2013 JEEP GRAND CHEROKEE engine

Overdrive Operation
The automatic transmission includes an elec-
tronically controlled Overdrive (fifth gear). The
transmission will automatically shift into Over-
drive if the following conditions are present:
•the shift lever is in the DRIVE position,
• vehicle speed is sufficiently high, and
• the driver is not heavily pressing the
accelerator.
Six-Speed Automatic Transmission
(5.7L Engine) — If Equipped
The shift lever position display (located in the
instrument cluster) indicates the transmission
gear range. You must press the brake pedal to
move the shift lever out of PARK (refer to
“Brake/Transmission Shift Interlock System” in
this section). To drive, move the shift lever from
PARK or NEUTRAL to the DRIVE position. The electronically-controlled transmission pro-
vides a precise shift schedule. The transmission
electronics are self-calibrating; therefore, the
first few shifts on a new vehicle may be some-
what abrupt. This is a normal condition, and
precision shifts will develop within a few hun-
dred kilometers.
Only shift from DRIVE to PARK or REVERSE
when the accelerator pedal is released and the
vehicle is stopped. Be sure to keep your foot on
the brake pedal when moving the shift lever
between these gears.
The transmission shift lever has only PARK,
REVERSE, NEUTRAL, and DRIVE shift posi-
tions. Manual downshifts can be made using
the Electronic Range Select (ERS) shift control
(refer to “Electronic Range Select (ERS) Opera-
tion” in this section). Moving the shift lever to the
left or right (-/+) while in the DRIVE position will
select the highest available transmission gear,
and will display that gear in the instrument
cluster as 6, 5, 4, 3, 2, 1.Gear RangesDO NOT race the engine when shifting from
PARK or NEUTRAL into another gear range.
NOTE:
•
After selecting any gear range, wait a
moment to allow the selected gear to
engage before accelerating. This is espe-
cially important when the engine is cold.
Shift Lever
231

•If there is a need to restart the engine, be
sure to cycle the ignition to the OFF
position before restarting. Transmission
gear engagement may be delayed after
restarting the engine if the key is not
cycled to the OFF position first.
PARK
This range supplements the parking brake by
locking the transmission. The engine can be
started in this range. Never attempt to use
PARK while the vehicle is in motion. Apply the
parking brake when leaving the vehicle in this
range.
When parking on a level surface, you may place
the shift lever in PARK first, and then apply the
parking brake.
When parking on a hill, apply the parking brake
before placing the shift lever in PARK, otherwise
the load on the transmission locking mecha-
nism may make it difficult to move the shift lever
out of PARK. As an added precaution, turn the
front wheels toward the curb on a downhill
grade and away from the curb on an uphill
grade.WARNING!
• Never use the PARK position as a substi-
tute for the parking brake. Always apply
the parking brake fully when parked to
guard against vehicle movement and pos-
sible injury or damage.
• Your vehicle could move and injure you
and others if it is not completely in PARK.
Check by trying to move the shift lever out
of PARK with the brake pedal released.
Make sure the transmission is in PARK
before leaving the vehicle.
• It is dangerous to shift out of PARK or
NEUTRAL if the engine speed is higher
than idle speed. If your foot is not firmly
pressing the brake pedal, the vehicle could
accelerate quickly forward or in reverse.
You could lose control of the vehicle and
hit someone or something. Only shift into
gear when the engine is idling normally
and your foot is firmly pressing the brake
pedal.
(Continued)
WARNING!(Continued)
•Unintended movement of a vehicle could
injure those in or near the vehicle. As with
all vehicles, you should never exit a ve-
hicle while the engine is running. Before
exiting a vehicle, always apply the parking
brake, shift the transmission into PARK
turn the engine OFF, and remove the key
fob. When the ignition is in the LOCK/OFF
position, the shift lever is locked in PARK,
securing the vehicle against unwanted
movement.
• When leaving the vehicle, always remove
the key fob and lock your vehicle.
• Never leave children alone in a vehicle, or
with access to an unlocked vehicle.
• Allowing children to be in a vehicle unat-
tended is dangerous for a number of rea-
sons. A child or others could be seriously
or fatally injured. Children should be
warned not to touch the parking brake,
brake pedal or the shift lever.
(Continued)
232

WARNING!(Continued)
•Do not leave the key fob in or near the
vehicle (or in a location accessible to chil-
dren), and do not leave Keyless Enter-N-
Go™ in the ACC or ON/RUN position.
A child could operate power windows,
other controls, or move the vehicle.
CAUTION!
• Before moving the shift lever out of PARK,
you must turn the ignition switch from the
OFF position to the ON/RUN position, and
also press the brake pedal. Otherwise,
damage to the shift lever could result.
• DO NOT race the engine when shifting
from PARK or NEUTRAL into another gear
range, as this can damage the drivetrain. The following indicators should be used to
ensure that you have engaged the shift lever
into the PARK position:
•
When shifting into PARK, firmly move the
shift lever all the way forward and to the left
until it stops and is fully seated.
• Look at the shift lever position display and
verify that it indicates the PARK position.
• With brake pedal released, verify that the
shift lever will not move out of PARK.
REVERSE
This range is for moving the vehicle backward.
Shift into REVERSE only after the vehicle has
come to a complete stop.
NEUTRAL
Use this range when the vehicle is standing for
prolonged periods with the engine running. The
engine may be started in this range. Apply the
parking brake and shift the transmission into
PARK if you must leave the vehicle.
WARNING!
Do not coast in NEUTRAL and never turn off
the ignition to coast down a hill. These are
unsafe practices that limit your response to
changing traffic or road conditions. You might
lose control of the vehicle and have a collision.
CAUTION!
Towing the vehicle, coasting, or driving for
any other reason with the transmission in
NEUTRAL can cause severe transmission
damage. Refer to “Recreational Towing” in
“Starting And Operating” and “Towing A Dis-
abled Vehicle” in “What To Do In Emergen-
cies” for further information.
233

DRIVE
This range should be used for most city and
highway driving. It provides the smoothest up-
shifts and downshifts, and the best fuel
economy. The transmission automatically up-
shifts through underdrive first and second
gears, direct third gear and overdrive fourth and
fifth gears. The DRIVE position provides opti-
mum driving characteristics under all normal
operating conditions.
To access all six available gears, you must use
the Electronic Range Select (ERS) shift control
(refer to “Electronic Range Select (ERS) Opera-
tion” in this section).
When frequent transmission shifting occurs
(such as when operating the vehicle under
heavy loading conditions, in hilly terrain, travel-
ing into strong head winds, or while towing
heavy trailers), use the Electronic Range Select
(ERS) shift control (refer to “Electronic Range
Select (ERS) Operation” in this section) to se-
lect a lower gear range. Under these conditions,
using a lower gear range will improve perfor-
mance and extend transmission life by reducing
excessive shifting and heat buildup.If the transmission temperature exceeds normal
operating limits, the powertrain controller will
modify the transmission shift schedule and ex-
pand the range of torque converter clutch en-
gagement. This is done to prevent transmission
damage due to overheating.
If the transmission becomes extremely hot or is
in danger of overheating, the “Transmission
Temperature Warning Light” may illuminate and
the transmission may operate differently until
the transmission cools down.
NOTE:
Use caution when operating a heavily
loaded vehicle at low speeds (such as tow-
ing a trailer up a steep grade, or in stop-
and-go traffic) during hot weather. In these
conditions, torque converter slip can im-
pose a significant additional heat load on
the cooling system. Downshifting the trans-
mission to the lowest possible gear (when
climbing a grade), or shifting to NEUTRAL
(when stopped in heavy traffic) can help to
reduce this excess heat generation.
During cold temperatures, transmission opera-
tion may be modified depending on engine andtransmission temperature as well as vehicle
speed. This feature improves warm up time of
the engine and transmission to achieve maxi-
mum efficiency. Engagement of both the torque
converter clutch and the top overdrive gear are
inhibited until the transmission fluid is warm
(refer to the “Note” under “Torque Converter
Clutch” in this section). During extremely cold
temperatures (-16°F [-27°C] or below), opera-
tion may briefly be limited to first and direct
gears only. Normal operation will resume once
the transmission temperature has risen to a
suitable level.
Transmission Limp Home Mode
Transmission function is monitored electroni-
cally for abnormal conditions. If a condition is
detected that could result in transmission dam-
age, Transmission Limp Home Mode is acti-
vated. In this mode, the transmission remains in
direct gear regardless of which forward gear is
selected. PARK, REVERSE, and NEUTRAL will
continue to operate. The Malfunction Indicator
Light (MIL) may be illuminated. Limp Home
Mode allows the vehicle to be driven to an
authorized dealer for service without damaging
the transmission.
234

In the event of a momentary problem, the
transmission can be reset to regain all forward
gears by performing the following steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
3. Turn the ignition switch to the LOCK/OFF
position.
4. Wait approximately 10 seconds.
5. Restart the engine.
6.
Shift into the desired gear range. If the prob-
lem is no longer detected, the transmission will
return to normal operation.
NOTE:
Even if the transmission can be reset, we
recommend that you visit your authorized
dealer at your earliest possible conve-
nience. Your authorized dealer has diagnos-
tic equipment to determine if the problem
could recur. If the transmission cannot be
reset, authorized dealer service is required. Electronic Range Select (ERS) Operation
The Electronic Range Select (ERS) shift control
allows the driver to limit the highest available
gear when the shift lever is in the DRIVE
position. For example, if you shift the transmis-
sion into 3 (third gear), the transmission will
never shift above third gear, but will shift down
into second and first gears normally.
Use of ERS (or TOW/HAUL mode) also enables
an additional underdrive gear which is not nor-
mally used during through-gear accelerations.
This additional gear can improve vehicle perfor-
mance and cooling capability when towing a
trailer on certain grades. In ERS mode, gears 1
though 3 are underdrive gears, and ERS 4 is
direct drive. ERS 5 and 6 (Overdrive gears ) are
the same as the normal fourth and fifth gears.
You can switch between DRIVE and ERS mode at
any vehicle speed. When the shift lever is in the
DRIVE position, the transmission will operate
automatically, shifting between all available
gears. Tapping the shift lever to the left (-) will
activate ERS mode, display the current gear in
the instrument cluster, and maintain that gear as
the top available gear. Once in ERS mode, tap-
ping the shift lever to the left (-) or right (+) will
change the top available gear.
The instrument cluster display will show the
requested top gear limit, however the transmis-
sion will not downshift to the requested gear if
doing so would overspeed the engine. The
transmission will downshift once the vehicle
speed has slowed sufficiently.
To exit ERS mode, simply press and hold the
shift lever to the right (+) until “D” is once again
displayed in the shift lever position indicator in
the instrument cluster.
WARNING!
Do not downshift for additional engine brak-
ing on a slippery surface. The drive wheels
could lose their grip and the vehicle could
skid, causing a collision or personal injury.
NOTE:
To select the proper gear position for maxi-
mum deceleration (engine braking), simply
press and hold the shift lever to the left (-).
The transmission will shift to the range from
which the vehicle can best be slowed down.
235

Overdrive Operation
The automatic transmission includes an elec-
tronically controlled Overdrive (fourth and fifth
gears). The transmission will automatically shift
into Overdrive if the following conditions are
present:
•the shift lever is in the DRIVE position,
• the transmission fluid has reached an ad-
equate temperature,
• the engine coolant has reached an adequate
temperature,
• vehicle speed is sufficiently high,
• the driver is not heavily pressing the accel-
erator, and
•
the TOW/HAUL switch has not been activated.
When To Use TOW/HAUL Mode
When driving in hilly areas, towing a trailer,
carrying a heavy load, etc., and frequent trans-
mission shifting occurs, press the TOW/HAUL
switch to activate TOW/HAUL mode. This will
improve performance and reduce the potential
for transmission overheating or failure due to
excessive shifting. When operating in TOW/ HAUL mode, transmission upshifts are delayed,
and the transmission will automatically down-
shift (for engine braking) during steady braking
maneuvers.
The “TOW/HAUL Indicator Light” will illuminate
in the instrument cluster to indicate that TOW/
HAUL mode has been activated. Pressing the
switch a second time restores normal operation.
Normal operation is always the default at en-
gine start-up. If TOW/HAUL mode is desired,
the switch must be pressed each time the
engine is started.
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 calibrated
speeds. This may result in a slightly different
feeling or response during normal operation in
the upper gears. When the vehicle speed drops
or during some accelerations, the clutch auto-
matically disengages.
NOTE:
•
The torque converter clutch will not en-
gage, and the transmission will not shift
into the top overdrive gear, until the trans-
mission fluid and engine coolant are
warm [usually after 1 to 3 miles (2 to 5 km)
of driving]. Because top gear is disabled,
and engine speed is higher when the
torque converter clutch is not engaged, it
may seem as if the transmission is not
shifting properly when cold. This is nor-
mal. Using the Electronic Range Select
(ERS) shift control, when the transmis-
sion is sufficiently warm, will demon-
strate that the transmission is able to shift
into and out of Overdrive.
TOW/HAUL Switch
236

•If the vehicle has not been driven for
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 not
cause damage to the transmission. The
torque converter will refill within five sec-
onds after starting the engine.
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.
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, slip-
pery road surfaces only. Driving in the 4WD
LOW position on dry, hard-surfaced roads may
cause increased tire wear and damage to drive-
line 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 cir-
cumference 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 NEUTRAL (N) position without first
fully engaging the parking brake. The trans-
fer case NEUTRAL (N) 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.
237

Shift PositionsFor 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.
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.
Transfer Case Switch
238