2010 JEEP GRAND CHEROKEE clutch

•transmission has reached normal operating
temperature.
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 to the “Note” under
“Torque Converter Clutch” in this section.
During cold temperature operation you may notice de-
layed upshifts, depending on engine and transmission
temperature. This feature improves the warmup 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 “TRANSMISSION OVER TEMP” message may display, and the transmis-
sion may downshift out of Overdrive until the transmis-
sion cools down. After cool down, the transmission will
resume normal operation.
In high ambient temperatures with sustained high engine
speed and load, an upshift, followed shortly thereafter by
a downshift, may occur. The “TOW/HAUL Indicator
Light” will turn off. This is a normal part of the overheat
protection strategy when operating in the TOW/HAUL
mode.
The transmission will downshift from Overdrive, to the
most desirable gear, if the accelerator pedal is fully
pressed at vehicle speeds above approximately 35 mph
(56 km/h).
When to Use TOW/HAUL Mode – If Equipped
When driving in hilly areas, towing a trailer, carrying a
heavy load, etc., and frequent transmission shifting oc-
curs, press the TOW/HAUL switch. This will improve
5
STARTING AND OPERATING 249

3. Turn the engine off, and be sure to turn the ignition
switch 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,
PARK, REVERSE, and NEUTRAL will continue to oper-
ate. Only second gear (3.7L engine) or third gear (5.7L
engine) will be available in the DRIVE position. Have the
transmission checked at your authorized 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 athigher 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
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 [usu-
ally after 1 to 3 miles (1.6 to 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. For vehicles
with 5.7L engines (which have two Overdrive gears),
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STARTING AND OPERATING 251

•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 prop-
erly 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 Shift Procedure
1. Turn the ignition switch to the ON position, engine off.
2. Vehicle stopped, with foot on brake.
3. Place the transmission into NEUTRAL.
4. Hold down the NEUTRAL “pin” switch (with a pen,
etc.) for four seconds until the LED light by the switch
starts to blink indicating shift in progress. The light will
stop blinking (stay on solid) when the NEUTRAL shift iscomplete. A “4WD SYSTEM IN NEUTRAL” message will
display on the Electronic Vehicle Information Center
(EVIC). Refer to “Electronic Vehicle Information Center
(EVIC)” in “Understanding Your Instrument Panel” for
further information.
5. Repeat Steps 1 to 4 to shift out of NEUTRAL.
Neutral Switch
5
STARTING AND OPERATING 257

CavityCartridge
Fuse Mini-
Fuse Description
11 40 Amp Green HVAC Blower
12 30 Amp Pink Rear Wiper, Ign R/O
13 40 Amp Green Rear Window De-
froster (EBL)/Heated
Mirror
14 30 Amp Pink Rear HVAC – If
Equipped
15 — Spare
16 50 Amp Red ASD
17 30 Amp Pink ABS Pump
18 40 Amp Green Accessory Delay, SeatsCavity
Cartridge
Fuse Mini-
Fuse Description
19 40 Amp Green JB Power
20 30 Amp Pink Wiper Motor
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
402 MAINTAINING YOUR VEHICLE

Spinning............................ 299
Tread Wear Indicators ................... 300
Wheel Mounting ...................... 354
Tongue Weight/Trailer Weight .............. 331
Torque Converter Clutch .................. 251
Tow Hooks, Emergency ................... 359
Tow/Haul Indicator Light ................. 165
Towing ............................ 324,359
Disabled Vehicle ....................... 359
Guide .............................. 330
Recreational .......................... 338
Weight .............................. 330
Traction Control ......................... 271
Trailer Sway Control (TSC) ................. 278
Trailer Towing .......................... 324
Cooling System Tips .................... 338
Hitches ............................. 328
Minimum Requirements ................. 332
Trailer and Tongue Weight ............... 331 Wiring
.............................. 335
Trailer Towing Guide ..................... 330
Trailer Weight .......................... 330
Transfer Case ........................... 388
Maintenance ......................... 388
Transmission Automatic ........................ 245,389
Maintenance ......................... 389
Shifting ............................. 243
Transmitter Battery Service
(Remote Keyless Entry) .................... 24
Transmitter, Garage Door Opener (HomeLink) . . 128
Transmitter Programming
(Remote Keyless Entry) .................... 20
Transmitter, Remote Keyless Entry (RKE) ........ 20
Tread Wear Indicators .................... 300
Turn Signals ................... 107,159,409,410
UCI Connector ......................... 209
10
INDEX 463