2007 JEEP COMMANDER differential

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 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.
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
benefit of the system, you must apply continuous brak-
ing pressure during the stopping sequence. Do not
reduce brake pedal pressure unless braking is no longer
desired. Once the brake pedal is released, the BAS is
deactivated.
136 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Quadra-Drive II System — 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 func-
tion as standard axles balancing torque evenly between
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 2-wheel drive vehicles any more than low-
slung sports cars are designed to perform satisfactorily 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.
STARTING AND OPERATING 269
5

Chassis
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission MoparATF+4 Automatic Transmission Fluid
Transfer Case (3.7L Engines) MoparATF+4 Automatic Transmission Fluid
Transfer Case (4.7L/5.7L Engines) 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 Steering
Fluid (P/N 05142893AA) or equivalent, which meets DaimlerChrysler Ma-
terial Standard MS-10838.
404 MAINTAINING YOUR VEHICLE

Finish Care............................ 389
Flashers.............................. 340
Hazard Warning....................... 340
Turn Signal.......................... 176
Flexible Fuel Vehicles
Cruising Range........................ 313
Engine Oil........................... 313
Fuel Requirements................... 311,312
Maintenance.......................... 314
Replacement Parts..................... 313
Starting............................. 313
Flipper Glass, Liftgate..................... 33
Flooded Engine Starting................... 252
Fluid Capacities......................... 402
Fluid Leaks............................. 70
Fluid Level Checks
Automatic Transmission................. 385
Engine Oil........................... 362
Power Steering........................ 372Fluids, Lubricants and Genuine Parts.......... 403
Fog Lights..........................123,183
Fold and Tumble Rear Seat................. 108
Folding Rear Seat.....................108,111
Four Wheel Drive....................... 264
Operation........................... 264
Systems............................. 264
Four Wheel Drive Operation................ 264
Four-Way Hazard Flasher.................. 340
Freeing A Stuck Vehicle................... 263
Front Axle (Differential)................... 384
Fuel................................. 307
Filler Cap (Gas Cap).................... 314
Gasoline............................ 307
Gauge.............................. 182
Hoses.............................. 381
Materials Added....................... 309
Octane Rating........................ 307
Requirements......................... 402
INDEX 443
10

Programming Transmitters
(Remote Keyless Entry).................153,157
Quadra-Trac........................... 264
Radial Ply Tires......................... 291
Radio Broadcast Signals................... 197
Radio, Navigation....................... 220
Radio Operation...................199,213,232
Radio, Satellite.......................221,226
Radio (Sound Systems).................199,213
Rain Sensitive Wiper System................ 128
Rear Air Conditioning.................... 242
Rear Axle (Differential).................... 384
Rear Camera........................... 149
Rear Cup Holder........................ 163
Rear Heater............................ 242
Rear Park Assist System................... 144
Rear Seat, Fold and Tumble................ 108Rear Seat, Folding.....................108,111
Rear Window Defroster................... 167
Rear Window Features.................... 166
Rear Wiper/Washer...................... 166
Rearview Mirrors........................ 76
Reclining Front Seats..................... 104
Recorder, Event Data...................... 55
Recreational Towing...................... 333
Shifting into Transfer Case Neutral (N)....... 334
Shifting out of Transfer Case Neutral (N)..... 336
Reformulated Gasoline.................... 308
Refrigerant............................ 372
Reminder, Lights On..................... 123
Remote Keyless Entry (RKE)................. 19
Remote Sound System (Radio) Controls........ 230
Remote Starting System.................... 25
Replacement Bulbs....................... 401
Replacement Tires....................... 293
Reporting Safety Defects................... 433
450 INDEX