2004 DODGE RAM 2500 DIESEL rear differential

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 237
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wheel. The nuts should then be tightened to recom-
mended torque. Tighten the nuts to final torque in
increments. Progress around the bolt circle, tightening
the nut opposite to the nut just previously tightened until
final torque is achieved. Recommended torques are
shown in the following chart.
Disc
WheelsType Nut Stud Size Torque
Ft. Lbs.Torque
Newton
Meters
Cone 9/16-18 120-150 160-200
Flanged 9/16-18 130-160 190-220
To Stow The Flat Or Spare
Turn the wheel so that the valve stem is down. Slide the
wheel retainer through the center of the wheel and
position it properly across the wheel opening.
For convenience in checking the spare tire inflation, stow
with the valve stem toward the rear of the vehicle.Attach the wheel wrench to the extension tube. Rotate the
winch mechanism until the wheel is drawn into place
against the underside of the vehicle. Continue to rotate
until you feel the winch mechanism slip or click 3 or 4
times. It cannot be overtightened. Push against the tire
several times to be sure it is firmly in place.
HOISTING
A conventional floor jack may be used at the jacking
locations, refer to the graphics that show jacking loca-
tions. However, a floor jack or frame hoist must never be
used on any other parts or the underbody.
CAUTION!
Never use a floor jack directly under the differential
housing of a loaded truck or damage to your vehicle
may result.
WHAT TO DO IN EMERGENCIES 309
6

Clutch Hydraulic System
The clutch hydraulic system is a sealed maintenance-free
system. In the event of leakage or other malfunction, the
system must be replaced.
Propeller Shaft Universal Joints
Cross Type (No fittings) ÐRelubrication of this type of
universal joint is not required. The seals should be
inspected for external leaks or damage. If external leaks
or damage is evident, the universal joint should be
replaced.
Rear Axle And 4x4 Front Driving Axle Fluid Level
For Model 9.25 Front Axles and 10.5º/11.5º Rear Axles
refer to Recommended Fluids, Lubricants and Genuine
Parts for the correct lubricant type. For normal service,
periodic fluid level checks are not required. When the
vehicle is serviced for other reasons, the exterior surfaces
of the axle assembly should be inspected.When checking the fluid level, the vehicle should be in a
level position. The fluid level should be 1/4º   1/4º (6.4
mm   6.4 mm) below the fill hole on the 9.25º Front Axle.
The fluid level should be 3/4º   1/4º (19 mm   6.4 mm)
below the fill hole on all 10.5º and 1/4º   1/4º (6.4 mm
  6.4 mm) on 11.5º Rear Axles.
Drain And Refill
Vehicles operated in normal service do not have regularly
scheduled oil changes. If fluid has become contaminated
with water or subjected to severe service, follow the
recommended change intervals in Maintenance Schedule
ªBº in Section 8 of this manual.
Lubricant Selection
Refer to Recommended Fluids, Lubricants and Genuine
Parts for the correct lubricant type.
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
MAINTAINING YOUR VEHICLE 351
7

Child Seat............................56,62
Cigar Lighter........................... 127
Climate Control......................... 185
Clock................................ 151
Clutch Linkage Maintenance................ 350
Compact Disc Maintenance................. 184
Compact Disc Player..................158,164
Compact Spare Tire...................... 255
Compass.............................. 117
Compass Calibration..................... 117
Compass Variance....................... 118
Computer, Trip/Travel.................... 113
Console, Overhead....................... 112
Contract, Service........................ 404
Cooling System......................... 343
Coolant Capacity...................... 379
Coolant Level......................... 344
Disposal of Used Coolant................ 346
Drain, Flush, and Refill.................. 344Inspection........................... 343
Radiator Cap......................343,346
Selection of Coolant..................345,380
Temperature Gauge..................... 146
Cruise Control.......................... 109
Cup Holder............................ 128
Customer Assistance..................... 402
Daytime Running Lights................... 102
Dealer Service.......................... 322
Defroster, Rear Window..............78,191,195
Defroster, Windshield..................186,189
Delay Wipers........................... 105
Differential, Limited-Slip.................. 237
Dipsticks.............................. 325
Power Steering........................ 339
Disc Brakes............................ 348
Disposal.............................. 331
Engine Oil........................... 331
414 INDEX

Low Washer Fluid..................... 149
Passing............................. 104
Seat Belt Reminder..................... 145
Service.............................. 367
Side Marker.......................... 378
Transfer Case......................... 230
Transmission Warning................150,281
Turn Signal..................103,144,367,371
Warning (Instrument Cluster Description)..... 143
Limited-Slip Differential................237,352
Loading Vehicle......................... 269
Tires ............................... 247
Locks................................. 16
Child Protection........................ 21
Door................................ 16
Ignition.............................. 14
Keys................................ 11
Power Door........................... 17
Steering Wheel......................... 14Lower Anchors and Tether for CHildren (LATCH) . 59
Lubricants............................. 356
Lubrication, Body....................... 340
Lug Nuts............................. 305
Lumbar Support......................... 94
Maintenance........................... 322
Maintenance Procedures................... 325
Maintenance Schedule.................... 384
Schedule9A9......................... 396
Manual, Service......................... 408
Manual Transmission...............222,224,352
Fluid Level Check...................... 352
Lubricant Selection..................352,381
Mirrors................................ 75
Automatic Dimming..................... 76
Electric Powered....................... 77
Outside.............................. 76
Rearview............................. 75
INDEX 419
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