2007 DODGE DURANGO differential

shift to take place. Shifting while only the front or rear
wheels are spinning can cause damage to the transfer
case.
Proper operation of four-wheel-drive vehicles depends
on tires of equal size, type and circumference on each
wheel. Any difference in tire size can cause damage to the
transfer case.
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.
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 front
and rear driveshafts together. Forces the front and rear
wheels to rotate at the same speed. Additional traction
for loose, slippery road surfaces only.
STARTING AND OPERATING 261
5

If the key is not ON then the shift will not take place and
no position indicator lights will be on or flashing.
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 thevehicle 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
LOCK and 4WD LOW positions on dry hard surfaced
roads may cause increased tire wear and damage to the
driveline components.
The transfer case Neutral (N) position is selected by
depressing the recessed button located on the lower left
hand corner of the 4WD Control Switch.
STARTING AND OPERATING 263
5

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.
266 STARTING AND OPERATING

WARNING!
•BAS cannot prevent the natural laws of physics
from acting on the vehicle, nor can it increase
braking efficiency beyond that afforded by the
condition of the vehicle brakes and tires or the
traction afforded.
•The BAS cannot prevent accidents, including
those resulting from excessive speed in turns,
following another vehicle too closely, or hydro-
planing. Only a safe, attentive, and skillful driver
can prevent accidents.
•The capabilities of a BAS-equipped vehicle must
never be exploited in a reckless or dangerous
manner which could jeopardize the user ’s safety
or the safety of others.
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
“Partial Off” mode. Refer to “ESP (Electronic Stability
Program)” 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.
STARTING AND OPERATING 277
5

Axles
Refer to Fluids, Lubricants and Genuine Parts for correct
fluid type.
The manufacturer does not recommend regularly sched-
uled oil changes for axles in vehicles whose operation is
classified as normal truck service.
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 1/4(6.4 mm) +/- 1/4“
below the fill hole for 8 1/4, and 9 1/4axles.
Front Axle
Front Axle fluid level should be 1/4” (6.4 mm) below the
level of the fill hole.
Selection of Lubricating Grease
The National Lubricating Grease Institute (NLGI) has
developed a symbol (Certification Mark) to aid the
vehicle owner in the proper selection of grease for chassis
components. This symbol, an example shown below, is
located on the grease container and identifies the appli-
cation and quality of the grease.
There are two groups
identified, those for wheel
bearings (Letter “G”) and
those for chassis (Letter
“L”) lubrication. Perfor-
mance categories within
these groups result in dual
letter designations for
each group. The letter des-
ignations shown in the ex-
ample are the highest
quality level available and when combined as shown can
392 MAINTAINING YOUR VEHICLE

Flashers
Hazard Warning....................... 344
Turn Signal.....................135,185,409
Flat Tire Stowage.....................346,352
Flexible Fuel Vehicles
Cruising Range........................ 319
Engine Oil........................... 318
Fuel Requirements..................317,318
Maintenance.......................... 319
Replacement Parts..................... 319
Starting............................. 318
Flooded Engine Starting................... 252
Floor Console.......................172,174
Fluid, Brake.........................387,419
Fluid Capacities......................... 417
Fluid Level Checks
Automatic Transmission................. 389
Brake............................... 387
Engine Oil........................... 367Power Steering........................ 377
Transfer Case......................... 391
Fluids, Lubricants and Genuine Parts.......... 418
Fog Lights..........................135,415
Folding Rear Seat..................... 117,120
Four Wheel Drive....................... 259
Operation........................... 259
Four-Way Hazard Flasher.................. 344
Freeing A Stuck Vehicle................... 284
FrontAxle(Differential) ................... 392
Fuel................................. 310
Filler Cap (Gas Cap).................... 314
Filter ............................... 372
Gauge.............................. 185
Octane Rating......................310,418
Requirements......................310,417
Tank Capacity........................ 417
Fuel, Flexible.............See Flexible Fuel Vehicles
Fuel System Caution..................... 316
INDEX 463
10

Parking On Hill......................... 269
Passing Light........................... 137
Pedals, Adjustable....................... 142
Personal Settings........................ 155
Pets.................................. 71
Pets, Transporting........................ 71
Phone, Cellular.......................... 84
Phone, Hands-Free (UConnect™)............. 84
Placard, Tire and Loading Information......... 289
Positive Crankcase Valve.................. 387
Power
Brakes.............................. 387
Distribution Center (Fuses).......360,361,362,402
Door Locks......................... 19,28
Lift Gate............................. 35
Mirrors .............................. 81
Outlet (Auxiliary Electrical Outlet).......169,170
Steering..........................273,377
Steering Filler Cap................360,361,362Sunroof............................. 167
Windows............................. 31
Power Steering Fluid..................... 419
Pregnant Women and Seat Belts.............. 50
Preparation for Jacking.................... 348
Pretensioners
Seat Belts............................. 48
Programmable Electronic Features......155,162,165
Programming Transmitters
(Remote Keyless Entry)............... 23,162,165
Radial Ply Tires......................... 297
Radiator Cap (Coolant Pressure Cap).......381,383
Radio Broadcast Signals................... 196
Radio, Navigation....................... 219
Radio Operation...................197,205,229
Radio, Satellite.......................219,223
Radio (Sound Systems).................197,205
Rear Axle (Differential).................... 392
INDEX 469
10