2011 JEEP WRANGLER differential

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 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). Once the shift
is completed, place the automatic transmission into
DRIVE or release the clutch pedal on a manual transmis-
sion.
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 a collision. 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 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.
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STARTING AND OPERATING 387

engine braking to control the descent and apply your
brakes, if necessary, but do not allow the tires to lock.
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
manner. You should only drive through areas which aredesignated and approved. You should tread lightly and
avoid damage to the environment. You should know
your vehicle’s abilities and be able to recover it if
something 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 first gear (manual transmission), or DRIVE (auto-
matic 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
ingestion.
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STARTING AND OPERATING 401

vehicle stability and control in various driving condi-
tions, and are commonly referred to as ESC.
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, brakepressure 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
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STARTING AND OPERATING 411

Chassis
ComponentFluid, Lubricant, or Genuine Part
Automatic Transmission – If
Equipped MOPAR
ATF+4Automatic Transmission Fluid or equivalent licensed
ATF+4 product.
Manual Transmission – If
Equipped MOPAR
Manual Transmission Lubricant or equivalent (meeting the re-
quirements of Chrysler Material Standard MS-9224).
Transfer Case MOPARATF+4Automatic Transmission Fluid or equivalent licensed
ATF+4 product.
Axle Differential (Front) MOPARGear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 226 RBI (Model 44)- MOPARGear & 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 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 MOPAR Power Steering Fluid +4, MOPARATF+4Automatic Transmis-
sion Fluid or equivalent licensed ATF+4 product.
7
MAINTAINING YOUR VEHICLE 551

Fabric Care......................... 535,536
Fabric Top ............................. 536
Filters Air Cleaner ......................... 512
Air Conditioning ..................... 362
Engine Oil ......................... 512
Finish Care ............................ 533
Flashers Hazard Warning ..................... 484
Turn Signal ................. 89,267,547,548
Flooded Engine Starting ................... 371
Fluid Capacities ......................... 549
Fluid Leaks ............................. 89
Fluid Level Checks ...................... 532
Automatic Transmission ................ 527
Engine Oil ......................... 510
Manual Transmission .................. 530
Power Steering ...................... 406
Fluids, Lubricants and Genuine Parts .......... 550Fog Light Service
........................ 547
Fog Lights .......................... 152,547
Fold and Tumble Rear Seat ................. 144
Folding Rear Seat ........................ 146
Folding Windshield ...................... 253
Four Wheel Drive ....................... 383
Shifting ........................... 385
Four Wheel Drive Operation ................ 383
Four-Way Hazard Flasher .................. 484
Freeing A Stuck Vehicle ................... 495
Front Axle (Differential) ................... 531
Fuel ................................. 452
Ethanol ........................... 453
Filler Cap (Gas Cap) .................. 457
Gasoline ........................... 452
Gauge ............................ 266
Materials Added ..................... 455
Methanol .......................... 453
Octane Rating ....................... 452
10
INDEX 587

Onboard Diagnostic System..............506,507
Operator Manual (Owner’s Manual) ............ 6
Outside Rearview Mirrors .................. 97
Overheating, Engine ................... 271,484
Owner’s Manual (Operator Manual) .........6,577
Paint Care ............................. 532
Paint Damage .......................... 532
Panic Alarm ............................ 23
Parking Brake .......................... 406
Passing Light ........................... 152
Personal Settings ........................ 294
Pets .................................. 84
Phone, Cellular .......................... 99
Phone, Hands-Free (Uconnect™) .............. 99
Placard, Tire and Loading Information ......... 432
Polishing and Waxing ..................... 533 Power
Door Locks ......................... 34
Inverter ........................... 166
Mirrors ............................ 98
Steering ........................ 405,406
Windows ........................... 40
Pregnant Women and Seat Belts .............. 58
Preparation for Jacking .................... 487
Pretensioners Seat Belts ........................... 56
Programmable Electronic Features ............ 294
Radial Ply Tires ......................... 439
Radio Operation ........................ 351
Rear Axle (Differential) .................... 531
Rear Swing Gate ......................... 42
Rear Window Defroster ................... 260
Rear Window Features .................... 259
Rear Wiper/Washer ...................... 259
10
INDEX 593