Page 275 of 472

the upper gears. When the vehicle speed drops or during
acceleration when the transmission downshifts to second
gear, the clutch automatically disengages.
NOTE:
• The torque converter clutch will not engage until the
transmission fluid and engine coolant (antifreeze) are
warm [usually after 1 to 3 miles (1.6 to 4.8 km) of
driving]. Because the engine speed is higher when the
torque converter clutch is not engaged, it may seem as
if the transmission is not shifting into Overdrive when
cold. This is normal. Pressing the “TOW/HAUL”
switch when the transmission is sufficiently warm will
demonstrate that the transmission is able to shift into
and out of Overdrive.
• If the vehicle has not been driven in several days, the
first few seconds of operation after shifting the trans-
mission into gear may seem sluggish. This is due to the
fluid partially draining from the torque converter into the transmission. This condition is normal and will not
cause damage to the transmission. The torque con-
verter will refill within five seconds of shifting from
PARK into any other gear position.
FOUR-WHEEL DRIVE OPERATION —
IF EQUIPPED
Four-wheel drive trucks are equipped with either a
manually shifted transfer case or an electronically shifted
transfer case. Refer to the operating instructions for your
transfer case, located in this section for further informa-
tion.
Manually Shifted Transfer Case – If Equipped
The transfer case provides four mode positions.
• Two-wheel drive high range (2H)
• Four-wheel drive high range (4H)
• Neutral (N)274 STARTING AND OPERATING
Page 320 of 472

E-85 Usage In Non-Flex Fuel Vehicles
Non-FFV vehicles are compatible with gasoline contain-
ing 10% ethanol (E10). Gasoline with higher ethanol
content may void the vehicle’s warranty.
If a Non-FFV vehicle is inadvertently fueled with E-85
fuel, the engine will have some or all of these symptoms:
• operate in a lean mode
• OBD II “Malfunction Indicator Light” on
• poor engine performance
• poor cold start and cold drivability
• increased risk for fuel system component corrosion
To fix a Non-FFV vehicle inadvertently fueled once with
E-85 perform the following:
• drain the fuel tank (see your authorized dealer)
• change the engine oil and oil filter • disconnect and reconnect the battery to reset the
engine controller memory
More extensive repairs will be required for prolonged
exposure to E-85 fuel.
MMT In Gasoline
MMT is a manganese containing metallic additive that is
blended into some gasoline to increase octane. Gasoline
blended with MMT provides no performance advantage
beyond gasoline of the same octane number without
MMT. Gasoline blended with MMT reduces spark plug
life and reduces emission system performance in some
vehicles. The manufacturer recommends that gasoline
without MMT be used in your vehicle. The MMT content
of gasoline may not be indicated on the gasoline pump,
therefore, you should ask your gasoline retailer whether
or not the gasoline contains MMT. It is even more
important to look for gasolines without MMT in Canada,
because MMT can be used at levels higher than those
5 STARTING AND OPERATING 319
Page 363 of 472

7. Install wheel center cap (if equipped) and remove
wheel blocks. Do not install chrome or aluminum wheel
center caps on the spare wheel. This may result in cap
damage.
8. Lower the jack to its fully closed position. If the jack
will not lower by turning the dial (thumbwheel) by hand,
it may be necessary to use the jack drive tube in order to
lower the jack. Stow the replaced tire, jack, and tools as
previously described.
9. Adjust the tire pressure when possible.
NOTE: Do not oil wheel studs. For chrome wheels, do
not substitute with chrome plated wheel nuts.
Hub Caps/Wheel Covers — If Equipped
The hub caps must be removed before raising the vehicle
off the ground. CAUTION!Use extreme caution when removing the front and
rear center caps. Damage can occur to the center cap
and/or the wheel if screwdriver type tools are used. A
pulling motion, not a pry off motion, is recom-
mended to remove the caps.
For single rear wheel (SRW) models, use the blade on the
end of the lug wrench to pry the hub cap off. Insert the
blade end into the pry off notch and carefully pop off the
hub cap with a back and forth motion.
On 3500 models with dual rear wheels (DRW), you must
first remove the hub caps. The jack handle driver has a
hook at one end that will fit in the pry off notch of the
rear hub caps. Position the hook and pull out on the
ratchet firmly. The hub cap should pop off. The wheel
skins can now be removed. For the front hub cap on
models use the blade on the end of the lug wrench to pry
the caps off. The wheel skin can now be removed.362 WHAT TO DO IN EMERGENCIES
Page 376 of 472
MAINTAINING YOUR VEHICLECONTENTS Engine Compartment — 5.7L ............. 377
Onboard Diagnostic System (OBD II) ....... 378
▫ Loose Fuel Filler Cap Message ........... 378
Emissions Inspection And Maintenance
Programs ............................ 379
Replacement Parts ..................... 380
Dealer Service ........................ 380
Maintenance Procedures ................. 381
▫ Engine Oil ......................... 382 ▫ Engine Oil Filter ..................... 384
▫ Engine Air Cleaner Filter ............... 384
▫ Maintenance-Free Battery .............. 385
▫ Air Conditioner Maintenance ............ 387
▫ Front Prop Shaft Lubrication – Four-Wheel
Drive Models ....................... 388
▫ Body Lubrication .................... 388
▫ Windshield Wiper Blades ............... 389
▫ Adding Washer Fluid ................. 389
7
Page 389 of 472

NOTE: Use only manufacturer approved A/C System
Sealers, Stop Leak Products, Seal Conditioners, Compres-
sor Oil, or Refrigerants.
Refrigerant Recovery and Recycling
R-134a Air Conditioning Refrigerant is a hydrofluoro-
carbon (HFC) that is endorsed by the Environmental
Protection Agency (EPA) and is an ozone-saving product.
However, the manufacturer recommends that air condi-
tioning service be performed by authorized dealers or
other service facilities using recovery and recycling
equipment.
Front Prop Shaft Lubrication – Four-Wheel Drive
Models
Lubricate the front driveshaft grease fitting at each oil
change. Refer to “Maintenance Schedule” for the proper
maintenance intervals. Use MOPAR Type MS-6560
(lithium-based grease), or equivalent. Body Lubrication
Locks and all body pivot points, including such items as
seat tracks, door hinge pivot points and rollers, liftgate,
tailgate, sliding doors and hood hinges, should be lubri-
cated periodically with a lithium based grease, such as
MOPAR Spray White Lube or equivalent, to assure
quiet, easy operation and to protect against rust and
wear. Prior to the application of any lubricant, the parts
concerned should be wiped clean to remove dust and
grit. After lubricating, excess oil and grease should be
removed. Particular attention should also be given to
hood latching components to ensure proper function.
When performing other underhood services, the hood
latch, release mechanism and safety catch should be
cleaned and lubricated.
The external lock cylinders should be lubricated twice a
year, preferably in the Fall and Spring. Apply a small388 MAINTAINING YOUR VEHICLE