2008 DODGE RAM 2500 POWER WAGON differential

UNDERSTANDING THE FEATURES OF YOUR VEHICLE
CONTENTS
mPower Wagon Features....................84
NLocking Front And Rear Differentials........84
N4.56:1 Gears..........................84
NElectronically Disconnecting Stabilizer/Sway
Bar ................................85
NIncreased Ride Height...................85
N12,000 Lb. Winch.......................85
NHigh-Pressure Monotube Shocks/New Front
And Rear Springs......................86
NOff-Road Tires........................86NSkid Plates And Underbody Protection.......86
NWheel Flares..........................86
NWheels..............................87
NStandard Package Features................87
NMopar Options........................88
mMirrors...............................88
NInside Mirror.........................88
NAutomatic Dimming Mirror ± If Equipped....89
NOutside Mirrors.......................90
3

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
3

²Off-Road Tuned Suspension And Shocks - improves
mobility, ground clearance and ride comfort.
²Heavy Duty Thermally Protected and Sealed Electric
Winch with Roller Fairlead - Useful for work and
vehicle recovery.
²17 Inch Forged Aluminum Wheels With 33 Inch Tires
- improves traction and differential ground clearance.
Mopar Options:
²
Rock Rails - protects the door sills from impingement
damage and provides a vehicle jacking point.
²Winch accessory kit - Contents include:
²Snatch Block/Pulley
²Clevis
²Tree strap
²Tow Strap
²Gloves
²ªPower Wagon embossedº storage bag
²Bed Liner - protects the bed from impingement dam-
age
NOTE:These Mopar options have been specially de-
signed and tested for the Power Wagon to meet the
vigorous off-road conditions.
MIRRORS
Inside Mirror
The mirror should be adjusted to center on the view
through the rear window.
Annoying headlight glare can be reduced by moving the
small control under the mirror to the night position
(toward rear of vehicle). The mirror should be adjusted
while set in the day position (toward windshield).
88 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

mLimited-Slip Differential Ð If Equipped.......275
mDriving On Slippery Surfaces..............276
mAxle Locker System.....................276
mStabilizer/Sway Bar System...............279
mPower Wagon ± Safe Off-Road Driving.......281
NOff-Road Driving Tips And Vehicle
Characteristics.......................281
NDriving In Snow, Mud And Sand..........286
NCrossing Obstacles (Rocks And Other High
Points).............................288
NHill Climbing........................291
NDriving Through Water.................294
NAiring Down For Off-Road Driving........296
NVehicle Recovery......................297NAfter Driving Off-Road.................301
mWinch Usage ± If Equipped...............302
NThings To Know Before Using Your Winch . . . 302
NUnderstanding The Features Of Your Winch . . 304
NWinch Accessories.....................306
NOperating Your Winch..................307
NRigging Techniques....................318
mParking Brake.........................321
mBrake System..........................322
NBrake Noise.........................323
NFour-Wheel Anti-Lock Brake System (ABS) ±
If Equipped.........................323
mPower Steering........................325
254 STARTING AND OPERATING

LIMITED-SLIP DIFFERENTIAL Ð IF EQUIPPED
The limited-slip differential provides additional traction
on snow, ice, mud, sand and gravel, particularly when
there is a difference between the traction characteristics
of the surface under the right and left rear wheels. During
normal driving and cornering, the limited-slip unit per-
forms similarly to a conventional differential. On slip-
pery surfaces, however, the differential delivers more of
the driving effort to the rear wheel having the better
traction.
The limited-slip differential is especially helpful during
slippery driving conditions. With both rear wheels on a
slippery surface, a slight application of the accelerator
will supply maximum traction. When starting with only
one rear wheel on an excessively slippery surface, slight
momentary application of the parking brake may be
necessary to gain maximum traction.WARNING!
On vehicles equipped with a limited-slip differen-
tial, never run the engine with one rear wheel off the
ground, since the vehicle may drive through the rear
wheel remaining on the ground. You could 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.
STARTING AND OPERATING 275
5

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

Water Fording Characteristics
Water fording characteristic is the vehicle's ability to
cross a body of still water, where the powertrain and
drivetrain are safe from water ingestion. The Power
Wagon has high water fording characteristics with the
ability to cross a pool of water, without stopping, 24
inches deep at a maximum speed of 10 mph and a pool of
Front and Rear (Shown) Differential Height E
Water Fording
284 STARTING AND OPERATING