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Tire Pressures for High Speed Operation
The manufacturer advocates driving at safe speeds
within posted speed limits. Where speed limits or condi-
tions are such that the vehicle can be driven at high
speeds, maintaining correct tire inflation pressure is very
important. Increased tire pressure and reduced vehicle
loading may be required for high speed vehicle opera-
tion. Refer to original equipment or an authorized tire
dealer for recommended safe operating speeds, loading
and cold tire inflation pressures.
WARNING!
High speed driving with your vehicle under maximum
load is dangerous. The added strain on your tires could
cause them to fail. You could have a serious accident.
Don’t drive a vehicle loaded to the maximum capacity
at continuous speeds above 75 mph (120 km/h).
Radial-Ply Tires
WARNING!
Combining radial ply tires with other types of tires
on your vehicle will cause your vehicle to handle
poorly. The instability could cause an accident. Al-
ways use radial ply tires in sets of four (or 6, in case
of trucks with dual rear wheels). Never combine
them with other types of tires.
Cuts and punctures in radial tires are repairable only in
the tread area because of sidewall flexing. Consult your
authorized tire dealer for radial tire repairs.
STARTING AND OPERATING 141
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Page 143 of 264

These indicators are molded into the bottom of the tread
grooves and will appear as bands when the tread depth
becomes 1/16 inch (2 mm). When the indicators appear
in 2 or more adjacent grooves, the tire should be replaced.
Many states have laws requiring tire replacement at this
point.
Life of Tire
The service life of a tire is dependent upon varying
factors including but not limited to:
•Driving style
•Tire pressure
•Distance driven
WARNING!
Tires and 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 an accident result-
ing in serious injury or death.
Keep unmounted 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 pressure. The manu-
facturer strongly recommends that you use tires equiva-
lent to the originals in size, quality and performance
when replacement is needed (see the paragraph on tread
STARTING AND OPERATING 143
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Although the tires are designed with a “run flat” feature
that allows the vehicle to be driven about 50 miles (80
km) at 55 m.p.h. (88 kph), immediate service should be
obtained if the Low Tire indicator is activated.
WARNING!
Do not exceed 55 m.p.h. (88 k.p.h.) if the LOW Tire
indicator in the instrument cluster is illuminated.
Vehicle handling and braking may be reduced. You
could have an accident and be severely or fatally
injured.
NOTE:The “run flat” feature eliminates the need for a
spare tire and jack. This vehicle is not equipped with
either a spare tire or jack.
CAUTION!
The Low Tire Pressure (LTP) system has been opti-
mized for the original equipment tires and wheels.
The LTP system pressures have been established for
the tire size equipped on your vehicle. Undesirable
operation or sensor damage may result when using
replacement equipment that is not of the same size,
type, and/or style. After-market wheels can cause
sensor damage. Do not use tire sealant or balance
beads if your vehicle is equipped with the LTP
system as damage to the sensors may result.
146 STARTING AND OPERATING
Page 162 of 264

DRIVING ON SLIPPERY SURFACES
WARNING!
Rapid acceleration on slippery surfaces is danger-
ous. You could lose control of the vehicle and possi-
bly have an accident. Accelerate slowly and carefully
whenever there is likely to be poor traction (ice,
snow, wet, mud, loose sand, etc.).
Traction
When driving on wet or slushy roads, it is possible for a
wedge of water to build up between the tire and road
surface. This is hydroplaning and may cause partial or
complete loss of vehicle control and stopping ability. To
reduce this possibility, the following precautions should
be observed:
•Slow down during rainstorms or when roads are
slushy.
•Slow down if road has standing water or puddles.
CAUTION!
Driving your Viper through deep puddles at speeds
over 5 mph, may cause water to be ingested into the
engine. This can cause severe engine damage.
•Replace tires when tread wear indicators first become
visible.
•Keep tires properly inflated.
•Maintain enough distance between your vehicle and
the vehicle in front to avoid a collision in a sudden
stop.
162 WHAT TO DO IN EMERGENCIES
Page 163 of 264
FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand or snow, it
can often be moved by a rocking motion. Turn your
steering wheel right and left to clear the area around the
front wheels. Then shift back and forth between Reverse
and First gear. Usually the least accelerator pedal pres-
sure to maintain the rocking motion without spinning the
wheels is most effective.
CAUTION!
Racing the engine or spinning the wheels too fast
may lead to transmission/axle overheating and fail-
ure. It can also damage the tires. Do not spin the
wheels above 30 mph (48 km/h).
TOWING A DISABLED VEHICLE
Do not tow with sling type equipment. Only use flat bed
equipment. Always comply with applicable state or local
towing ordinances.
CAUTION!
Towing with equipment other than flat bed types
may damage your vehicle.
WHAT TO DO IN EMERGENCIES 163
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Page 210 of 264

Check the battery every 4 to 6 weeks to ensure that the
voltage is above 12.40. Voltage will drop more rapidly
in hot temperatures. If battery voltage drops below
12.40, follow the battery recharge procedure in the
Service Manual.
•Check that the radiator coolant level of protection is to
at least -20°F (-29°C).
•Block the wheels. Do not apply the Parking Brake.
•Make sure that all tires are inflated to the optimum
pressure, (29 PSI).
•Cut blocks of plywood about the same size of the tires.
Cover each block with indoor/outdoor carpeting and
place them between the tires and concrete. This will
prevent tire flat spotting.
•For long term storage, remove the tires and put the
vehicle up on blocks. Stack the tires on plywood and
cover with a tarp to prevent flat spotting.
•Move the wiper blades away from the windshield.
NOTE:To help prevent the battery from discharging
during shorter periods of inactivity, perform the follow-
ing:
1. Make sure that the trunk/liftgate, hood, doors, win-
dows and convertible top are completely closed.
2. Make sure that remote transmitter is operating and
that the battery is good.
3. Make sure that the hood, trunk/liftgate and door
switches are in adjustment. Perform the quick system
check which follows.
Use the remote transmitter to set the alarm. If the alarm
SET light comes on and flashes, the system is operating
properly. If not, there is a problem with a switch or the
system. See your dealer for service.
210 MAINTAINING YOUR VEHICLE
Page 248 of 264

Traction Grades
The traction grades, from highest to lowest, are A, B, and C,
and they represent the tire’s ability to stop on wet pave-
ment as measured under controlled conditions on specified
government test surfaces of asphalt and concrete. A tire
marked C may have poor traction performance.
WARNING!
The traction grade is based on braking (straight-
ahead) traction tests and does not include cornering
(turning) performance.
Temperature Grades
The temperature grades are A (highest), B, and C, repre-
senting 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 thetire 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 passen-
ger car 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.
WARNING!
The temperature grade 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.
248 IF YOU NEED CONSUMER ASSISTANCE
Page 259 of 264

Power
Accessory Delay......................14,28
Brakes.............................. 125
Distribution Center..................... 203
Steering..........................129,185
Windows............................. 27
Pregnant Women and Seat Belts.............. 35
Programming Transmitters.................. 19
Radial Ply Tires......................... 141
Radiator Cap (Coolant Pressure Cap).......... 192
Radio Antenna.......................... 111
Radio Broadcast Signals.................... 98
Radio Operation......................... 111
Radio, Satellite.......................... 106
Radio (Sound Systems).................... 99
Rear Axle............................. 199
Rear Liftgate............................ 26
Rear Wheel Bearings..................... 200Rearview Mirrors........................ 69
Reclining Front Seats...................... 73
Reformulated Gasoline.................... 149
Refrigerant............................ 185
Reminder, Lights On...................... 78
Reminder, Seat Belt.....................33,93
Remote Keyless Entry..................... 16
Replacement Parts....................... 171
Replacement Tires....................... 143
Reporting Safety Defects................... 245
Restraints, Child......................... 36
Restraints, Infant......................... 36
Restraints, Occupant...................... 29
Rocking Vehicle When Stuck................ 163
Rotation, Tires.......................... 147
Run Flat Feature........................ 146
Safety Checks Inside Vehicle................. 53
Safety Checks Outside Vehicle............... 54
INDEX 259
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