom -
mended.
WARNING!
Do not use silicon-based protection products to 
clean your bedliner. Silicon-based products can 
become slippery and may result in personal 
injury.
8
22_DT_OM_EN_USC_t.book  Page 463