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FOUR-WHEEL DRIVE OPERATION — IF EQUIPPED
NV233/243 GII Transfer Case Operating
Information/Precautions
The NV233/243 is an electric-shift transfer case and is
operated by the transfer case switch, which is located on
the instrument panel.The NV233/243 transfer case provides four mode posi-
tions:
•Two-wheel drive high range (2WD)
•Four-wheel drive lock range (4WD LOCK)
•Four-wheel drive low range (4WD LOW)
•Neutral (N)
The NV233/243 transfer case is designed to be driven in
the two-wheel drive position (2WD) for normal street
and highway conditions on dry hard-surfaced roads.
When additional traction is required, the transfer case
4WD LOCK and 4WD LOW positions can be used to lock
the front and rear driveshafts together and force the front
and rear wheels to rotate at the same speed. This is
accomplished by turning the transfer case switch to the
desired position - Refer to “Shifting Procedure” for
further information. The 4WD LOCK and 4WD LOW
Transfer Case Switch
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positions are designed for loose or slippery road surfaces
only. Driving in the 4WD LOCK and 4WD LOW posi-
tions on dry hard-surfaced roads may cause increased
tire wear and damage to the driveline components.
NOTE:The transfer case NEUTRAL position is selected
by pressing the recessed button located on the lower
left-hand corner of the transfer case switch. The transfer
case NEUTRAL position is to be used for recreational
towing only. Refer to “Recreational Towing” in “Starting
and Operating” for further information.
Transfer Case Position Indicator Lights
The Transfer Case Position Indicator Lights (4WD and
4LOW) are located on the instrument cluster. If there is
no indicator light on or flashing, the transfer case is in
two-wheel drive (2WD). If the indicator light is on, the
desired position (4WD LOCK and 4WD LOW) has been
obtained. If one or more shift requirements are not met:
1. An indicator light will flash.
2. The transfer case
will notshift.
NOTE: Before retrying a selection, make certain that all
the necessary requirements for selecting a new transfer
case position have been met. To retry the selection, turn
the transfer case switch back to the current position, wait
five seconds, and retry selection. To find the shift require-
ments, refer to the Shifting Procedurefor further
information.
The “SVC 4WD Warning Light” monitors the electronic
shift four-wheel drive system. If this light remains on
after engine start-up or illuminates during driving, it
means that the four-wheel drive system is not function-
ing properly and that service is required.
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WARNING!
Always engage the parking brake when powering
down the vehicle if the “SVC 4WD Warning Light” is
illuminated. Not engaging the parking brake may
allow the vehicle to roll, which may cause personal
injury.
NOTE: Do not attempt to make a shift while only the
front or rear wheels are spinning. The NV233/243 trans-
fer case is not equipped with a synchronizer and there-
fore the front and rear driveshaft speeds must be equal
for the shift to take place. Shifting while only the front or
rear wheels are spinning can cause damage to the trans-
fer case. When operating your vehicle in 4WD LOW, the engine
speed is approximately three times that of the 2WD or
4WD LOCK positions at a given road speed. Take care
not to overspeed the engine and do not exceed 25 mph
(40 km/h).
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.
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WARNING!
You or others could be injured if you leave the
vehicle unattended with the transfer case in the
NEUTRAL position without first fully engaging the
parking brake. The transfer case NEUTRAL position
disengages both the front and rear driveshafts from
the powertrain and will allow the vehicle to move
regardless of the transmission position. The parking
brake should always be applied when the driver is
not in the vehicle.
For additional information on the appropriate use of each
transfer case mode position, refer to the following infor-
mation:
2WD
Rear-Wheel Drive High — This range is used for normal
street and highway driving on dry, hard-surfaced roads. 4WD LOCK
Four-Wheel Drive Lock — This range locks the front and
rear driveshafts together forcing the front and rear wheels
to rotate at the same speed. This range provides addi-
tional traction for loose or slippery road surfaces only.
4WD LOW
Four-Wheel Drive 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
Neutral — This range disengages both the front and rear
driveshafts from the powertrain, and is used for flat
towing behind another vehicle. Refer to “Recreational
Towing” in “Starting and Operating” for further
information.
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Shifting Procedure – NV233/243 Transfer Case
NOTE:If any of the requirements to select a new
transfer case position have not been met, the transfer case
will not shift, the indicator light for the previous position
will remain ON, and the newly-selected position indica-
tor light will continue to flash until all the requirements
for the selected position have been met. To retry a shift:
return the transfer case switch back to the original
position, make certain all shift requirements have been
met, wait five seconds, and try the shift again.
2WD-to-4WD LOCK or 4WD LOCK-to-2WD
Turn the transfer case switch to the desired position.
Shifts between 2WD and 4WD LOCK can be done with
the vehicle stopped, or in motion. With the vehicle in
motion, the transfer case will engage/disengage faster if
you momentarily release the accelerator pedal after turn-
ing the transfer case switch. If the vehicle is stopped, the ignition key must be in the ON position with the engine
either running or OFF. This shift cannot be completed if
the key is in the ACC position.
NOTE:
On vehicles equipped with Anti-Lock Brake
Systems, the four-wheel drive system will not allow
shifts between 2WD/ 4WD LOCK if the rear wheels are
spinning (no traction). In this situation, the selected
position indicator light will flash and the original posi-
tion indicator light will remain ON. At this time, reduce
speed and stop spinning the wheels to complete the shift.
There may be a delay up to 10 seconds for the shift to
complete after the wheels have stopped spinning.
4WD LOCK-to-4WD LOW or 4WD LOW-to-4WD
LOCK
NOTE: When shifting into or out of 4WD LOW, some
gear noise may be heard. This noise is normal and is not
detrimental to the vehicle or occupants.
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LIMITED-SLIP REAR AXLE DIFFERENTIAL — IF
EQUIPPED
The limited-slip differential provides additional traction
on snow, ice, mud, sand and gravel. It improves traction
when there is a difference between the characteristics of
the surface under the right and left rear wheels. During
normal driving and cornering, the limited-slip unit is
similar to a conventional differential. But on a slippery
surface, the differential delivers more of the driving effort
to the wheel having the better traction.
WARNING!
On vehicles equipped with a limited-slip differen-
tial, never run the engine with one rear wheel off the
ground. The vehicle may drive through the rear
wheel remaining on the ground and cause you to lose
control of the vehicle.Care should be taken to avoid sudden accelerations when
both rear wheels are on a slippery surface. This could
cause both rear wheels to spin, and allow the vehicle to
slide sideways on the crowned surface of a road or in a
turn.
DRIVING ON SLIPPERY SURFACES
When driving on wet or slushy roads, it is possible for a
wedge of water to build up between the tire and road
surface. This is known as hydroplaning and may cause
partial or complete loss of vehicle control and stopping
ability. To reduce this possibility, the following precau-
tions should be observed:
1. Slow down during rainstorms or when roads are
slushy.
2. Slow down if the road has standing water or puddles.
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WARNING!
•Driving through standing water limits your vehi-
cle’s traction capabilities. Do not exceed 5 mph
(8 km/h) when driving through standing water.
•Driving through standing water limits your vehi-
cle’s braking capabilities, which increases stop-
ping distances. Therefore, after driving through
standing water, drive slowly and lightly press on
the brake pedal several times to dry the brakes.
•Getting water inside your vehicle’s engine can
cause it to lock up and stall out, and leave you
stranded.
•Failure to follow these warnings may result in
injuries that are serious or fatal to you, your
passengers, and others around you.
POWER STEERING
The standard power steering system will give you good
vehicle response and increased ease of maneuverability
in tight spaces. The system will provide mechanical
steering capability if power assist is lost.
If for some reason the power assist is interrupted, it will
still be possible to steer your vehicle. Under these condi-
tions, you will observe a substantial increase in steering
effort, especially at very low vehicle speeds and during
parking maneuvers.
NOTE:
•Increased noise levels at the end of the steering wheel
travel are considered normal and do not indicate that
there is a problem with the power steering system.
•Upon initial start-up in cold weather, the power steer-
ing pump may make noise for a short amount of time.
This is due to the cold, thick fluid in the steering
system. This noise should be considered normal, and it
does not in any way damage the steering system.
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WARNING!
Continued operation with reduced power steering
assist could pose a safety risk to yourself and others.
Service should be obtained as soon as possible.
CAUTION!
Prolonged operation of the steering system at the end
of the steering wheel travel will increase the steering
fluid temperature and it should be avoided when
possible. Damage to the power steering pump may
occur.
Power Steering Fluid Check
Checking the power steering fluid level at a defined
service interval is not required. The fluid should only be
checked if a leak is suspected, abnormal noises areapparent, and/or the system is not functioning as antici-
pated. Coordinate inspection efforts through an autho-
rized dealer.
CAUTION!
Do not use chemical flushes in your power steering
system as the chemicals can damage your power
steering components. Such damage is not covered by
the New Vehicle Limited Warranty.
WARNING!
Fluid level should be checked on a level surface and
with the engine off to prevent injury from moving
parts and to ensure accurate fluid level reading. Do
not overfill. Use only manufacturer’s recommended
power steering fluid.
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