2009 JEEP COMMANDER differential

Quadra-Drive IISystem — If Equipped
The optional Quadra-Drive IISystem features three
torque transfer couplings. The couplings include ELSD
(Electronic Limited-Slip Differential) front and rear axles
and Quadra-Trac IItransfer case. The optional ELSD
axles are fully automatic and require no driver input to
operate. Under normal driving conditions, the units
function as standard axles, balancing torque evenly be-
tween left and right wheels. With a traction difference
between left and right wheels, the coupling will sense a
speed difference. As one wheel begins to spin faster than
the other, torque will automatically transfer from the
wheel that has less traction, to the wheel that has traction.
While the transfer case and axle couplings differ in
design, their operation is similar. Follow the Quadra-Trac
IItransfer case shifting information, preceding this
section, for shifting this system.
ON-ROAD DRIVING TIPS
Utility vehicles have higher ground clearance and a
narrower track to make them capable of performing in a
wide variety of off-road applications. Specific design
characteristics give them a higher center of gravity than
ordinary cars.
An advantage of the higher ground clearance is a better
view of the road, allowing you to anticipate problems.
They are not designed for cornering at the same speeds as
conventional two-wheel drive vehicles any more than
low-slung sports cars are designed to perform satisfacto-
rily in off-road conditions. If at all possible, avoid sharp
turns or abrupt maneuvers. As with other vehicles of this
type, failure to operate this vehicle correctly may result in
loss of control or vehicle rollover.
312 STARTING AND OPERATING

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) and engine
power is reduced to provide enhanced acceleration andstability. 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 for more
information.
BAS (Brake Assist System)
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
324 STARTING AND OPERATING

Chassis
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission MOPARATF+4 Automatic Transmission Fluid
Transfer Case (NV140 Single Speed
Only)MOPARATF+4 Automatic Transmission Fluid
Transfer Case (NV245 Two Speed
Only)MOPARNV 247/245 Transfer Case Lubricant
Axle Differential (Front-Rear) MOPARSynthetic Gear & Axle Lubricant SAE 75W-140 (API-GL5) or
equivalent with friction modifier 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 rec-
ommended brake fluids.
Power Steering Reservoir This system requires the use of MOPARHydraulic System Power Steer-
ing Fluid (P/N 05142893AA) or equivalent, which meets Chrysler Material
Standard MS-10838.
MAINTAINING YOUR VEHICLE 467
7

Folding Rear Seat.....................128,132
Four Wheel Drive....................... 307
Operation........................... 307
Systems............................. 307
Four Wheel Drive Operation................ 307
Four-Way Hazard Flasher.................. 400
Freeing A Stuck Vehicle................... 306
Front Axle (Differential)................... 438
Front Heated Seats....................... 125
Fuel................................. 367
Filler Cap (Gas Cap).................... 375
Gasoline............................ 367
Gauge.............................. 199
Materials Added....................... 370
Octane Rating........................ 367
Requirements......................... 465
Tank Capacity........................ 465
Fuel, Flexible.............See Flexible Fuel Vehicles
Fuel System Caution................370,376,377Fuses................................ 449
Garage Door Opener (HomeLink) ........... 162
Gas Cap (Fuel Filler Cap)............375,377,418
Gasoline (Fuel)......................... 367
Gasoline, Reformulated................... 368
Gasoline/Oxygenate Blends................ 368
Gauges
Coolant Temperature................... 196
Fuel............................... 199
Speedometer......................... 191
Tachometer.......................... 194
Gear Ranges........................... 299
General Information...............20,26,116,366
Glass Cleaning.......................... 448
Gross Axle Weight Rating...............378,381
Gross Vehicle Weight Rating.............378,380
GVWR............................... 378
502 INDEX

Pedals, Adjustable....................... 152
Personal Settings........................ 212
Pets.................................. 73
Pets, Transporting........................ 73
Phone, Cellular.......................... 88
Phone, Hands-Free (UConnect) .............. 88
Placard, Tire and Loading Information......... 342
Polishing and Waxing..................... 444
Power
Distribution Center (Fuses)............... 451
Door Locks........................... 30
Inverter............................. 175
Lift Gate............................. 39
Mirrors.............................. 86
Outlet (Auxiliary Electrical Outlet).......... 173
Seats............................... 123
Steering............................. 317
Sunroof............................. 169
Windows............................. 34Pregnant Women and Seat Belts.............. 52
Preparation for Jacking.................... 404
Pretensioners
Seat Belts............................ 50
Programmable Electronic Features............ 212
Programming Transmitters
(Remote Keyless Entry).................... 21
Quadra-Trac........................... 307
Radial Ply Tires......................... 349
Radio Operation........................ 270
Radio, Satellite.......................262,267
Rain Sensitive Wiper System................ 150
Rear Air Conditioning.................... 281
Rear Axle (Differential).................... 438
Rear Camera........................... 160
Rear Cupholder......................... 176
Rear Heated Seats....................... 126
508 INDEX