transmission JEEP GRAND CHEROKEE 2010 Owner handbook (in English)

For example, if the driver shifts the transmission
into ERS 3 (third gear), the transmission will
never shift above third gear, but can shift down
to 2 (second) or 1 (first), when needed.
NOTE:
•If you pull and hold (not tap) the shift lever
to the left (-), the transmission will down-
shift to the lowest gear that can be at-
tained without overrevving the engine.
The display will show the gear the vehicle
is in and will limit the top gear to the one
displayed.
•
If you push and hold (not tap) the shift
lever to the right (+), the transmission will
exit the gear limiting mode and shift to the
appropriate gear. The display will read D .
3.6L and 3.0L Diesel Engine
When in the DRIVE position, the first tap to the
left (-) will shift down one gear and will display
that gear. For example, if you are in DRIVE and
are in fifth gear, when you tap the shift lever one
time to the left (-), the transmission will down-
shift to fourth gear and the display will show 4.
Another tap to the left (-) will shift the transmis-
sion into third gear. 5.7L Engine
On vehicles equipped with the 5.7L engine,
use of ERS (or TOW/HAUL mode) also enables
an additional underdrive gear which is not
normally used during through-gear accelera-
tions. This additional gear improves vehicle
performance and cooling capability when tow-
ing a trailer on certain grades. ERS 1, 2, and 3
are underdrive gears; ERS 4 is direct drive. ERS
5 (Overdrive) is the same as the normal 4th
gear. When in the DRIVE position in first through
fourth gear, the first tap to the left (-) will display
the ERS designation for the current gear (the
transmission will not downshift). For example, if
you are in DRIVE and are in third (direct) gear,
when you tap the shift lever one time to the left
(-), the display will show 4 (ERS 4 is direct
gear). Another tap to the left (-) will shift the
transmission down to ERS 3 (the added under-
drive gear). When in the DRIVE position in fifth
gear, the first tap to the left (-) will downshift the
transmission and display 5 (ERS 5 is the same
as normal fourth gear). Another tap to the left (-)
will shift the transmission down to ERS 4 (direct
gear).
WARNING!
Do not downshift for additional engine braking
on a slippery surface. The drive wheels could
lose their grip and the vehicle could skid.
Screen Dis-
play
12345*D
Actual
Gear(s) Al-
lowed 1 1-2 1-3 1-4 1-5 1-5
* Applies to vehicles equipped with 5.7L
engines only.
NOTE:
To select the proper gear position for maxi-
mum deceleration (engine braking), move
the shift lever to the left “D(-)” and hold it
there. The transmission will shift to the
range from which the vehicle can best be
slowed down.
207

Overdrive Operation
The automatic transmission includes an elec-
tronically controlled Overdrive (fifth gear for
3.6L and 3.0L Diesel engine, fourth and fifth
gears for 5.7L engine). The transmission will
automatically shift to Overdrive, if the following
conditions are present:
•the shift lever is in DRIVE;
• the engine coolant has reached normal op-
erating temperature;
• vehicle speed is above approximately
30 mph (48 km/h);
• the TOW/HAUL switch has not been acti-
vated;
• transmission has reached normal operating
temperature.
NOTE:
If the vehicle is started in extremely cold
temperatures, 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 tem-
perature has risen to a suitable level. Refer to the “Note” under “Torque Converter
Clutch” in this section.
During cold temperature operation you may
notice delayed upshifts, depending on en-
gine and transmission temperature. This
feature improves the warm-up time of the
engine and transmission.
If the transmission temperature gets ex-
tremely hot, the transmission will automati-
cally select the most desirable gear for op-
eration at this temperature. If the
transmission temperature becomes hot
enough, the “TRANSMISSION OVER TEMP”
message may display, and the transmission
may downshift out of Overdrive until the
transmission cools down. After cool down,
the transmission will resume normal opera-
tion.
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 trans-
mission shifting occurs, press the TOW/HAUL
switch. This will improve performance and re-
duce the potential for transmission overheating
or failure due to excessive shifting. When oper-
ating in TOW/HAUL mode, the transmission will
shift into direct gear and Overdrive will be
enabled under steady cruise conditions.
TOW/HAUL Switch
208

The “TOW/HAUL Indicator Light” will illuminate
in the instrument cluster to indicate when the
switch has been activated. Pressing the switch
a second time restores normal operation. If the
TOW/HAUL mode is desired, the switch must
be pressed each time the engine is started.
In high ambient temperatures with sustained
high engine speed and load, an upshift, fol-
lowed 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.
Transmission Limp Home Mode
Transmission function is monitored for abnor-
mal conditions. If a condition is detected that
could result in transmission damage, the Trans-
mission Limp Home Mode will be engaged. In
this mode, the transmission will remain in the
current gear (3.6L and 3.0L Diesel engine) or in
direct gear (5.7L engine) 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 into the PARK position.
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 engine.
5. Move the shift lever to the desired gear
range.
If the problem is no longer detected, the trans-
mission will return to normal operation. If the
problem persists, PARK, REVERSE, and NEU-
TRAL will continue to operate. Only second
gear (3.6L and 3.0L Diesel 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 transmis-
sion on your vehicle. A clutch within the torque
converter engages automatically, at a cali-brated speed, at light throttle. It engages at
higher speeds under heavier acceleration. This
may result in a slightly different feeling or
response during normal operation in high gear.
When the vehicle speed drops below a cali-
brated speed, or during acceleration, the
clutch automatically and smoothly disengages.
NOTE:
•
The torque converter clutch will not en-
gage until the transmission fluid and en-
gine coolant are warm [usually 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 dem-
onstrate that the transmission is able to
shift into and out of Overdrive. For ve-
hicles with 5.7L engines (which have two
Overdrive gears), the transmission may
not shift into the top Overdrive gear (nor-
mal fifth gear) until the transmission fluid
and engine coolant are warm.
209

•If the vehicle has not been driven in sev-
eral days, the first few seconds of opera-
tion 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 con-
dition is normal and will not cause dam-
age to the transmission. The torque con-
verter will refill within five seconds after
starting the engine.
Rocking the VehicleIf the vehicle becomes stuck in snow, sand, or
mud, it can often be moved by a rocking
motion. Move the shift lever between DRIVE
and REVERSE, while applying slight pressure
to the accelerator.
NOTE:
The Electronic Stability Control (ESC) and
Traction Control System (TCS) (if equipped)
should be turned OFF before attempting to
rock the vehicle. Refer to “Electronic Brake
Control System” in “Starting and Operating”
for further information. The least amount of accelerator pedal pressure
to maintain the rocking motion, without spinning
the wheels or racing the engine, is most effec-
tive. Racing the engine or spinning the wheels
may lead to transmission overheating and fail-
ure. Allow the engine to idle with the shift lever
in NEUTRAL for at least one minute after every
five rocking-motion cycles. This will minimize
overheating and reduce the risk of transmission
failure during prolonged efforts to free a stuck
vehicle.CAUTION!
When “rocking” a stuck vehicle by moving
between “First” and REVERSE, do not spin
the wheels faster than 15 mph (24 km/h) or
drivetrain damage may result.
FOUR-WHEEL DRIVE OPERATION
Quadra-Trac II
Operating
Instructions/Precautions
The Quadra-Trac II transfer case is fully auto-
matic in the normal driving 4WD AUTO mode.
The Quadra-Trac II transfer case provides
three mode positions:
• 4WD HI
• NEUTRAL
• 4WD LOW
This transfer case is fully automatic in the 4WD
HI mode.
Transfer Case Switch
210

When additional traction is required, the 4WD
LOW position can be used to lock the front and
rear driveshafts together and force the front
and rear wheels to rotate at the same speed.
The 4WD LOW position is intended for loose,
slippery road surfaces only. Driving in the 4WD
LOW position on dry, hard-surfaced roads may
cause increased tire wear and damage to
driveline components.
When operating your vehicle in 4WD LOW, the
engine speed is approximately three times that
of the 4WD HI position at a given road speed.
Take care not to overspeed the engine and do
not exceed 25 mph (40 km/h).
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type, and
circumference on each wheel. Any difference
will adversely affect shifting and cause damage
to the transfer case.
Because four-wheel drive provides improved
traction, there is a tendency to exceed safe
turning and stopping speeds. Do not go faster
than road conditions permit.WARNING!
You or others could be injured if you leave the
vehicle unattended with the transfer case in
the N (Neutral) position without first fully en-
gaging the parking brake. The transfer case N
(Neutral) position disengages both the front
and rear driveshafts from the powertrain and
will allow the vehicle to move regardless of the
transmission position. The parking brake
should always be applied when the driver is
not in the vehicle.
Shift Positions
For additional information on the appropriate
use of each transfer case mode position, see
the information below:
4WD AUTO
This range is used on surfaces such as ice,
snow, gravel, sand, and dry hard pavement.NOTE:
Refer to “Selec-Terrain
– If Equipped” in
“Starting and Operating” for further infor-
mation on the various positions and their
intended usages.
NEUTRAL
This range disengages both the front and rear
driveshafts from the powertrain. It is to be used
for flat towing behind another vehicle. Refer to
“Recreational Towing” in “Starting and Operat-
ing” for further information.
4WD LOW
This range is for low speed four-wheel drive. It
locks the front and rear driveshafts together
and forces the front and rear wheels to rotate at
the same speed. It provides additional traction
and maximum pulling power for loose, slippery
road surfaces only. Do not exceed 25 mph
(40 km/h).
NOTE:
Refer to “Selec-Terrain – If Equipped” for
further information on the various positions
and their intended usages.
211

Shifting Procedures
4WD HI to 4WD LOW
With the vehicle at speeds of 0 to 3 mph (0 to
5 km/h), the ignition switch in the ON position or
the engine running, shift the transmission into
NEUTRAL, and press the “4WD LOW” button
once on the transfer case switch. The “4WD
LOW” indicator light in the instrument cluster
will begin to flash and remain on solid when the
shift is complete.
NOTE:
If shift conditions/interlocks are not met, or
a transfer case motor temperature protec-tion condition exists, a “For 4x4 Low Slow
Below 3 MPH or 5 KPH Put Trans in N Press
4 Low” message will flash from the Elec-
tronic Vehicle Information Center (EVIC). Re-
fer to “Electronic Vehicle Information Center
(EVIC)” in “Understanding Your Instrument
Panel” for further information.
4WD LOW to 4WD HI
With the vehicle at speeds of 0 to 3 mph (0 to
5 km/h), the ignition switch in the ON position or
the engine running, shift the transmission into
NEUTRAL, and press the “4WD LOW” button
once on the transfer case switch. The “4WD
LOW” indicator light in the instrument cluster
will flash and go out when the shift is complete.
NOTE:
•
If shift conditions/interlocks are not met,
or a transfer case motor temperature pro-
tection condition exists, a “For 4x4 High
Slow Below 3 MPH or 5 KPH Put Trans in
N Press 4 Low” message will flash from
the Electronic Vehicle Information Center
(EVIC). Refer to “Electronic Vehicle Infor- mation Center (EVIC)” in “Understanding
Your Instrument Panel” for further infor-
mation.
• Shifting into or out of 4WD LOW is pos-
sible with the vehicle completely stopped;
however, difficulty may occur due to the
mating clutch teeth not being properly
aligned. Several attempts may be re-
quired 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 is complete. A
Transfer Case Switch
212

Selec-Terrain™ consists of the following posi-
tions:
•Sport – Dry weather, on-road calibration.
Only available in 4WD High range. Perfor-
mance based tuning that provides a rear
wheel drive feel but with improved handling
and acceleration over a two-wheel drive ve-
hicle. The Electronic Stability Control will set
to allow more driver control of vehicle while
maintaining safe handling controls. The ve-
hicle will lower (if equipped with Air Suspen-
sion) to Aero Mode in High Range. 4WD Low
is not available in SPORT mode, if 4WD Low
is selected the Selec-Terrain™ will automati-
cally switch back to AUTO.
• Snow – Tuning set for additional stability in
inclement weather. Use on and off road on
loose traction surfaces such as snow. When
in Snow mode (depending on certain oper-
ating conditions), the transmission may use
second gear (rather than first gear) during
launches, to minimize wheel slippage. If
equipped with air suspension, the level will
change to Normal Ride Height (NRH) if the transfer case is in high range. The level will
change to Off-Road 1 if the transfer case is in
Low range.
• Auto – Fully automatic full time four-wheel
drive operation can be used on and off road.
Balances traction with seamless steering
feel to provide improved handling and accel-
eration over two-wheel drive vehicles. If
equipped with air suspension, the level will
change to NRH.
• Sand/Mud – Off road calibration for use on
low traction surfaces such as mud, sand, or
wet grass. Driveline is maximized for trac-
tion. Some binding may be felt on less for-
giving surfaces. The electronic brake con-
trols are set to limit traction control
management of throttle and wheel spin. If
equipped with air suspension, the level will
change to Off-Road 1.
• Rock – Off-road calibration only available in
4WD Low range. The vehicle is raised (if
equipped with Air Suspension) for improved
ground clearance. Traction based tuning
with improved steer-ability for use on high
traction off-road surfaces. Activates the Hill Descent Control for steep downhill control.
Use for low speed obstacles such as large
rocks, deep ruts, etc. If equipped with air
suspension, the vehicle level will change to
Off-Road 2. If the Selec-Terrain™ switch is in
ROCK mode, and the transfer case is
switched from 4WD Low to 4WD High, the
Selec-Terrain™ system will return to AUTO.
Electronic Vehicle Information
Center (EVIC) Display Messages
When the appropriate conditions exist, a mes-
sage will appear in the EVIC display. Refer to
“Electronic Vehicle Information Center (EVIC)”
in “Understanding Your Instrument Panel” for
further information.
QUADRA-LIFT™ — IF EQUIPPED
Description
The Quadra-Lift™ air suspension system pro-
vides full time load leveling capability along
with the benefit of being able to adjust vehicle
height by the push of a button.
214

sink into deeper water. Determine exit point(s)
that are downstream of your entry point to allow
for drifting.
Standing Water
Avoid driving in standing water deeper than
20 in (51 cm), and reduce speed appropriately
to minimize wave effects. Maximum speed in
20 in (51 cm) of water is less than 5 mph
(8 km/h).
Maintenance
After driving through deep water, inspect your
vehicle fluids and lubricants (engine oil, trans-
mission oil, axle, transfer case) to assure the
fluids have not been contaminated. Contami-
nated fluid (milky, foamy in appearance) should
be flushed/changed as soon as possible to
prevent component damage.
Driving in Snow, Mud and SandIn heavy snow, when pulling a load, or for
additional control at slower speeds, shift the
transmission to a low gear and shift the transfer
case to 4WD LOW if necessary. Refer to “Four-
Wheel Drive Operation” in “Starting and Oper-
ating” for further information. Do not shift to a
lower gear than necessary to maintain forwardmotion. Over-revving the engine can spin the
wheels and traction will be lost.
Avoid abrupt downshifts on icy or slippery
roads, because engine braking may cause
skidding and loss of control.
Hill Climbing
NOTE:
Before attempting to climb a hill, determine
the conditions at the crest and/or on the
other side.
Before climbing a steep hill,
shift the trans-
mission to a lower gear and shift the transfer
case to 4WD LOW. Use first gear and 4WD
LOW for very steep hills.
If you stall or begin to lose forward motion
while climbing a steep hill, allow your vehicle to
come to a stop and immediately apply the
brakes. Restart the engine, and shift into RE-
VERSE. Back slowly down the hill, allowing the
compression braking of the engine to help
regulate your speed. If the brakes are required
to control vehicle speed, apply them lightly and
avoid locking or skidding the tires.
WARNING!
If the engine stalls, you lose forward motion,
or cannot make it to the top of a steep hill or
grade, never attempt to turn around. To do so
may result in tipping and rolling the vehicle.
Always back carefully straight down a hill in
REVERSE gear. Never back down a hill in
NEUTRAL using only the brake.
Remember, never drive diagonally across a
hill always drive straight up or down.
If the wheels start to slip as you approach the
crest of a hill, ease off the accelerator and
maintain forward motion by turning the front
wheels slowly. This may provide a fresh “bite”
into the surface and will usually provide traction
to complete the climb.
Traction DownhillShift the transmission into a low gear, and the
transfer case into 4WD LOW range. Let the
vehicle go slowly down the hill with all four
wheels turning against engine compression
drag. This will permit you to control the vehicle
speed and direction. 219

When descending mountains or hills, repeated
braking can cause brake fade with loss of
braking control. Avoid repeated heavy braking
by downshifting the transmission whenever
possible.
After Driving Off-RoadOff-road operation puts more stress on your
vehicle than does most on-road driving. After
going off-road, it is always a good idea to
check for damage. That way you can get any
problems taken care of right away and have
your vehicle ready when you need it.
•Completely inspect the underbody of your
vehicle. Check tires, body structure, steer-
ing, suspension, and exhaust system for
damage.
• Inspect the radiator for mud and debris and
clean as required.
• Check threaded fasteners for looseness,
particularly on the chassis, drivetrain com-
ponents, steering, and suspension. Re-
tighten them, if required, and torque to the
values specified in the Service Manual. •
Check for accumulations of plants or brush.
These things could be a fire hazard. They
might hide damage to fuel lines, brake hoses,
axle pinion seals, and propeller shafts.
• After extended operation in mud, sand, wa-
ter, or similar dirty conditions, have the ra-
diator, fan, brake rotors, wheels, brake lin-
ings, and axle yokes inspected and cleaned
as soon as possible.
WARNING!
Abrasive material in any part of the brakes
may cause excessive wear or unpredictable
braking. You might not have full braking power
when you need it to prevent a collision. If you
have been operating your vehicle in dirty
conditions, get your brakes checked and
cleaned as necessary.
• If you experience unusual vibration after
driving in mud, slush or similar conditions,
check the wheels for impacted material. Im-
pacted material can cause a wheel imbal-
ance and freeing the wheels of it will correct
the situation.
POWER STEERING
3.6L Engine and 3.0L Diesel Engine
Your vehicle is equipped with an electro-
hydraulic power steering system that will give
you good vehicle response and increased ease
of maneuverability in tight spaces. The system
will vary its assist to provide light efforts while
parking and good feel while driving. If the
electro-hydraulic power steering system expe-
riences a fault that prevents it from providing
power steering assist, then the system will
provide mechanical steering capability.
CAUTION!
Extreme steering maneuvers may cause the
electrically driven pump to reduce or stop
power steering assistance in order to prevent
damage to the system. Normal operation will
resume once the system is allowed to cool.
If the “SERVICE POWER STEER-
ING SYSTEM” message and a
flashing icon are displayed on the
EVIC screen, it indicates that the
vehicle needs to be taken to the
220

CAUTION!
Do not use chemical flushes in your power
steering system as the chemicals can dam-
age your power steering components. Such
damage is not covered by the New Vehicle
Limited Warranty.
WARNING!
Fluid level should be checked on a level
surface and with the engine off to prevent
injury from moving parts and to ensure accu-
rate fluid level reading. Do not overfill. Use
only manufacturer’s recommended power
steering fluid.
If necessary, add fluid to restore to the proper
indicated level. With a clean cloth, wipe any
spilled fluid from all surfaces. Refer to “Fluids,
Lubricants, and Genuine Parts” in “Maintaining
Your Vehicle” for further information.
MULTI-DISPLACEMENT SYSTEM
(MDS) (IF EQUIPPED) — 5.7L
ENGINE ONLY
This feature offers improved fuel economy by
shutting off four of the engine’s eight cylinders
during light load and cruise conditions. The
system is automatic with no driver inputs or
additional driving skills required.
NOTE:
The MDS system may take some time to
return to full functionality after a battery
disconnect.
PARKING BRAKEBefore leaving the vehicle, make sure that the
parking brake is fully applied and place the
shift lever in the PARK position.
The foot operated parking brake is located
below the lower left corner of the instrument
panel. To apply the park brake, firmly push the
park brake pedal fully. To release the parking
brake, press the park brake pedal a second
time and let your foot up as you feel the brake
disengage. When the parking brake is applied with the
ignition switch in the ON position, the “Brake
Warning Light” in the instrument cluster will
illuminate.
NOTE:
•
When the parking brake is applied and the
transmission is placed in gear, the “Brake
Warning Light” will flash. If vehicle speed
is detected, a chime will sound to alert the
driver. Fully release the parking brake
before attempting to move the vehicle.
Parking Brake
222