differential CHRYSLER ASPEN 2009 2.G Owners Manual

NV 244 Generation II Transfer Case Operating
Information/Precautions ± If Equipped
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 four
mode positions - Normal four-wheel drive (4WD) high
range, four-wheel drive lock (4WD LOCK) range, four-
wheel drive low (4WD LOW) range, and NEUTRAL.
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-surfacedroads. 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 position is selected by
depressing the recessed button located on the lower left
hand corner of the 4WD Control Switch.
STARTING AND OPERATING 285
5

4WD LOCK
This range locks the transfer case inter-axle differential,
forcing the front and rear wheels to rotate at the same
speed. Additional traction for loose, slippery road sur-
faces only.
4WD LOW
This range provides low speed four-wheel drive. It locks
the front and rear driveshafts together, forcing the front
and rear wheels to rotate at the same speed. This range
provides additional traction and maximum pulling
power for loose or slippery road surfaces only. Do not
exceed 25 mph (40 km/h).
N
This range disengages both the front and rear driveshafts
from the powertrain. To be used for flat towing behind
another vehicle. Refer to ªRecreational Towingº in this
section.Shifting Procedure - NV 244 Generation II
Transfer Case
NOTE:The 4x4 system will not allow shifts between
4WD/4WD LOCK if the rear wheels are spinning (no
traction). In this situation, a position indicator light will
flash and the original position indicator light will remain
on. At this time, reduce speed and stop spinning the
288 STARTING AND OPERATING

Traction Control System (TCS)
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. This brake pressure modula-
tion transfers drive torque from slipping to non-slipping
wheels to provide optimal forward traction.
Brake Assist System (BAS)
The BAS is designed to optimize the vehicle's braking
capability during emergency braking maneuvers. The
system detects an emergency braking situation by sens-
ing the rate and amount of brake application and then
applies optimum pressure to the brakes. The system
ESP OFF Switch Location
300 STARTING AND OPERATING

CAUTION!
Damage may result from operation of the vehicle
with low transfer case fluid.
Drain And Refill
Follow the Maintenance Schedule in Section 8 for recom-
mended transfer case fluid change intervals.
Lubricant Selection
For correct fluid type, refer to ºTransfer Caseº under
ªFluids, Lubricants and Genuine Partsº in this section.
Axles
For correct fluid type, refer to ºFront or Rear Axleº under
ªFluids, Lubricants and Genuine Partsº in this section.
Drain And Refill
Follow the Maintenance Schedule in Section 8 for recom-
mended axle fluid change intervals.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 (22 mm) +/- 1/4
in (6 mm) below the fill hole for 8 1/4 in (21 cm) and 9
1/4 (23 cm) in axles should be 1 5/8 in (31 mm) +/- 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.
MAINTAINING YOUR VEHICLE 409
7

Filters
Air Cleaner.......................... 393
Engine Oil........................392,432
Engine Oil Disposal.................... 392
Flashers
Hazard Warning....................... 368
Turn Signal.....................148,204,425
Flat Tire Stowage.....................370,377
Flexible Fuel Vehicles
Cruising Range........................ 343
Engine Oil........................... 343
Fuel Requirements..................340,342
Replacement Parts..................... 343
Starting............................. 343
Flooded Engine Starting................... 276
Floor Console.......................189,192
Fluid, Brake.........................405,433
Fluid Capacities......................... 431Fluid Level Checks
Automatic Transmission................. 406
Brake............................... 405
Engine Oil........................... 390
Power Steering........................ 294
Transfer Case......................... 408
Fluids, Lubricants and Genuine Parts.......... 432
Fog Lights..........................147,429
Folding Rear Seat.....................127,131
Four Wheel Drive....................... 284
Operation........................... 284
Four-Way Hazard Flasher.................. 368
Freeing A Stuck Vehicle................... 379
Front Axle (Differential)................... 409
Fuel................................. 335
Filler Cap (Gas Cap).................344,345
Gauge.............................. 204
Octane Rating......................335,432
Requirements......................335,431
INDEX 465
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Pedals, Adjustable....................... 153
Personal Settings........................ 170
Pets.................................. 74
Pets, Transporting........................ 74
Phone, Cellular.......................... 88
Phone, Hands-Free (UConnectŸ)............. 88
Placard, Tire and Loading Information......... 312
Power
Distribution Center (Fuses)..........385,386,417
Door Locks.........................20,30
Lift Gate............................. 38
Mirrors.............................. 85
Outlet (Auxiliary Electrical Outlet).......185,188
Steering..........................293,294
Steering Filler Cap..................385,386
Sunroof............................. 183
Windows............................. 34
Power Steering Fluid..................... 433
Pregnant Women and Seat Belts.............. 53Preparation for Jacking.................... 372
Pretensioners
Seat Belts............................. 51
Programmable Electronic Features............ 170
Programming Transmitters (Remote Keyless Entry).. 25
Radial Ply Tires......................... 319
Radiator Cap (Coolant Pressure Cap).......400,402
Radio Operation........................ 254
Radio, Satellite.......................246,251
Rear Axle (Differential).................... 409
Rear Camera........................... 163
Rear Cup Holder........................ 192
Rear Liftgate............................ 37
Rear Park Sense System................... 158
Rear Window Defroster................... 196
Rear Window Features.................... 195
Rear Wiper/Washer...................... 195
Rearview Mirrors........................ 84
INDEX 471
10