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SNOW TIRES
Snow tires should be of the same size and type construc-
tion as the front tires. Consult the manufacturer of the
snow tire to determine any maximum vehicle speed
requirement associated with the tire. These tires should
always be operated at the vehicle maximum capacity
inflation pressures under any load condition.
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 pro-
hibit studded tires; therefore, local laws should be
checked before using these tire types.
TIRE ROTATION RECOMMENDATIONS
Tires on the front and rear axles of vehicles operate at
different loads and perform different steering, driving,
and braking functions. For these reasons, they wear at
unequal rates, and develop irregular wear patterns.
These effects can be reduced by timely rotation of tires.
The benefits of rotation are especially worthwhile with
aggressive tread designs such as those on On/Off Road
type tires. Rotation will increase tread life, help to main-
tain mud, snow, and wet traction levels, and contribute to
a smooth, quiet ride.
Follow the recommended tire rotation frequency for your
type of driving found in the “Maintenance Schedules”
Section of this manual. More frequent rotation is permis-
sible if desired. The reasons for any rapid or unusual
wear should be corrected prior to rotation being per-
formed.
280 STARTING AND OPERATING
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Consider the following items when computing the
weight on the rear axle:
•the tongue weight of the trailer
•the weight of any other type of cargo or equipment put
in or on your vehicle
NOTE:Remember that everything put into or on the
trailer adds to the load on your vehicle. Also, additional
factory-installed options, or dealer-installed options,
must be considered as part of the total load on your
vehicle. Refer to the Certification label located at the
driver’s door for the Gross Vehicle Weight Rating.
WARNING!
Improper towing can lead to an injury accident.
Follow these guidelines to make your trailer towing
as safe as possible:
Perform the maintenance listed in the “Maintenance
Schedules” section of this manual (Section 8). When
towing a trailer, never exceed the Gross Axle Weight
Rating (GAWR), or Gross Combined Vehicle Weight
(GCVW).
CAUTION!
When hauling cargo or towing a trailer, do not
overload your vehicle or trailer. Overloading can
cause a loss of control, poor performance or damage
to brakes, axle, engine, transmission, steering, sus-
pension, body structure or tires.
STARTING AND OPERATING 297
5
Page 320 of 456
HAZARD WARNING LIGHTS
The Hazard Warning switch is mounted on the top of the
steering column as shown in the illustration.
To engage the Hazard Warning lights, depress the button
on the top of the steering column. When the Hazard
Warning switch is activated, all directional turn signalswill flash off and on to warn oncoming traffic of an
emergency. Push the button a second time to turn off the
flashers.
This is an emergency warning system and should not be
used when the vehicle is in motion. Use it when your
vehicle is disabled and is creating a safety hazard for
other motorists.
When you must leave the vehicle to seek assistance, the
Hazard Warning lights will continue to operate even
though the ignition switch is OFF.
NOTE:With extended use, the Hazard Warning lights
may discharge your battery.
320 WHAT TO DO IN EMERGENCIES
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▫Air Conditioner Maintenance.............362
▫Power Steering — Fluid Check............363
▫Front Suspension Ball Joints..............364
▫Steering Linkage — Inspection............365
▫Half-Shaft Constant Velocity Joints.........365
▫Front Prop Shaft Lubrication — 2500/3500
(4X4) Models........................365
▫Body Lubrication.....................366
▫Windshield Wiper Blades................366
▫Windshield Washers...................366
▫Exhaust System......................367
▫Cooling System.......................368
▫Hoses And Vacuum/Vapor Harnesses.......372▫Brake System........................372
▫Clutch Hydraulic System................374
▫Clutch Linkage.......................374
▫Rear Axle And 4X4 Front Driving Axle
Fluid Level..........................374
▫Transfer Case........................375
▫Manual Transmission..................376
▫Automatic Transmission................377
▫Front Wheel Bearings..................380
▫Selection Of Lubricating Grease...........380
▫Noise Control System Required Maintenance &
Warranty For 3500 2-Wheel Drive And 4-Wheel
Drive Models Over 10,000 Lbs. (4 535 Kg)
Gross Vehicle Weight Rating..............381
346 MAINTAINING YOUR VEHICLE
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NOTE:Refer to Section 3 of the Warranty Information
book for further warranty information.
WARNING!
•Use only refrigerants and compressor lubricants
approved by the manufacturer for your air condi-
tioning system. Some unapproved refrigerants are
flammable and can explode, injuring you. Other
unapproved refrigerants or lubricants can cause
the system to fail, requiring costly repairs.
•The air conditioning system contains refrigerant
under high pressure. To avoid risk of personal
injury or damage to the system, adding refrigerant
or any repair requiring lines to be disconnected
should be done by an experienced repairman.
Refrigerant Recovery and Recycling
R-134a Air Conditioning Refrigerant is a hydrofluorocar-
bon (HFC) that is endorsed by the Environmental Pro-
tection Agency and is an ozone-saving product. How-
ever, the manufacturer recommends that air conditioning
service be performed by dealers or other service facilities
using recovery and recycling equipment.
Power Steering — Fluid Check
Checking the power steering fluid level at a defined
service interval is not required. The fluid should only be
checked if a leak is suspected, abnormal noises are
apparent, and/or the system is not functioning as antici-
pated. Coordinate inspection efforts through a certified
DaimlerChrysler Dealership.
MAINTAINING YOUR VEHICLE 363
7
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WARNING!
Fluid level should be checked on a level surface and
with the engine off to prevent injury from moving
parts and to insure accurate fluid level reading. Do
not overfill. Use only manufacturers recommended
power steering fluid.
If necessary, add fluid to restore to the proper indicated
level. With a clean cloth, wipe any spilled fluid from all
surfaces. Refer to Recommended Fluids, Lubricants, and
Genuine Parts for correct fluid type.
Front Suspension Ball Joints
4 x 2 Models
The ball joints and seals should be inspected whenever
the vehicle is serviced for other reasons.
The ball joints originally supplied with the vehicle are
permanently lubricated at the factory and do not require
service. However, if the seals on the ball joints are
damaged, the joints should be replaced. Serviceable
replacement ball joints are available.
Front suspension ball joints should be replaced only by a
qualified service technician using tools specially de-
signed for this purpose. Damage to the joints and/or
suspension components may result if improper replace-
ment procedures are used.
If seals are damaged the ball joints should be replaced to
prevent leakage or contamination of the grease.
364 MAINTAINING YOUR VEHICLE
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Steering Linkage — Inspection
Whenever the vehicle is hoisted, all steering linkage
joints should be inspected for evidence of damage. If
seals are damaged, parts should be replaced to prevent
leakage or contamination of the grease. Lubricate the
steering linkage regularly according to the “Maintenance
Schedule” in this manual.
Half-shaft Constant Velocity Joints
All four- wheel- drive 1500 models are equipped with
four constant velocity joints. Periodic lubrication of these
joints is not required. However, the joint boots should be
inspected for external leakage or damage periodically. If
external leakage or damage is evident, the joint boot and
grease should be replaced immediately. Continued op-
eration could result in failure of the joint due to water
and dirt contamination of the grease. This would require
complete replacement of the joint assembly. Refer to the
Service Manual for the detailed replacement procedure.
Front Prop Shaft Lubrication — 2500/3500 (4X4)
Models
Lubricate the front driveshaft grease fitting at each oil
change listed in the appropriate Maintenance Schedule
for your vehicle (Schedule “A” and “B”). Use Mopar
type MS-6560 (lithium based grease), or equivalent.
Front Driveshaft Grease Fitting
MAINTAINING YOUR VEHICLE 365
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Chassis
Component Fluids, Lubricants and Genuine Parts.
Automatic Transmission MoparATF+4, Automatic Transmission Fluid or or equivalent.
Transfer Case MoparATF+4, Automatic Transmission Fluid or equivalent.
Manual Transmission Fluid NV 4500 75W-85 Synthetic, API grade GL4, MoparP/N 4874459 or equivalent.
Manaul Transmission Fluid (G238). MoparATF+4, Automatic Transmission Fluid or equivalent.
Manual Transmission Fluid (G-56) MoparATF+4, Automatic Transmission Fluid or equivalent.
Clutch Linkage Multipurpose Grease, NLGI Grade 2 E.P. or equivalent.
1500 Model Front Axle (4X4) GL-5 SAE 75W-90 or equivalent.
1500 Model Rear Axle MoparSynthetic Gear Lubricant SAE 75W-140 (MS-8985). Limited-Slip
Rear Axles on 1500 Models Require the addition of 118 ml (4 oz.) Mopar
limited slip additive or equivalent.
2500/3500 Model Front and Rear
AxleSynthetic, GL-5 SAE, 75W-90 or equivalent. Limited-Slip 10.5/11.5 inch
Rear AxlesDO NOT REQUIREa limited slip additive.
Brake Master Cylinder MoparDOT 3 and SAE J1703 should be used or equivalent. If DOT 3
brake fluid is not available, then DOT 4 is acceptable. Use only recom-
mended brake fluids.
Power Steering Reservoir MoparATF+4, Automatic Transmission Fluid or equivalent.
406 MAINTAINING YOUR VEHICLE