2008 JEEP LIBERTY engine

The ªTOW/HAUL Indicator Lightº 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 ªTOW/HAULº 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
added to the automatic transmission of this vehicle. A
clutch within the torque converter engages automatically
at calibrated speeds. This may result in a slightly differ-
ent feeling or response during normal operation in high
gear. When the vehicle speed drops or during accelera-
tion, the clutch automatically and smoothly disengages.
Transmission Limp Home Mode
The transmission is monitored for abnormal conditions.
If a condition is detected that could cause damage, the
transmission shifts automatically into second gear if the
vehicle speed is appropriate. If not, it will wait until the
conditions are appropriate and then it will shift into
second gear. The transmission will then remain in second
gear despite the forward gear selected. ªPº (Park), ªRº
(Reverse), and ªNº (Neutral) will continue to operate.
Tow/Haul Button
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5

A Reset feature allows the vehicle to be driven to a dealer
for service without damaging the transmission. To reset
the transmission, perform the following procedure:
1. Stop the vehicle.
2. Move the selector lever to the ªPº (Park) position.
3. Turn off the engine; be sure to turn the key to the
LOCK position.
4. Wait approximately 10 seconds, and then restart the
engine.
5. Move the selector lever to the desired gear range.
If the problem is no longer detected, the transmission will
return to normal operation. If the problem persists, ªPº
(Park), ªRº (Reverse), and ªNº (Neutral) will continue to
operate. Only Second gear range will operate in the ªDº
(Drive) position. Have the transmission checked at your
authorized dealer as soon as possible.MANUAL TRANSMISSION Ð IF EQUIPPED
Clutch Interlocking Ignition System
Vehicles equipped with a manual transmission are
equipped with a clutch interlock safety feature. The
clutch pedal must be fully depressed to allow cranking of
the engine.
To enhance off-road performance, 4-wheel drive models
equipped with a manual transmission will start with or
without pressing the clutch pedal when in 4-wheel drive
low range. The 4 LOW indicator light will illuminate
when the transfer case is in 4-wheel drive low range.
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WARNING!
When parking your vehicle, always leave a manual
transmission in first gear and apply the parking
brake fully to guard against vehicle movement and
possible injury or damage. Never use any gear as a
substitute for the parking brake.
CAUTION!
To drive as safely as possible and to prolong the life
of your manual transmission, follow these tips:
²Before shifting from a forward gear into reverse, or
from reverse to a forward gear, stop vehicle com-
pletely. Otherwise, accelerated transmission wear may
result.
²Do not operate at sustained high engine or road
speeds in lower gears. Engine damage may result.
²Do not downshift into a low gear while traveling at too
high a speed for that gear. Engine, clutch, or transmis-
sion damage may result.
²Do not rest your foot on the clutch pedal. This causes
heat buildup and damages the clutch.
²When you slow down or go up a grade, downshift as
speed requires or the engine may overheat.
²Never hold the vehicle stopped on a hill by using the
clutch pedal. The clutch may be damaged.
²During cold weather, you may experience increased
effort in shifting until the transmission fluid warms
up. This is normal.
²Push in the clutch pedal completely when shifting.
Otherwise, transmission or clutch damage may result.
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CAUTION!
Failure to follow the recommended downshifting
speeds may cause the engine to over speed and/or
damage the clutch disc even if the clutch pedal is
depressed.
FOUR-WHEEL DRIVE OPERATION
MP1522 Command-TracTTransfer Case Ð If
Equipped
Operating Information & Precautions
The Command-Tracttransfer case provides four posi-
tions:
²2 (rear) wheel drive high range.
²4-wheel drive high range.
²Neutral.
²4-wheel drive low range.
This transfer case is intended to be driven in the 2-wheel
drive position (2WD) for normal street and highway
conditions such as dry hard surfaced roads.
When additional traction is required, select the transfer
case 4WD Lock position or 4WD Low position. This
position locks the front driveshaft and rear driveshaft
together and forces the front and rear wheels to rotate at
the same speed.
Use the transfer case Neutral (N) position for recreational
towing only. Refer to ªRecreational Towingº in this
section for specific procedures on shifting into and out of
Neutral (N).
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CAUTION!
²Do not attempt to make a shift while only the front wheels
or rear wheels are spinning. The MP1522 Command-Tract
transfer case is not equipped with a synchronizer and
therefore the speed of the front driveshaft and rear drive-
shaft must be equal for the shift to take place. Shifting
while only the front wheels or rear wheels are spinning can
cause damage to the transfer case.
²The 4WD Lock position and 4WD Low position are in-
tended for loose or slippery road surfaces only. Driving in
these positions on dry hard surfaced roads may cause
increased tire wear and damage to the driveline compo-
nents.
²When operating your vehicle in 4WD LOW, the engine
speed is approximately three times that of the 2WD posi-
tion or 4WD LOCK position at a given road speed. Take
care not to over-speed the engine and do not exceed 25 mph
(40 km/h).
²Proper operation of 4-wheel drive vehicles depends on tires
of equal size, type, and circumference on each wheel. Any
difference in tire size can cause damage to the transfer case.
WARNING!
²You 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 transfer case Neutral (N)
position disengages both the front driveshaft and
rear driveshaft from the powertrain and it will
allow the vehicle to move despite the transmission
position. The parking brake should always be
applied when the driver is not in the vehicle.
²Always engage the parking brake when powering
down the vehicle if the ªSERV 4WDº light is
illuminated. Not engaging the parking brake may
allow the vehicle to roll, which may cause personal
injury.
²Since 4-wheel drive provides improved traction,
there is a tendency to exceed safe turning and
stopping speeds. Do not go faster than road condi-
tions permit. You or others could be injured.
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Shift Positions
The electronic transfer case switch is located on the center
console next to the gear selector lever.
2WD
Rear Wheel Drive High Range - Normal street and
highway driving. Dry hard surfaced roads.4WD Lock
4-Wheel-Drive High Range - Locks the front driveshaft
and rear driveshaft together and forces the front and rear
wheels to rotate at the same speed. Additional traction
for loose or slippery road surfaces only.
4WD Low
4-Wheel-Drive Low Range - Low speed 4-wheel drive
that locks the front driveshaft and rear driveshaft to-
gether and forces the front and rear wheels to rotate at the
same speed. Additional traction and maximum pulling
power for loose or slippery road surfaces only. Do not
exceed 25 mph (40 km/h). This position allows engine
starting without depressing the clutch pedal on vehicles
equipped with a manual transmission. Refer to ªClutch
Interlocking Ignition Systemº under ªManual Transmis-
sionº or to ªStarting Proceduresº in this section for
details.
4WD Control Switch
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N
Neutral - Disengages both the front driveshaft and rear
driveshaft from the powertrain. To be used for flat
towing behind another vehicle. Refer to ªRecreational
Towingº in this section for more information.
Transfer Case Position Indicator Lights
The 4WD indicator lights are located in the instrument
cluster. The ªNº (Neutral) indicator light is located on the
4WD Control Switch. If there is no indicator light on or
flashing, the transfer case position is 2-wheel drive
(2WD). If the indicator light is on, the desired position
(4WD LOCK, 4WD LOW, or NEUTRAL) has been ob-
tained.
If One or More Shift Requirements are not met:
²An indicator light will flash.
²The transfer casewill notshift.NOTE:The ªSERV 4WDº warning light monitors the
electric shift 4WD system. If this light remains on after
engine start up, or it illuminates during driving, it means
that the 4WD system is not functioning properly and that
service is required.
Shifting Procedures
NOTE:If any of the requirements to select a new
transfer case position have not been met, the transfer case
will not shift, the indicator light for the previous position
will remain ON, and the newly selected position indica-
tor light will continue to flash until all the requirements
for the selected position have been met. To retry a shift,
move the 4WD Control Switch back to the original
position, make certain all shift requirements have been
met, wait five (5) seconds, and try the shift again.
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5

2WD to 4WD Lock
Move the 4WD Control Switch to the desired position.
Shifts between 2WD and 4WD LOCK can be done with
the vehicle stopped or in motion. With the vehicle in
motion, the transfer case will engage / disengage faster if
you momentarily release the accelerator pedal after mov-
ing the 4WD Control Switch. If the vehicle is stopped, the
ignition switch must be in the ON position with the
engine either OFF or RUNNING. This shift cannot be
completed if the ignition switch is in the ACC position.
NOTE:
²The 4-wheel drive system will not allow shifts be-
tween 2WD and 4WD LOCK if the rear wheels are
spinning (no traction). In this situation, the selected
position indicator light will flash and the original
position indicator light will remain ON. At this time,reduce speed and stop spinning the wheels to com-
plete the shift. There may be a delay up to 10 seconds
for the shift to complete after the wheels have stopped
spinning.
²Delayed shifting out of 4WD LOCK may be experi-
enced due to uneven tire wear, low tire pressure, or
excessive loading.
4WD Lock to 4WD Low
When shifting into or out of 4WD LOW, some gear noise
may be heard. This noise is normal and is not detrimental
to the vehicle or its occupants
Shifting can be performed with the vehicle rolling 2-3
mph (3-5 km/h) using the ªPreferred Procedureº or
completely stopped using the ªAlternate Procedure.º
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