2008 DODGE DURANGO differential

Because four-wheel-drive provides improved traction,
there is a tendency to exceed safe turning and stopping
speeds. Do not go faster than road conditions permit.
4WD
Normal Four-Wheel-Drive High Range - Employs inter-
axle differential. Allows front and rear wheels to rotate at
different speeds. All road surfaces.
NV 244 Generation II Transfer Case Operating
Information / Precautions
The NV 244 Generation II is an electric shift transfer case
and is operated by the 4WD Control Switch, which is
located on the instrument panel.
The NV 244 Generation II transfer case provides 4 mode
positions - Normal four-wheel-drive (4WD) high range,
four-wheel-drive lock (4WD LOCK), four-wheel-drive
low (4WD LOW) range, and neutral (N).This transfer case is equipped with an inter-axle differ-
ential that allows driving the vehicle in the normal
all-wheel-drive position (4WD) at all times on any given
road surface, including dry hard surfaced roads. The
4WD mode allows the front and rear wheels to rotate at
different speeds. This eliminates driveline binding and
component wear normally associated with driving the
vehicle in the 4WD LOCK position on dry hard surfaced
roads. This feature provides the safety, security, and
convenience of operating in all-wheel drive at all times
regardless of road conditions.
When additional traction is required, the 4WD LOCK
and 4WD LOW positions can be used to lock the front
and rear driveshafts together through the transfer case
inter-axle differential and force the front and rear wheels
to rotate at the same speed. This is accomplished by
rotating the 4WD Control Switch to these positions. The
4WD LOCK and 4WD LOW positions are intended for
loose, slippery road surfaces only. Driving in the 4WD
282 STARTING AND OPERATING

For additional information on the appropriate use of each
transfer case mode position see the following informa-
tion:
4WD
Normal Four-Wheel-Drive High Range - Employs inter-
axle differential. Allows front and rear wheels to rotate at
different speeds. All road surfaces.
4WD LOCK
Four-Wheel-Drive Lock (4WD LOCK)- Locks the transfer
case inter-axle differential. Forces front and rear wheels
to rotate at the same speed. Additional traction for loose,
slippery road surfaces only.4WD LOW
Four-Wheel-Drive Low Range (4WD LOW)- Low speed 4
wheel drive. Locks the transfer case inter-axle differen-
tial. Forces the front and rear wheels to rotate at the same
speed. Additional traction and maximum pulling power
for loose, slippery road surfaces only. Do not exceed 25
mph (40 km/h).
N
Neutral - Disengages both the front and rear driveshafts
from the powertrain. To be used for flat towing behind
another vehicle. See Recreational Towing for more infor-
mation.
STARTING AND OPERATING 285
5

TCS (Traction Control System)
This system monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) and engine
power is reduced to provide enhanced acceleration and
stability. A feature of the TCS system functions similar to
a limited slip differential and controls the wheel spin
across a driven axle. If one wheel on a driven axle is
spinning faster than the other, the system will apply the
brake of the spinning wheel. This will allow more engine
torque to be applied to the wheel that is not spinning.
This feature remains active even if TCS and ESP are in the
ªPartial Offº mode. Refer to ªESP (Electronic Stability
Program)º in this Section of this manual. This brake
pressure modulation transfers drive torque from slipping
to non-slipping wheels to provide optimal forward trac-
tion.
ERM (Electronic Roll Mitigation)
This system anticipates the potential for wheel lift by
monitoring the driver 's steering wheel input and the
speed of the vehicle. When ERM determines that the rate
of change of the steering wheel angle and vehicles speed
are sufficient to potentially cause wheel lift, it applies the
appropriate brake and may reduce engine power to
lessen the chance that wheel lift will occur. ERM will only
intervene during very severe or evasive driving maneu-
vers.
ERM can only reduce the chance of wheel lift occurring
during severe or evasive driving maneuvers. It can not
prevent wheel lift due to other factors such as road
conditions, leaving the roadway or striking objects or
other vehicles.
298 STARTING AND OPERATING

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.
Rear Axle
Rear Axle fluid levels should be 7/8 in. (22mm) +/- 1/4
in. (6 mm) below the fill hole for 8 1/4 in., and 9 1/4 in.
axles should be 1 5/8 in (31mm) +/- 1/4 in. (6 mm)
Front Axle
Front Axle fluid level should be 3/4 in. (20 mm) +/- 1/4
in. (6 mm) below the level of the fill hole.
Appearance Care and Protection from Corrosion
Protection of Body and Paint from Corrosion
Vehicle body care requirements vary according to geo-
graphic locations and usage. Chemicals that make roads
passable in snow and ice, and those that are sprayed ontrees 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 under-
body protection.
The following maintenance recommendations will enable
you to obtain maximum benefit from the corrosion
resistance built into your vehicle.
What Causes Corrosion?
Corrosion is the result of deterioration or removal of
paint and protective coatings from your vehicle.
The most common causes are:
²Road salt, dirt and moisture accumulation.
²Stone and gravel impact.
MAINTAINING YOUR VEHICLE 415
7

Engine Oil........................... 391
Power Steering........................ 399
Transfer Case......................... 414
Fluids, Lubricants and Genuine Parts.......... 440
Fog Lights..........................141,438
Folding Rear Seat.....................123,126
Four Wheel Drive....................... 281
Operation........................... 281
Four-Way Hazard Flasher.................. 366
Freeing A Stuck Vehicle................... 377
Front Axle (Differential)................... 415
Fuel................................. 332
Filler Cap (Gas Cap).................336,338
Filter............................... 396
Gauge.............................. 193
Octane Rating......................332,440
Requirements......................332,439
Tank Capacity........................ 439
Fuel, Flexible.............See Flexible Fuel VehiclesFuel System Caution..................... 338
Fuses.....................180,420,421,424,427
Garage Door Opener (HomeLinkt) ........... 168
Gas Cap (Fuel Filler Cap)............336,338,388
Gas Gauge (Fuel Gauge)................... 193
Gasoline (Fuel)......................... 332
Gasoline, Reformulated................... 333
Gauges
Coolant Temperature.................... 193
Fuel................................ 193
Odometer.........................196,198
Speedometer......................... 195
Tachometer.......................... 196
Gear Ranges........................... 276
General Information.................16,114,332
Glass Cleaning.......................... 419
Gross Axle Weight Rating...............344,347
Gross Cargo Weight...................... 343
468 INDEX

Power
Brakes.............................. 410
Distribution Center (Fuses).......384,385,386,424
Door Locks.........................20,29
Lift Gate............................. 36
Mirrors.............................. 85
Outlet (Auxiliary Electrical Outlet).......... 177
Steering..........................294,399
Steering Filler Cap................384,385,386
Sunroof............................. 174
Windows............................. 33
Power Steering Fluid..................... 441
Pregnant Women and Seat Belts.............. 52
Preparation for Jacking.................... 370
Pretensioners
Seat Belts............................. 50
Programmable Electronic Features............ 162
Programming Transmitters
(Remote Keyless Entry).................... 25Radial Ply Tires......................... 316
Radiator Cap (Coolant Pressure Cap).......404,406
Radio Broadcast Signals................... 205
Radio, Navigation....................... 236
Radio Operation...................206,237,251
Radio Remote Controls.................... 249
Radio, Satellite..............206,207,236,237,244
Radio (Sound Systems).................206,236
Rear Axle (Differential).................... 415
Rear Camera........................... 156
Rear Cup Holder........................ 182
Rear Liftgate............................ 35
Rear Park Sense System................... 152
Rear Window Defroster................... 267
Rear Window Features.................... 266
Rear Wiper/Washer...................... 266
Rearview Mirrors........................ 83
Reclining Front Seats..................... 115
Recorder, Event Data...................... 62
474 INDEX