
speeds will reduce fogging. Interior fogging on the
windshield can be quickly removed by selecting the
defrost mode.
Regular cleaning of the inside of the windows with a
non-filming cleaning solution (vinegar and water works
very well) will help prevent contaminates (cigarette
smoke, perfumes, etc.) from sticking to the windows.
Contaminates increase the rate of window fogging.
Summer Operation
Air conditioned vehicles must be protected with a high
quality antifreeze coolant during summer to provide
proper corrosion protection and to raise the boiling point
of the coolant for protection against overheating. A 50 %
concentration is recommended. Refer to Recommended
Fluids and Genuine Parts for the proper coolant type.
When using the air conditioner in extremely heavy traffic
in hot weather especially when towing a trailer, addi-
tional engine cooling may be required. If this situation isencountered, operate the transmission in a lower gear to
increase engine RPM, coolant flow and fan speed. When
stopped in heavy traffic, it may be necessary to shift into
NEUTRAL and depress the accelerator slightly for fast
idle operation to increase coolant flow and fan speed.
NOTE:On models equipped with Diesel engines, the
idle speed will automatically increase to 1000 rpm at
elevated coolant temperatures to improve engine cooling.
Your air conditioning system is also equipped with an
automatic recirculation system. When the system senses
a heavy load or high heat conditions, it may use partial
Recirculation A/C mode to provide additional comfort.
Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other obstruc-
tions.
UNDERSTANDING YOUR INSTRUMENT PANEL 197
4 

NOTE:The presence of water in the gear lubricant will
result in corrosion and possible failure of differential
components. Operation of the vehicle in water, as may be
encountered in some off-highway types of service, will
require draining and refilling the axle to avoid damage.
Limited-Slip Differentialsin 1500 Model vehicles re-
quire that 4 oz. (118 ml) Mopartlimited slip additive be
added to the gear lubricant. Refer to Recommended
Fluids, Lubricants and Genuine Parts for correct fluid
type. The Mopartlimited slip additive should be added
to the gear lubricant whenever a fluid change is made.
Ram 2500/3500 Model AxlesDO NOT REQUIREany
limited slip oil additive (friction modifiers).Transfer Case
Fluid Level Check
This fluid level can be checked by removing the filler
plug. The fluid level should be to the bottom edge of the
filler plug hole with the vehicle in a level position.
Lubricant Selection
Refer to Recommended Fluids, Lubricants and Genuine
Parts for correct fluid type.
Manual Transmission
Fluid Level Check
This fluid level can be checked by removing the filler
plug. If the level of the lubricant is more than 1/4º (6.4
mm) below the bottom of the filler hole while the vehicle
is on level ground, enough lubricant should be added to
bring the level to the bottom of the filler hole.
MAINTAINING YOUR VEHICLE 351
7 

Lubricant Selection NV-3500 (5-Speed Manual
Transmission Ð If Equipped)
This transmission is filled with manual transmission
fluid at the factory. This fluid does not require periodic
changing. If it is necessary to add or change fluid in this
transmission refer to Recommended Fluids, Lubricants
and Genuine Parts for correct fluid type. This is the only
lubricant recommended for use in the NV-3500 transmis-
sion.
Lubricant Selection NV-4500 (5-Speed Manual
Transmission Ð If Equipped)
This transmission does not require periodic changing. If
it becomes necessary to add or change the fluid in this
transmission, refer to Recommended Fluids, Lubricants
and Genuine Parts for correct fluid type.
Automatic Transmission
Fluid Level Check
The fluid level should be checked when the engine is
fully warmed up and the fluid in the transmission is at
normal operating temperature. Operation of the trans-
mission with an improper fluid level will greatly reduce
the life of the transmission and of the fluid. Check the
fluid level whenever the vehicle is serviced.
Fluid Level Check ± 45RFE/545RFE
Check the fluid level while the transmission is at normal
operating temperature 82ÉC (180ÉF). This occurs after at
least 15 miles (25 km) of driving. At normal operating
temperature the fluid cannot be held comfortably be-
tween the fingertips.
352 MAINTAINING YOUR VEHICLE 

CAUTION!
Be aware that if the fluid temperature is below 50ÉF
(10ÉC) it may not register on the dipstick. Do not add
fluid until the temperature is elevated enough to
produce an accurate reading.
7. Check for leaks. Release parking brake.
To prevent dirt and water from entering the transmission
after checking or replenishing fluid, make certain that the
dipstick cap is properly reseated. It is normal for the
dipstick cap to spring back slightly from its fully seated
position, as long as its seal remains engaged in the
dipstick tube.
Selection Of Lubricant
Refer to Recommended Fluids, Lubricants and Genuine
Parts for correct fluid type. It is important that the
transmission fluid be maintained at the prescribed level
using the recommended fluid.
CAUTION!
Using a transmission fluid other than the manufac-
turers recommended fluid may cause deterioration
in transmission shift quality and/or torque converter
shudder. Using a transmission fluid other than the
manufacturers recommended fluid will result in
more frequent fluid and filter changes. Refer to
Recommended Fluids, Lubricants and Genuine Parts
for correct fluid type.
354 MAINTAINING YOUR VEHICLE 

Automatic Transmission Fluid and Filter Change
To obtain best performance and long life for automatic
transmissions, the manufacturer recommends that they
be given regular maintenance service by an Authorized
Dodge Dealer or Service Center.
It is important that proper lubricant is used in the
transmission. Refer to Recommended Fluids, Lubricants
and Genuine Parts for correct fluid type.
The fluid and filter(s) should be changed as specified in
the Maintenance Schedule (Section 8).
NOTE:If the transmission is disassembled for any
reason, the fluid and filter(s) should be changed.
Special Additives
The manufacturer strongly recommends against the ad-
dition of any additives to the transmission. Exception to
this policy is the use of special dyes to aid in detectingfluid leaks. The use of transmission sealers should be
avoided, since they may adversely affect seals.
Front Wheel Bearings
Front wheel bearings for all Dodge Ram Trucks are
sealed-for-life. They do not require greasing or seal
replacement. In some instances, these bearings will
ªpurgeº excess grease and the bearing will look slightly
wet. This is normal. Periodic inspection for excess play is
recommended.
Rear Wheel Bearings Ð Manufacturer's Axles
These bearings are normally considered permanently
lubricated. Cleaning and repacking is required only
when axle shafts are removed or in case of extreme water
or dust contamination.
MAINTAINING YOUR VEHICLE 355
7 

Adding Fuel........................259,295
Air Cleaner, Engine...................334,357
Air Conditioner Maintenance............327,338
Air Conditioning Refrigerant.......327,328,338,339
Air Conditioning System.............187,327,338
Air Conditioning System, Zone Control........ 191
Air Pressure, Tires....................244,251
Airbag..............................45,50
Airbag Light.........................70,144
Airbag On/Off Switch..................... 50
Airbag, Side............................ 53
Alarm..............................29,147
Alignment and Balance................... 250
Alterations/Modifications, Vehicle............. 7
Antifreeze (Engine Coolant)..............346,379
Anti-Lock Brake System................... 231
Anti-Lock Warning Light...............148,232
Anti-Theft System.....................29,147
Appearance Care........................ 361Ashtray............................... 127
Automatic Transmission
Adding Fluid......................... 353
Fluid and Filter Changes................. 355
Fluid Level Check...................... 352
Fluid Type........................354,382
Shift Indicator........................ 147
Shifting............................. 208
Special Additives...................... 355
Axle Fluid.......................272,350,382
Axle Lubrication.....................272,350
Ball Joints............................. 340
Battery............................... 337
Emergency Starting..................... 312
Bearings.............................. 355
Belts, Drive............................ 333
Belts, Seat.............................. 34
Body Mechanism Lubrication............... 341
414 INDEX