2013 JEEP WRANGLER UNLIMITED differential

WARNING!
Failure to engage a position completely can cause
transfer case damage or loss of power and vehicle
control. You could have a collision. Do not drive the
vehicle unless the transfer case is fully engaged.
TRAC-LOKREAR 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 automati-
cally proportions the usable torque by providing more
torque to the wheel that has traction. Trac-Lok
is especially helpful during slippery driving
conditions. With both rear wheels on a slippery surface, a
slight application of the accelerator will supply maxi-
mum traction.
WARNING!
On vehicles equipped with a limited-slip differen-
tial, never run the engine with one rear wheel off the
ground. The vehicle may drive through the rear
wheel remaining on the ground and cause you to lose
control of your vehicle.
432 STARTING AND OPERATING
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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
ingestion.
CAUTION!• Water ingestion into the axles, transmission, trans-
fer case, engine or vehicle interior can occur if you
drive too fast or through too deep of water. Water
can cause permanent damage to engine, driveline
or other vehicle components, and your brakes will
be less effective once wet and/or muddy.
• This vehicle is capable of crossing through water at
a depth of 30 inches (76 cm) at speeds no greater
than 5 mph (8 km/h). Water ingestion can occur
causing damage to your vehicle. Before You Cross Any Type Of Water
As you approach any type of water, you need to deter-
mine if you can cross it safely and responsibly. If neces-
sary, get out and walk through the water or probe it with
a stick. You need to be sure of its depth, approach angle,
current and bottom condition. Be careful of murky or
muddy waters; check for hidden obstacles. Make sure
you will not be intruding on any wildlife, and you can
recover the vehicle if necessary. The key to a safe crossing
is the water depth, current and bottom conditions. On
soft bottoms, the vehicle will sink in, effectively increas-
ing the water level on the vehicle. Be sure to consider this
when determining the depth and the ability to safely
cross.
5 STARTING AND OPERATING 447

WARNING!The Anti-Lock Brake System (ABS) cannot prevent
the natural laws of physics from acting on the ve-
hicle, nor can they increase the traction afforded by
prevailing road conditions. The ABS cannot prevent
collisions, including those resulting from excessive
speed in turns, driving on very slippery surfaces, or
hydroplaning. The capabilities of an ABS-equipped
vehicle must never be exploited in a reckless or
dangerous manner which could jeopardize the user’s
safety or the safety of others.
Traction Control System (TCS)
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 ESC are in either the “Partial Off” or “Full Off”
modes. Refer to “Electronic Stability Control (ESC)” in
this section for further information.
Brake Assist System (BAS)
The BAS is designed to optimize the vehicle’s braking
capability during emergency braking maneuvers. The
system detects an emergency braking situation by sens-
ing the rate and amount of brake application and then
applies optimum pressure to the brakes. This can help
reduce braking distances. The BAS complements the
anti-lock brake system (ABS). Applying the brakes very
quickly results in the best BAS assistance. To receive the
5 STARTING AND OPERATING 457

Chassis
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission –
If Equipped MOPAR  ATF+4  Automatic Transmission Fluid or equivalent licensed
ATF+4  product.
Manual Transmission –
If Equipped MOPAR  Manual Transmission Lubricant or equivalent (meeting the require-
ments of Chrysler Material Standard MS-9224).
Transfer Case MOPAR  ATF+4  Automatic Transmission Fluid or equivalent licensed
ATF+4  product.
Axle Differential (Front) MOPAR  Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 226 RBI (Model 44) – MOPAR  Gear & Axle Lubricant (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 MOPAR  DOT 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 recommended
brake fluids.
Power Steering Reservoir MOPAR  Power Steering Fluid +4, MOPAR  ATF+4  Automatic Transmission
Fluid or equivalent licensed ATF+4  product.612 MAINTAINING YOUR VEHICLE

Filters
Air Cleaner .......................... .569
Air Conditioning ...................... .402
Engine Oil ........................... .569
Engine Oil Disposal .................... .568
Flashers
Hazard Warning ...................... .538
Turn Signal .......................... .103
Flash-To-Pass ........................... .170
Flooded Engine Starting .....................411
Fluid Capacities ......................... .610
Fluid Leaks ............................ .103
Fluid Level Checks ....................... .590
Engine Oil ........................... .566
Manual Transmission ................... .589
Power Steering ....................... .451
Fluids, Lubricants and Genuine Parts ...........611
Fog Lights ............................. .170
Fog Light Service ........................ .608 Fold and Tumble Rear Seat ................. .161
Folding Rear Seat ........................ .164
Folding Windshield ....................... .286
Four-Way Hazard Flasher .................. .538
Four Wheel Drive ........................ .428
Four Wheel Drive Operation ................ .428
Freeing A Stuck Vehicle .................... .552
Front Axle (Differential) .................... .590
Fuel .................................. .506
Adding ............................. .510
Additives ........................... .509
Clean Air ........................... .507
Ethanol ............................. .507
Filler Cap (Gas Cap) ................... .510
Gasoline ............................ .506
Gauge .............................. .300
Materials Added ...................... .509
Methanol ........................... .507
Octane Rating ........................ .506
10 INDEX 639

Oil Pressure Light ........................ .301
Onboard Diagnostic System ................. .562
Operating Precautions ..................... .562
Operator Manual (Owner’s Manual) .............6
Outside Rearview Mirrors ...................112
Overdrive .............................. .427
Overdrive OFF Switch ..................... .427
Overheating, Engine ...................... .305
Owner’s Manual (Operator Manual) .............6
Paint Care ............................. .591
Panic Alarm ..............................24
Parking Brake ........................... .452
Passing Light ........................... .170
Personal Settings ......................... .331
Pets ....................................98
Pets, Transporting ..........................98
Phone, Cellular ...........................114
Phone, Hands-Free (Uconnect™) ...............114 Placard, Tire and Loading Information ......... .478
Power
Door Locks ............................38
Inverter ............................. .186
Mirrors ..............................113
Steering ............................ .450
Windows .............................41
Pregnant Women and Seat Belts ................61
Preparation for Jacking .................... .542
Pretensioners
Seat Belts .............................59
Programmable Electronic Features ............ .331
Radial Ply Tires ......................... .485
Radiator Cap (Coolant Pressure Cap) .......... .580
Radio Operation ......................... .391
Rear Axle (Differential) .................... .590
Rear Swing Gate ...........................44
Rear Window Defroster .................... .294
10 INDEX 645