clutch JEEP COMMANDER 2008 1.G Owners Manual

To Deactivate
A soft tap on the brake pedal, pulling the speed control
lever towards you ªCANCELº, or normal brake or clutch
pressure while slowing the vehicle will deactivate speed
control without erasing the set speed memory. Pressing
the ON/OFF button or turning off the ignition switch
erases the set speed memory.
To Resume Speed
To resume a previously set speed, push the ªRESUME
ACCELº lever up and release. Resume can be used at any
speed above 30 mph (48 km/h) for 3.7L/4.7L engines,
and 25 mph (40 km/h) for 5.7L engines.
To Vary The Speed Setting
When the speed control is ON, speed can be increased by
pushing up and holding ªRESUME ACCELº. Release the
lever when the desired speed is reached, and the new
speed will be set.Tapping ªRESUME ACCELº once will result ina2mph
(3 km/h) (3.7L/4.7L models) or a 1 mph (2 km/h) (5.7L
models) speed increase. Each time the lever is tapped,
speed increases so that tapping the lever three times will
increase speed by 6 mph (10 km/h) (3.7L/4.7L models) or
3 mph (5 km/h) (5.7L models).
To decrease speed while speed control is ON, push down
and hold ªSET DECELº. Release the lever when the
desired speed is reached, and the new speed will be set.
Tapping the ªSET DECELº button once will result in a 1
mph (2 km/h) speed decrease. Each time the button is
tapped, speed decreases.
NOTE:The Speed Control system has been designed to
shut down if multiple speed control switch functions are
operated simultaneously in order to ensure proper op-
eration. If this occurs, the system can be reactivated by
pushing the speed control switch ON/OFF button and
re-setting the desired vehicle SET speed.
138 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

NOTE:To select the proper gear position for maximum
deceleration (engine braking), move the shift lever to the
left ªD(-)º and hold it there. The transmission will shift to
the range from which the vehicle can best be slowed
down.
Overdrive Operation
The automatic transmission includes an electronically
controlled Overdrive (5th gear for 3.7L engine, 4th and
5th gears for 4.7L and 5.7L engines). The transmission
will automatically shift from direct gear to Overdrive if
the following conditions are present:
²the transmission selector is in D (Drive);
²the engine coolant has reached normal operating tem-
perature;
²vehicle speed is above approximately 30 mph (48
km/h);
²the ªTOW/HAULº switch has not been activated;
²transmission has reached normal operating tempera-
ture.
NOTE:If the vehicle is started in extremely cold tem-
peratures, the transmission may not shift into Overdrive
and will automatically select the most desirable gear for
operation at this temperature. Normal operation will
resume when the transmission fluid temperature has
risen to a suitable level. Refer also to the Note under
torque converter clutch, later in this section.
During cold temperature operation you may notice de-
layed upshifts depending on engine and transmission
temperature. This feature improves the warm up time of
the engine and transmission.
If the transmission temperature gets extremely hot, the
transmission will automatically select the most desirable
gear for operation at this temperature. If the transmission
temperature becomes hot enough, the ªTRANSMISSION
286 STARTING AND OPERATING

activated. Pressing the switch a second time restores
normal operation. If the ªTOW/HAULº mode is desired,
the switch must be pressed each time the engine is
started.
Transmission Limp Home Mode
Transmission function is monitored for abnormal condi-
tions. If a condition is detected that could result in
transmission damage, the transmission limp home mode
will be engaged. In this mode, the transmission will
remain in the current gear (3.7L engine) or in direct gear
(4.7L and 5.7L engines) until the vehicle is brought to a
stop.
To reset the transmission, use the following procedure:
1. Stop the vehicle.
2. Move the shift lever to the P (Park) position.
3. Turn off the engine, be sure to turn the key to the
LOCK position.4. Wait approximately 10 seconds, then restart the en-
gine.
5. Move the shift lever to the desired gear range.
If the problem is no longer detected, the transmission will
return to normal operation. If the problem persists, P
(Park), R (Reverse), and N (Neutral) will continue to
operate. Only 2nd gear (3.7L engine) or 3rd gear (4.7L
and 5.7L engines) will be available in the D (Drive)
position. Have the transmission checked at your autho-
rized dealer as soon as possible.
Torque Converter Clutch
A feature, designed to improve fuel economy, has been
included in the automatic transmission on your vehicle.
A clutch within the torque converter engages automati-
cally at a calibrated speed at light throttle. It engages at
higher speeds under heavier acceleration. This may re-
sult in a slightly different feeling or response during
normal operation in high gear. When the vehicle speed
288 STARTING AND OPERATING

drops below a calibrated speed, or during acceleration,
the clutch automatically and smoothly disengages. The
feature is operational in Overdrive and in Drive.
NOTE:The torque converter clutch will not engage
until the transmission fluid and engine coolant are warm
[usually after 1-3 miles (1.6 - 4.8 km) of driving]. Because
the engine speed is higher when the torque converter
clutch is not engaged, it may seem as if the transmission
is not shifting into Overdrive when cold. This is normal.
Manually shifting (using the ERS shift control) between 4
(direct gear) and 5/D (Overdrive gear) positions will
demonstrate that the transmission is able to shift into and
out of Overdrive.
NOTE:If the vehicle has not been driven in several
days, the first few seconds of operation after shifting the
transmission into gear may seem sluggish. This is due to
the fluid partially draining from the torque converter into
the transmission. This condition is normal and will notcause damage to the transmission. The torque converter
will refill within five seconds of shifting from Park into
any other gear position.
Rocking the Vehicle
If the vehicle becomes stuck in snow, sand, or mud, it can
often be moved by a rocking motion. Move the gear
selector rhythmically between D (Drive) and R (Reverse),
while applying slight pressure to the accelerator.
NOTE:The Electronic Stability Program (ESP) and
Traction Control (if equipped) should be turned OFF
before attempting to rock the vehicle. Refer to ªElectronic
Brake Control Systemº in Section 3 of this manual.
The least amount of accelerator pedal pressure to main-
tain the rocking motion without spinning the wheels or
racing the engine is most effective. Racing the engine or
spinning the wheels, due to the frustration of not freeing
the vehicle, may lead to transmission overheating and
failure. Allow the engine to idle with the transmission
STARTING AND OPERATING 289
5

LOW Indicator Lampº in the instrument cluster will flash
and go out when the shift is complete. Release the
T-handle.
NOTE:If shift conditions/interlocks are not met, or a
transfer case motor temperature protection condition
exists, a ªCHECK SHIFT PROCEDURESº message will
flash from the EVIC (Electronic Vehicle Information Cen-
ter). Refer to ªElectronic Vehicle Information Center
(EVIC)º in Section 4 of this manual.
NOTE:Shifting into or out of 4WD LOW is possible
with the vehicle completely stopped, however difficulty
may occur due to the mating clutch teeth not being
properly aligned. Several attempts may be required for
clutch teeth alignment and shift completion to occur. The
preferred method is with the vehicle rolling 0 to 3 mph (0
to 5 km/h). If the vehicle is moving faster than 3 mph (5
km/h), the transfer case will not allow the shift.Neutral (N) Shift Procedure
1. Key ON, engine off.
2. Vehicle stopped, with foot on brake.
3. Place transmission in N (Neutral).
4. Hold down N (Neutral) ªpinº switch (with a pen, etc.)
for 4 seconds until the LED lamp by the switch starts to
blink indicating shift in progress. Lamp will stop blinking
(stay on solid) when Neutral shift is complete. A ª4WD
SYSTEM IN NEUTRALº message will display on the
EVIC (Electronic Vehicle Information Center). Refer to
ªElectronic Vehicle Information Center (EVIC)º in Sec-
tion 4 of this manual.
294 STARTING AND OPERATING

Cav-
ityCartridge
FuseMini Fuse Description
11 40 Amp
GreenHVAC Blower
12 30 Amp
PinkRear Wiper, Ign R/O
13 40 Amp
GreenRear Window De-
froster (EBL)/Heated
Mirror
14 30 Amp
PinkRear HVAC (If
Equipped)
15 Ð Spare
16 50 Amp
RedASD
17 30 Amp
PinkABS Pump
18 40 Amp
GreenAccessory Delay, SeatsCav-
ityCartridge
FuseMini Fuse Description
19 40 Amp
GreenJB Power
20 Ð Spare
21 20 Amp
YellowFuel Pump
22 20 Amp
YellowTCM, A/C Clutch
23 25 Amp
NaturalPower Inverter
24 20 Amp
YellowRear Heated Seats
25 20 Amp
YellowFinal Drive Control
Module (FDCM)
26 15 Amp
BlueBrake Lamps
MAINTAINING YOUR VEHICLE 423
7

Life of Tires.......................... 320
Load Capacity...................... 311,312
Pressure Monitor System (TPMS)........... 323
Pressure Warning Light.................. 190
Quality Grading....................... 454
Radial.............................. 318
Replacement......................... 320
Rotation............................. 322
Safety............................72,306
Sizes............................... 308
Spare Tire........................... 369
Spinning............................ 318
Tread Wear Indicators................... 319
Wheel Mounting....................... 373
Tongue Weight/Trailer Weight.............. 352
Torque Converter Clutch.................. 288
Tow Hooks, Emergency................... 377
Tow/Haul Indicator Light................. 192
Towing............................346,378Disabled Vehicle....................... 378
Guide.............................. 350
Recreational.......................... 359
Weight.............................. 350
Traction Control......................... 140
Traction Control Light.................... 189
Trailer Sway Control (TSC)................. 147
Trailer Towing.......................... 346
Cooling System Tips.................... 358
Hitches............................. 350
Minimum Requirements................. 353
Trailer and Tongue Weight................ 352
Wiring.............................. 356
Trailer Towing Guide..................... 350
Trailer Weight.......................... 350
Transfer Case........................... 410
Maintenance.......................... 410
Transmission
Automatic........................283,411
INDEX 475
10