differential JEEP WRANGLER 2017 JK / 3.G Owners Manual

For vehicles not equipped with an instrument cluster
display, perform the following steps:
1. Center the steering wheel (front wheels pointingstraight forward).
2. Shift the transmission into PARK.
3. Apply the parking brake.
4. Start the engine.
5. Rotate the steering wheel slightly more than one-half turn to the left.
6. Push the “ESC Off” button located in the lower switch bank below the climate control four times within 20
seconds. The “ESC Off Indicator Light” should turn on
and turn off two times.
7. Rotate the steering wheel back to center and then an additional slightly more than one-half turn to the right.
8. Turn the ignition to the OFF mode and then back to ON. If the sequence was completed properly, the “ESC Off
Indicator Light” will blink several times to confirm HSA
is disabled.
9. Repeat these steps if you want to return this feature to its previous setting.Traction Control System (TCS)
This system monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, the TCS may
apply brake pressure to the spinning wheel(s) and/or
reduce engine power to provide enhanced acceleration and
stability. A feature of the TCS, Brake Limited Differential
(BLD), 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. BLD may remain enabled even if TCS
and ESC are in a reduced mode.
Electronic Stability Control (ESC)
This system enhances directional control and stability of
the vehicle under various driving conditions. The ESC
corrects for over/under steering of the vehicle by applying
the brake of the appropriate wheel to assist in counteract-
ing the over/under steer condition. Engine power may also
be reduced to help the vehicle maintain the desired path.
ESC uses sensors in the vehicle to determine the vehicle
path intended by the driver and compares it to the actual
path of the vehicle. When the actual path does not match
218 SAFETY

ESC Full Off
This mode is entered by pushing and holding the ESC OFF
switch for five seconds.
In theESC Full Off mode, the engine torque reduction
and stability features are disabled. Therefore, the enhanced
vehicle stability offered by ESC is unavailable. In an
emergency evasive maneuver, the ESC system will not
engage to assist in maintaining stability. “ESC Full Off”
mode is intended for off-highway or off-road use only. When in
ESC Full Off mode, ESC and TCS, except for the
Brake Limited Differential (BLD) feature described in the
TCS section, are turned off until the vehicle reaches an
approximate speed of 40 mph (64 km/h). For speeds at or
exceeding approximately 40 mph (64 km/h) the ESC goes
into ESC Partial Off. When the vehicle speed drops below
35 mph (56 km/h), the ESC system goes back to ESC Full
Off. To turn ESC on again, momentarily push the ESC OFF
switch. This will restore normal “ESC On” mode of opera-
tion. The ESC Off Indicator Light” will always be illumi-
nated when ESC is in ESC Partial OffandESC full Off.
WARNING!
With the ESC in ESC Full Offmode, the engine
torque reduction and stability features offered by ESC
and ERM are disabled. In an emergency evasive ma-
neuver, the ESC and ERM systems will not engage to
assist in maintaining stability. The ESC Full Off
mode is intended for off-road use only.
ESC OFF Switch
5
SAFETY 221

4L Range (4WD Models)
ESC Full Off
This is the normal operating mode for ESC in 4L range.
Whenever the vehicle is started in 4L range, or the transfer
case (if equipped) is shifted from 4H range or NEUTRAL to
4L range, the ESC system will be in this mode. In 4L range,
ESC and TCS, except for the Brake Limited Differential (BLD)
feature described in the TCS section, are turned off until the
vehicle reaches an approximate speed of 40 mph (64 km/h).
For speeds at or exceeding approximately 40 mph (64 km/h)
the ESC goes intoESC Partial OffWhen the vehicle speed
drops below 35 mph (56 km/h), the ESC system goes back to
ESC Full Off. The ESC is in ESC Full Offat low vehicle
speeds in 4L range so that it will not interfere with off-road
driving, but the ESC function returns to provide the stability
feature at speeds above 40 mph (64 km/h). The “ESC OFF
Indicator Light” will always be illuminated in 4L range when
ESC is in ESC Full Off orESC Partial Off.
NOTE:The “ESC OFF” message will display and an audible
chime will sound when the gear selector is placed in the
PARK position from any other position, and then moved out
of the PARK position. This will occur even if the message was
previously cleared.
WARNING!
With the ESC in ESC Full Offmode, the engine
torque reduction and stability features offered by ESC
and ERM are disabled. In an emergency evasive ma-
neuver, the ESC and ERM systems will not engage to
assist in maintaining stability. The ESC Full Off
mode is intended for off-road use only.
2H Range (4WD Models) Or 2WD Models
ESC On
This is the normal operating mode for ESC in 2H range and
on 2WD vehicles.
ESC Partial Off
When in ESC Partial Off mode, the TCS portion of ESC
(except for the limited slip feature described in the TCS
section), has been disabled and the ESC Off Indicator
Light will be illuminated.
This mode is intended to be used if the vehicle is in deep
snow, sand, or gravel conditions and more wheel spin than
ESC would normally allow is required to gain traction. To
turn ESC on again, momentarily push the ESC OFF switch.
This will restore the normal ESC Onmode of operation.
222 SAFETY

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 propor-
tions 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 maximum
traction.
WARNING!
On vehicles equipped with a limited-slip differential,
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.
Axle Lock (Tru–Lok) — Rubicon Models
The AXLE LOCK switch is located on the instrument panel
(to the left of the steering column).This feature will only activate when the following condi-
tions are met:
•
Key in ignition, vehicle in 4L (Low) range.
• Vehicle speed should be 10 mph (16 km/h) or less.
To activate the system, push the bottom of the AXLE LOCK
switch once to lock the rear axle only (the “Rear Axle Lock
Indicator Light” will illuminate), push the bottom of the
switch again to lock the front axle (the “Front Axle Lock
Indicator Light” will illuminate). When the rear axle is
locked, pushing the bottom of switch again will lock or
unlock the front axle.
Axle Lock Switch
6
STARTING AND OPERATING 305

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 are designated
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 (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 ingestion.
CAUTION!
•Water ingestion into the axles, transmission, transfer
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 determine
if you can cross it safely and responsibly. If necessary, 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
338 STARTING AND OPERATING

Chassis
ComponentFluid, Lubricant, or Genuine Part
Automatic Transmission – If Equipped Use only ATF+4 Automatic Transmission Fluid. Failure to
use ATF+4 fluid may affect the function or performance of
your transmission. We recommend MOPAR ATF+4 fluid.
Manual Transmission – If Equipped We recommend you use MOPAR Manual Transmission
Lubricant meeting the requirements of FCA Material Stan-
dard MS-9224.
Transfer Case We recommend you use MOPAR ATF+4 Automatic Trans-
mission Fluid.
Axle Differential (Front) We recommend you use MOPAR Gear & Axle Lubricant
(SAE 80W-90) (API GL-5).
Axle Differential (Rear) 226 RBI (Model 44)– We recommend you use MOPAR
Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equiva-
lent. For trailer towing, use MOPAR Synthetic Gear & Axle
Lubricant (SAE 75W-140). Models equipped with Trac-Lok
require an additive.
Brake Master Cylinder We recommend you use MOPAR DOT 3 Brake Fluid, SAE
J1703. If DOT 3, SAE J1703 brake fluid is not available, then
DOT 4 is acceptable.
Power Steering Reservoir We recommend you use MOPAR Power Steering Fluid +4,
MOPAR ATF+4 Automatic Transmission Fluid.
9
TECHNICAL SPECIFICATIONS 445

FiltersAir Cleaner ............................ .381
Air Conditioning ..................... .69, 387
Engine Oil ......................... .381, 443
Engine Oil Disposal ...................... .381
Flashers Hazard Warning ........................ .342
Turn Signal ..................... .282, 344, 345
Flash-To-Pass ..............................53
Flooded Engine Starting ..................... .286
Fluid, Brake ............................. .445
Fluid Capacities ........................... .442
Fluid Leaks .............................. .282
Fluid Level Checks ........................ .401
Brake ................................ .400
Engine Oil ............................ .378
Manual Transmission ..................... .405
Power Steering ......................... .308
Fluids And Lubricants ...................... .443
Fog Lights ............................ .53, 344
Fog Light Service .......................... .344
Fold And Tumble Rear Seat ....................42
Folding Rear Seat ...........................44
Folding Windshield ........................ .166
Four-Way Hazard Flasher .....................342 Four Wheel Drive
......................... .301
Operation ............................. .301
Shifting .............................. .301
Systems .............................. .301
Four Wheel Drive Operation ..................301
Freeing A Stuck Vehicle ..................... .363
Front Axle (Differential) ..................... .401
Fuel ................................... .438
Adding .............................. .312
Additives ............................. .438
Clean Air ............................. .438
Ethanol .............................. .439
Filler
Cap (Gas Cap) ..................... .312
Gasoline .............................. .438
Gauge ............................... .202
Materials Added ........................ .438
Methanol ............................. .439
Octane Rating ....................... .438, 443
Requirements .......................... .442
Specifications .......................... .443
Tank Capacity .......................... .442
Fueling ................................. .312
Fuses .................................. .346
Gas Cap (Fuel Filler Cap) ..............211,312, 313
514 INDEX

Radio Operation.......................... .471
Rear Axle (Differential) ..................... .401
Rear Swing Gate .......................... .172
Rear Wiper/Washer ..........................60
Recreational Towing ........................ .327
Shifting Into Transfer Case Neutral (N) .........328
Shifting Out Of Transfer Case Neutral (N) .......329
Reformulated Gasoline ...................... .438
Refrigerant .............................. .386
Reminder, Seat Belt ........................ .237
Remote Control Starting System ...........................22
Remote Sound System (Radio) Controls ...........469
Remote Starting System .......................22
Replacement Bulbs ........................ .342
Replacement Keys ...........................25
Replacement Tires ......................... .418
Reporting Safety Defects .....................506
Resetting Oil Change Indicator .................195
Restraint, Head .............................46
Restraints, Child .......................... .259
Roll Over Warning ...........................4
Rotation, Tires ............................ .424
Safety Checks Inside Vehicle ...................280 Safety Checks Outside Vehicle
.................282
Safety Defects, Reporting .....................506
Safety, Exhaust Gas ........................ .279
Safety Information, Tire ..................... .405
Safety Tips .............................. .279
Satellite Radio Antenna ..................... .465
Schedule, Maintenance ...................... .371
Seat Belt Adjustable Upper Shoulder Belt Anchorage ......243
Automatic Locking Retractor (ALR) ...........246
Energy Management Feature ................245
Lap/Shoulder Belt Operation ................241
Lap/Shoulder Belts ...................... .239
Lap/Shoulder Belt Untwisting ...............243
Pr
egnant Women ........................ .245
Seat Belt Extender ....................... .244
Seat Belt Pretensioner .....................245
Seat Belt Reminder ...................... .237
Seat Belt Maintenance ...................... .432
Seat Belt Reminder ........................ .237
Seat Belts ............................ .237, 280
Adjustable Shoulder Belt ...................243
Adjustable Upper Shoulder Anchorage .........243
Child Restraint ......................... .259
Extender .............................. .244
12
INDEX 519