2008 DODGE RAM 2500 POWER WAGON wheel

rear axles are unlocked. In the REAR LOCK position, the
rear axle is locked. In the FRONT/REAR position, the
front and rear axles are locked.
NOTE:Even when the axles are in the AXLE UNLOCK
position, the limited slip differential in the rear axle still
provides torque biasing capability for moderate low
traction environments.
During the command to lock the axle, the indicator light
will flash until the axle is locked. After the lock command
has been successfully executed, the light will remain on
solid.
To lock the rear axle, place the vehicle in 4LO by
following the procedure in Four Wheel Drive Operation,
located in this section of the manual. Move the axle
locker switch position to REAR LOCK while traveling
less than 3 MPH (5 KM/H). The RR indicator light will
remain on when the rear axle is locked.NOTE:Left to right wheel speed difference may be
necessary to allow the axle to fully lock. If the indicator
light is flashing after placing the switch in the REAR
LOCK or FRONT/REAR position, drive the vehicle in a
turn or on loose gravel to expedite the locking action.
WARNING!
Do not use the locked axle position for normal
driving. A locked front axle is intended for off-road
driving only. Locking the front axle during on-road
driving will reduce the steering ability. This could
cause an accident and you may be seriously injured.
To lock the front axle move the axle locker switch to
FRONT/REAR while travelingless than 3 MPH (5
KM/H). The indicator light will be solid when the front
axle is locked.
278 STARTING AND OPERATING

NOTE:The rear axle must be locked before the front
axle will lock.
To unlock the front axle move the axle locker switch to
REAR LOCK. The FRONT/REAR indicator light will go
out when the axle is unlocked.
NOTE:The axle lockers could be torque locked due to
side to side loads on the axle. Driving slowly while
turning the steering wheel from a left hand turn to a right
hand turn or driving in reverse for a short distance may
be required to release the torque lock and unlock the
axles.
To unlock the rear axle move the axle locker switch to
AXLE UNLOCK. The REAR LOCK indicator light will go
out when the rear axle is unlocked.Stabilizer/Sway Bar System
Power Wagon vehicles are equipped with an electronic
disconnecting stabilizer/sway bar. This system allows
greater front suspension travel in off-road situations.
This system is controlled by the electronic control sway
bar switch located on the instrument panel.
Electronic Control Sway Bar Switch
STARTING AND OPERATING 279
5

The switch has two positions, on-road and off-road. The
system is normally in on-road mode, indicated by a solid
green light. The stabilizer/sway bar should remain in
on-road mode during normal driving conditions.
WARNING!
Do not disconnect the stabilizer bar and drive on
hard surfaced roads or at speeds above 18 MPH, you
may lose control of the vehicle, which could result in
serious injury. The front stabilizer bar enhances
vehicle stability and is necessary for maintaining
control of the vehicle. The system monitors vehicle
speed and will attempt to reconnect the stabilizer bar
at speeds over 18 MPH. This is indicated by a
flashing off road light and solid on road light. Once
vehicle speed is reduced below 14 MPH the system
will once again attempt to return to off road mode.To disconnect the stabilizer/sway bar, shift to either 4HI
or 4LO as shown in Four Wheel Drive Operation and
press the top of the stabilizer/sway bar button to obtain
the off-road position. The amber indicator light will flash
until the stabilizer/sway bar has been fully disconnected.
NOTE:The stabilizer/sway bar may be torque locked
due to left and right suspension height differences. This
condition is due to driving surface differences or vehicle
loading. In order for the stabilizer/sway bar to
disconnect/reconnect, the right and left halves of the bar
must be aligned. This alignment may require that the
vehicle be driven onto level ground or rocked from side
to side.
To return to on-road mode press the bottom of the
stabilizer/sway bar button.
280 STARTING AND OPERATING

Ramp Travel Index (RTI)
The ramp travel index is the distance, in inches, that you
can drive your vehicle with one wheel on a 20-degree
ramp without lifting any other wheel off the ground. This
distance up the ramp divided by the wheelbase of the
vehicle and multiplied by 1000 is the RTI. The Power
Wagon has an RTI of 655, which means you can articulate
one front wheel 32 inches in the air while the other three
wheels remain in contact with the ground.
High Mobility Characteristics
The Power Wagon has high off-road mobility character-
istics with an approach angle A= 35 degrees, a break-over
angle B= 25.5 degrees, a running ground clearance C=
14.5 inches, a departure angle D= 26.5 degrees, an axle to
ground clearance E= 8.4 inches front/E= 8.25 rear and
has a ramp travel index (with the smart bar in off-road
mode) of 655. Also the Power Wagon has a grade-ability
of a 60% (31 degree) slope.
282 STARTING AND OPERATING

water 30 inches deep at a maximum speed of 5 mph, both
with an entrance ramp angle of 1.3 degrees.
CAUTION!
The door sill height is 25 inches. Water may intrude
into the interior of the vehicle at greater depths.
Simultaneous Brake And Throttle Operation
Many off-road driving conditions require the simulta-
neous use of the brake and throttle (two footed driving).
When climbing rocks, logs, or other stepped objects,
using light brake pressure with light throttle will keep the
vehicle from jerking or lurching. This technique is also
used when you need to stop and restart a vehicle on a
steep incline.
The Basics Of Off-Road Driving
You will encounter many types of terrain driving off-
road. You should be familiar with the terrain and area
before proceeding. There are many types of surface
conditions: hard packed dirt, gravel, rocks, grass, sand,
mud, snow and ice. Every surface has a different effect on
your vehicle's steering, handling and traction. Control-
ling your vehicle is one of the keys to successful off-road
driving, so always keep a firm grip on the steering wheel
and maintain a good driving posture. Avoid sudden
accelerations, turns or braking. In most cases there are no
road signs, posted speed limits or signal lights. Therefore
you will need to use your own good judgment on what is
safe and what isn't. When on a trail you should always be
looking ahead for surface obstacles and changes in
terrain. The key is to plan your future driving route while
remembering what you are currently driving over.
STARTING AND OPERATING 285
5

the wheels and traction will be lost. If you start to slow
to a stop, try turning your steering wheel no more than
a
1¤4turn quickly back and forth, while still applying
throttle. This will allow the tires to get a fresh9bite9
and help maintain your momentum.
CAUTION!
On icy or slippery roads, do not downshift at high
engine rpm's or vehicle speeds because engine brak-
ing may cause skidding and loss of control.
²Mud± Deep mud creates a great deal of suction
around the tires and is very difficult to get through.
You should use 4L (low range) with a gear low enough
to maintain your momentum without shifting. If you
start to slow to a stop, try turning your steering wheel
no more than a
1¤4turn quickly back and forth for
additional traction. Mud holes pose an increasedthreat of vehicle damage and getting stuck. They are
normally full of debris from previous vehicles getting
stuck. As a good practice before entering any mud
hole, get out and determine how deep it is, if there are
any hidden obstacles and if the vehicle can be safely
recovered if stuck.
²Sand± Soft sand is very difficult to travel through
with full tire pressure. When crossing soft sandy spots
in a trail maintain your vehicle's momentum and do
not stop. The key to driving in soft sand is to use the
appropriate tire pressure, accelerating slowly, avoid-
ing abrupt maneuvers and maintaining the vehicle's
momentum. If you are going to be driving on large soft
sandy areas or dunes, reduce your tire pressure to a
minimum of 15 psi (103 kPa) to allow for a greater tire
surface area. Reduced tire pressure will drastically
improve your traction and handling, while driving on
the soft sand, but you must return the tires to normal
STARTING AND OPERATING 287
5

air pressure before driving on pavement or other hard
surfaces. Be sure you have a way to air the tires back
up prior to reducing the pressure.
CAUTION!
Reduced tire pressures may cause tire unseating and
total loss of air pressure. To reduce the risk of tire
unseating, while at a reduced tire pressure, reduce
your speed and avoid sharp turns or abrupt
maneuvers.
Crossing Obstacles (Rocks And Other High
Points)
While driving off road, you will encounter many types of
terrain. These varying types of terrain bring different
types of obstacles. Before proceeding review the path
ahead to determine the correct approach and your ability
to safely recover the vehicle if something goes wrong.Keeping a firm grip on the steering wheel, bring the
vehicle to a complete stop and then inch the vehicle
forward until it makes contact with the object. Apply the
throttle lightly while holding a light brake pressure and
ease the vehicle up and over the object.
WARNING!
Crossing obstacles can cause abrupt steering system
loading which could cause you to loose control of
your vehicle.
Using A Spotter
There are many times where it is hard to see the obstacle
or determine the correct path. Determining the correct
path can be extremely difficult when you are confronting
many obstacles. In these cases have someone guide you
over, through, or around the obstacle. Have the person
288 STARTING AND OPERATING

CAUTION!
Winching or rocking the vehicle off hard objects
increases the risk of underbody damage.
Hill Climbing
Hill climbing requires good judgment and a good under-
standing of your abilities and your vehicle's limitations.
Hills can cause serious problems. Some are just too steep
to climb and should not be attempted. You should always
feel confident with the vehicle and your abilities. You
should always climb hills straight up and down. Never
attempt to climb a hill on an angle.
²Before Climbing A Steep Hill± As you approach a
hill consider its grade or steepness. Determine if it is
too steep. Look to see what the traction is on the hill
side trail. Is the trail straight up and down? What is on
top and the other side? Are there ruts, rocks, branchesor other obstacles on the path? Can you safely recover
the vehicle if something goes wrong? If everything
looks good and you feel confident, then change trans-
mission into a lower gear, shift the transfer case into 4L
(Low) and proceed with caution. You should use first
gear and 4L (Low) for very steep hills.
²Driving Up Hill± Once you have determined your
ability to proceed and have shifted into the appropri-
ate gear, line your vehicle up for the straightest
possible run. Accelerate with an easy constant throttle
and apply more power as you start up the hill. Do not
race forward into a steep grade, the abrupt change of
grade could cause you to lose control. If the front end
begins to bounce, ease off the throttle slightly to bring
all four tires back on the ground. As you approach the
crest of the hill ease off the throttle and slowly proceed
over the top. If the wheels start to slip as you approach
the crest of a hill, ease off the accelerator and maintain
headway by turning the steering wheel no more than
STARTING AND OPERATING 291
5