differential JEEP WRANGLER 2008 JK / 3.G Owners Manual

WARNING!
ABS (Anti-Lock Brake System) cannot prevent the
natural laws of physics from acting on the vehicle,
nor can it increase the traction afforded by prevailing
road conditions. ABS cannot prevent accidents, in-
cluding those resulting from excessive speed in
turns, driving on very slippery surfaces, or hydro-
planing. Only a safe, attentive, and skillful driver can
prevent accidents. The capabilities of an ABS-
equipped vehicle must never be exploited in a reck-
less or dangerous manner which could jeopardize the
user’s safety or the safety of others.
TCS (Traction Control System)
This system monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) to provide
enhanced acceleration and stability. A feature of the TCS
system functions similar to a limited slip differential and
controls the wheel spin across a driven axle. If one wheel
on a driven axle is spinning faster than the other, the
system will apply the brake of the spinning wheel. This
will allow more engine torque to be applied to the wheel
that is not spinning. This feature remains active even if
TCS and ESP are in either the “Partial Off” or “Full Off”
modes. Refer to “ESP (Electronic Stability Program)” in
this section.
106 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

4H to 4L or 4L to 4H
With the vehicle rolling at 2 to 3 mph (3 to 5 km/h), shift
an automatic transmission into NEUTRAL (N), or de-
press the clutch pedal on a manual transmission. While
the vehicle is coasting at 2 to 3 mph (3 to 5 km/h), shift
the transfer case lever firmly to the desired position. Do
not pause with the transfer case in N (Neutral).
NOTE:Shifting into or out of 4L is possible with the
vehicle completely stopped, however, difficulty may oc-
cur due to the mating teeth not being properly aligned.
Several attempts may be required for clutch teeth align-
ment and shift completion to occur. The preferred
method is with the vehicle rolling at 2 to 3 mph (3 to 5
km/h). Avoid attempting to engage or disengage 4L with
the vehicle moving faster than 2 to 3 mph (3 to 5 km/h).WARNING!
Failure to engage a position completely can cause
transfer case damage or loss of power and vehicle
control. You could have an injury accident. Do not
drive the vehicle unless the transfer case is fully
engaged.
TRAC-LOK™ REAR AXLE — IF EQUIPPED
The Trac-Lok™ rear axle provides a constant driving
force to both rear wheels and reduces wheel spin caused
by the loss of traction at one driving wheel. If traction
differs between the two rear wheels, the differential
automatically proportions the usable torque by providing
more torque to the wheel that has traction.
STARTING AND OPERATING 289
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WARNING!
If the engine stalls or you lose headway or cannot
make it to the top of a steep hill or grade, never
attempt to turn around. To do so may result in
tipping and rolling the vehicle, which may result in
severe injury. Always back carefully straight down a
hill in REVERSE gear. Never back down a hill in
NEUTRAL using only the vehicle brakes. Never
drive diagonally across a hill, always drive straight
up or down.
Driving Through Water
Extreme care should be taken crossing any type of water.
Water crossings should be avoided if possible, and only
be attempted when necessary in a safe responsible man-
ner. You should only drive through areas which are
designated and approved. You should tread lightly andavoid damage to the environment. You should know
your vehicles abilities and be able to recover it if some-
thing goes wrong. You should never stop or shut a
vehicle off when crossing deep water unless you ingested
water into the engine air intake. If the engine stalls, do
not attempt to restart it. Determine if it has ingested
water first. The key to any crossing is low and slow. Shift
into 1st gear (manual transmission), or DRIVE (automatic
transmission), with the transfer case in the 4L (Low)
position and proceed very slowly with a constant slow
speed {3 to 5 mph (5 to 8 km/h) maximum} and light
throttle. Keep the vehicle moving; do not try to accelerate
through the crossing. After crossing any water higher
than the bottom of the axle differentials, you should
inspect all of the vehicle fluids for signs of water inges-
tion.
304 STARTING AND OPERATING

Chassis
ComponentFluid, Lubricant, or Genuine Part
Automatic Transmission MOPARATF+4 Automatic Transmission Fluid
Manual Transmission MOPARManual Transmission Lubricant or equivalent (meeting the require-
ments of DaimlerChrysler Material Standard MS-9224)
Transfer Case MOPARATF+4 Automatic Transmission Fluid or equivalent.
Axle Differential (Front) MOPARGear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 198 RBI (Model 35) and 226 RBI (Model 44) - MOPARGear & Axle Lubri-
cant (SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use MOPAR
Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models
equipped with Trac-Lok™ require an additive.
Brake Master Cylinder MOPARDOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3, SAE
J1703 brake fluid is not available, then DOT 4 is acceptable. Use only recom-
mended brake fluids.
Power Steering Reservoir MOPARATF+4 Automatic Transmission Fluid
426 MAINTAINING YOUR VEHICLE

Engine Oil........................... 385
Finish Care ............................ 407
Flashers Hazard Warning ....................... 364
Turn Signal ..................... 207,421,422
Flooded Engine Starting ................... 273
Fluid Capacities ......................... 424
Fluid Level Checks ...................... 405
Automatic Transmission ................. 401
Engine Oil ........................... 383
Manual Transmission ................... 404
Power Steering ........................ 391
Fluids, Lubricants and Genuine Parts .......... 425
Fog Light Service ........................ 422
Fog Lights ........................... 99,422
Fold and Tumble Rear Seat .................. 89
Folding Rear Seat ........................ 92
Folding Windshield ...................... 191
Four Wheel Drive ....................... 285 Shifting
............................. 287
Four Wheel Drive Operation ................ 285
Four-Way Hazard Flasher .................. 364
Front Axle (Differential) ................... 405
Fuel ................................. 336
Filler Cap (Gas Cap) .................... 340
Filter ............................... 388
Gasoline ............................ 336
Gauge .............................. 206
Materials Added ....................... 338
Octane Rating ........................ 336
Requirements ......................... 424
Tank Capacity ........................ 424
Fuel System Caution ................... 338,341
Fuses ................................ 413
Gas Cap (Fuel Filler Cap) ...............340,380
Gasoline (Fuel) ......................... 336
Gasoline, Reformulated ................... 336
INDEX 451
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Pregnant Women and Seat Belts.............. 50
Preparation for Jacking .................... 367
Pretensioners Seat Belts ............................. 48
Programming Transmitters
(Remote Keyless Entry) .................... 22
Radial Ply Tires ......................... 325
Radio Broadcast Signals ................... 220
Radio, Navigation ....................... 250
Radio Operation ...................... 251,258
Radio, Satellite .................... 250,251,253
Radio (Sound Systems) .................... 250
Rear Axle (Differential) .................... 405
Rear Swing Gate ......................... 38
Rear Window Defroster ................... 198
Rear Window Features .................... 197
Rear Wiper/Washer ...................... 197
Rearview Mirrors ........................ 83 Recorder, Event Data
...................... 60
Recreational Towing ...................... 359
Shifting into Transfer Case Neutral (N) ....... 360
Shifting out of Transfer Case Neutral (N) ..... 361
Reformulated Gasoline .................... 336
Refrigerant ............................ 391
Release, Hood ........................... 94
Reminder, Lights On ...................... 98
Reminder, Seat Belt ....................... 49
Remote Control Door Locks ........................... 19
Remote Keyless Entry (RKE) ................. 19
Remote Starting System .................... 25
Replacement Bulbs ....................... 420
Replacement Keys ........................ 16
Replacement Parts ....................... 382
Replacement Tires ....................... 327
Reporting Safety Defects ................... 440
Restraint, Head .......................... 89
INDEX 457
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