2008 DODGE RAM 2500 POWER WAGON engine

POWER WAGON FEATURES
Locking Front and Rear Differentials
Most 4WD trucks are equipped with open differentials
front and rear. This design is used because it allows each
wheel to turn independently helping to eliminate bind-
ing when cornering. A disadvantage of using an open
differential is when one or more wheels lose traction; all
of the power is directed to those wheels resulting in a loss
of momentum. The Power Wagon is equipped with
electronically locking front and rear differentials. These
differentials, when engaged, mechanically lock together
the axle shafts forcing the wheels to spin at an equal rate.
This allows the vehicle to maintain its momentum and
thus prevents it from becoming stuck. The locking front
and rear differentials should only be engaged during
low-speed, extreme off-road situations where one wheel
is likely to not be in contact with the ground. It is notrecommended to drive the vehicle with the differentials
locked on pavement due to the reduced ability to turn
and speed limitations.
4.56:1 Gears
This is the highest axle ratio available in a full-size
pickup. The high gearing helps to compensate for the
increased rolling mass and increase diameter of the
off-road tires. As well, there are many advantages to a
higher axle ratio in off-road applications. When driving
downhill the high gearing enables the driver to use the
engine to slow the vehicle down in a more controlled
manner. When driving up a steep grade, the ratio helps
by keeping the truck in its power band helping to
maintain upward momentum.
84 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Wheels
Stylish forged aluminum 179wheels give the Power
Wagon a powerful stance. Forging a wheel from alumi-
num produces a stronger, lighter weight wheel than
machining or casting the wheel out of the same material.
Standard package features:
²
Fuel Tank Skid Plate - protects the fuel tank from
impingement damage.
²Transfer Case Skid Plate and Tubing - protects the
transfer case and exhaust catalyst from impingement
damage.
²Heavy Duty Cross Members - protects the under
carriage and supports the under body protection skid
plates.
²Fore/Aft rails - which connect the cross member for
additional support and prevent the truck from getting
hung up on large rocks between the cross members.
²Steering Dampener Skid Plate - protects the steering
dampener from impingement damage.
²Electronically Locking Front And Rear Axle Differen-
tials with 4:56 Gears - improves mobility and articula-
tion by locking the differentials.
²Electronically Disconnecting Stabilizer Bar - improves
mobility and articulation by disconnecting the Stabi-
lizer Bar.
²160 Amp Alternator - supplies increased electrical
power for the winch and other off-road accessories.
²Heavy Duty Battery - supplies increased electrical
power for the winch and other off-road accessories.
²Heavy Duty Cooling Fan - provides enhanced engine
and transmission cooling under vigorous off-road
conditions.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 87
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²Press the ªVoice Recognitionº button and say9Setup,
Voice Training9command.
Repeat the words and phrases when prompted by the
UConnecttsystem. For best results, the Voice Training
session should be completed when the vehicle is parked,
engine running, all windows closed, and the blower fan
switched off.
This procedure may be repeated with a new user. The
system will adapt to the last trained voice only.
To restore the Voice Recognition system to factory default
settings, enter the Voice Training session via the above
procedure and follow the prompts.
Voice Recognition (VR)
²
For best performance, adjust the rear view mirror to
provide at least1¤2inch (1 cm) gap between the
overhead console (if equipped) and the mirror.
²Always wait for the beep before speaking.
²Speak normally, without pausing, just as you would
speak to a person sitting approximately eight (8) feet
away from you.
²Make sure that no one other than you is speaking
during a voice recognition period.
²Performance is maximized under:
²low-to-medium blower setting,
²low-to-medium vehicle speed,
²low road noise,
²smooth road surface,
²fully closed windows,
²dry weather condition.
112 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Your vehicle is equipped with plastic headlight lenses
that are lighter and less susceptible to stone breakage
than glass headlights.
Plastic is not as scratch resistant as glass and therefore
different lens cleaning procedures must be followed.To minimize the possibility of scratching the lenses and
reducing light output, avoid wiping with a dry cloth. To
remove road dirt, wash with a mild soap solution fol-
lowed by rinsing.
Do not use abrasive cleaning components, solvents, steel
wool or other abrasive materials to clean the lenses.
Daytime Running Lights (Canada Only and Fleet
Vehicles)
The headlights on your vehicle will illuminate when the
engine is started and the transmission is in any gear
except park. This provides a constant9Lights ON9con-
dition until the ignition is turned OFF. The lights illumi-
nate at less than 50% of normal intensity. If the parking
brake is applied the Daytime Running Lights will turn
off. Also, if a turn signal is activated, the DRL lamp on the
same side of the vehicle will turn off for the duration of
the turn signal activation. Once the turn signal is no
longer active, the DRL lamp will illuminate.
Light Switch Rotation
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 131
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ELECTRONIC SPEED CONTROL Ð IF EQUIPPED
When engaged, this device takes over accelerator opera-
tion at speeds greater than (refer to the table below for
the speed for your specific engine). The controls are
mounted on the steering wheel.NOTE:The Electronic Speed Control System has been
designed to shut down if multiple speed control switch
buttons (i.e. SET and CANCEL) are operated simulta-
neously in order to ensure proper operation. The system
can be reactivated by pushing the speed control switch
ON/OFF button and re-establishing the desired vehicle
SET speed.
To Activate
Push the ON/OFF button to the ON position. In the
instrument cluster, the word ªCRUISEº illuminates when
the system is on.
To Set At A Desired Speed
When the vehicle has reached the desired speed, press
and release the SET button. Release the accelerator and
the vehicle will operate at the selected speed.
138 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

To Deactivate
A soft tap on the brake pedal, normal braking, clutch
pressure while slowing the vehicle, or pressing the CAN-
CEL button will deactivate speed control without erasing
the memory. Pushing the ON/OFF button to the OFF
position or turning off the ignition erases the memory.
WARNING!
Leaving the Speed Control ON when not in use is
dangerous. You could accidentally set the system to
cause it to go faster than you want. You could lose
control and have an accident. Always leave the sys-
tem OFF when you aren't using it.
To Resume Speed
To resume a previously set speed, push and release the
RESUME button. Resume can be used at any speed above
(refer to the table below for the speed for your specific
engine).
To Vary The Speed Setting
When the speed control is on, speed can be increased by
pressing and holding the ACCEL button. When the
button is released, a new set speed will be established.
Tapping the ACCEL button once will result in a speed
increase (refer to the table below for the speed for your
specific engine). Each time the button is tapped, speed
increases so that tapping the button three times will
increase speed by three increments.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 139
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Tapping the DECEL button once will result in a speed
decrease (refer to the table below for the speed for your
specific engine). Each time the button is tapped, speed
will decrease. For example, tapping the button 3 times
will decrease the speed by 3 times the speed listed in the
table below (refer to the table below for the speed for
your specific engine).To decrease speed while the speed control is on, press
and hold the DECEL button. Release the button when the
desired speed is reached, and the new speed will be set.
Functions 5.7L Engine
Engage Speed 25 mph (40 km/h)
Minimun RESUME Speed 20 mph (32 km/h)
ACCEL Increase 1 mph (2 km/h)
DECEL Decrease 1 mph (2 km/h)
Dropout Speed 20 mph (32 km/h)
140 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

To Accelerate For Passing
Depress the accelerator as you would normally. When the
pedal is released, the vehicle will return to the set speed.
NOTE:When driving uphill, at elevations above 2,000
feet (610 meters), or when the vehicle is heavily loaded
(especially when towing) the vehicle may slow below the
SET speed. If the vehicle speed drops below (refer to the
table below for the speed for your specific engine), the
speed control will automatically disengage. If this hap-
pens, you can push down on the accelerator pedal to
maintain the desired speed.
Vehicles equipped with a 5±speed-manual transmission
should be operated in 4th gear or lower under the above
conditions.Vehicles equipped with a Automatic transmission may
exhibit several downshifts under the above conditions.
To reduce the frequency of the downshifts and to im-
prove vehicle performance, it is advisable to lock out
overdrive by pressing the ªTOW/HAULº button located
at the end of the gear shifter.
WARNING!
Speed Control can be dangerous where the system
can't maintain a constant speed. Your vehicle could
go too fast for the conditions, and you could lose
control. An accident could be the result. Don't use
Speed Control in heavy traffic or on roads that are
winding, icy, snow-covered, or slippery.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 141
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