wheel torque JEEP LIBERTY 2005 KJ / 1.G Owners Manual

NOTE:If the vehicle is started in cold outside tempera-
tures, shifts into Overdrive may be delayed. Normal
Overdrive and shifting operation will resume when the
temperature of the transmission reaches the appropriate
temperature. Refer to the “Note” under “Torque Con-
verter Clutch” later in this section.
If the transmission temperature gets too hot, the trans-
mission may downshift out of Overdrive or engage
overdrive at higher vehicle speeds until the transmission
cools down. After cooldown, Overdrive will resume
normal operation.
2 (Second)
For moderate grades and to assist braking on dry pave-
ment or in mud and snow. Begins at a stop in low gear
with automatic upshift to 2nd gear. Will not shift to 3rd.1 (First)
For hard pulling at low speeds in mud, sand, snow, or on
steep grades. Begins and stays in low gear with no upshift.
Provides engine compression braking at low speeds.
CAUTION!
•Never press on the accelerator pedal with the
engine running, vehicle in gear, and the brakes
applied. Always apply the brakes when stopped
on a incline. Failure to follow these instructions
can cause overheating and damage to the trans-
mission.
•When “rocking” a stuck vehicle by moving be-
tween “First” and R (Reverse), do not spin the
wheels faster than 15 mph (24 km/h), or drivetrain
damage may result.
234 STARTING AND OPERATING

normal condition and will not cause damage to the
transmission. The torque converter will refill within 5
seconds of shifting from P (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 “First” and R (Reverse),
while applying slight pressure to the accelerator.
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
selector in N (Neutral) for at least one minute after every
five rocking-motion cycles. This will minimize overheat-
ing 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 R (Reverse), do not spin the wheels faster
than 15 mph (24 km/h), or drivetrain damage may
result.
FOUR-WHEEL DRIVE OPERATION
Command-TracOperating
Information/Precautions
The Command-Tractransfer case provides 4 mode
positions-2(rear) wheel drive high range, 4-wheel drive
high range, neutral, and 4-wheel drive low range.
This transfer case is intended to be driven in the 2-wheel
drive position (2H) for normal street and highway con-
ditions such as dry hard surfaced roads.
236 STARTING AND OPERATING

N
Neutral - Disengages both the front and rear driveshafts
from the powertrain. To be used for flat towing behind
another vehicle. Refer to “Recreational Towing” in Sec-
tion 5 for more information.
4LO
Part Time 4–Wheel Drive Low Range - Low speed
4–wheel drive. Locks the transfer case inter-axle differ-
ential. Forces the front and rear wheels to rotate at the
same speed. Additional traction and maximum pulling
power for loose, slippery road surfaces only. Do not
exceed 25 mph (40 km/h).
Shifting Procedure
2WDto4PARTTIMEor4PARTTIMEto2WD
Shifting between 2WD and 4 PART TIME can be made
with the vehicle stopped or in motion. If the vehicle is in
motion, shifts can be made up to 55 mph (88 km/h). With
the vehicle in motion two momentary releases of theaccelerator pedal may be required after shifting. This will
induce a torque interrupt and allow full engagement of
the newly selected position. With the vehicle stationary it
may be necessary to shift the automatic transmission
from D (Drive) to R (Reverse) and back to D (Drive) after
shifting. This will allow full engagement of the newly
selected position. Apply a constant force when shifting
the transfer case lever.
4 PART TIME to 4 FULL TIME or 4 FULL TIME to
4 PART TIME
Shifting between 4 PART TIME and 4 FULL TIME can be
made with the vehicle stopped or in motion. If the vehicle
is in motion shifts can be made up to 55 mph (88 km/h).
With the vehicle in motion two momentary releases of the
accelerator pedal may be required after shifting. This will
induce a torque interrupt and allow full engagement of
the newly selected position. With the vehicle stationary it
may be necessary to shift the automatic transmission
from D (Drive) to R (Reverse) and back to D (Drive) after
STARTING AND OPERATING 243
5

TRAC-LOK™ REAR AXLE — IF EQUIPPED
The optional Trac-Lok™ rear axle provides a constant
driving force to both rear wheels and reduces wheel spin
caused by the loss of traction at one driving wheel. If
traction differs between the two rear wheels, the differ-
ential automatically proportions the usable torque by
providing more torque to the wheel that has traction.
Trac-Lok™ is especially helpful during slippery driving
conditions. With both rear wheels on a slippery surface, a
slight application of the accelerator will supply maxi-
mum traction. When starting with only one rear wheel on
an excessively slippery surface, slight application of the
parking brake may be necessary to gain maximum trac-
tion.WARNING!
On vehicles equipped with a limited-slip differen-
tial, never run the engine with one rear wheel off the
ground. The vehicle may drive through the rear
wheel remaining on the ground and cause you to
lose control of your vehicle.
PARKING BRAKE
To set the parking brake, pull the lever up as firmly as
possible. When the parking brake is applied with the
ignition ON, the “Brake Warning Light” in the instru-
ment cluster will light.
NOTE:The instrument cluster “Brake Warning Light”
indicates only that the parking brake is applied. You must
be sure the parking brake is fully applied before leaving
the vehicle.
STARTING AND OPERATING 245
5

After Driving Off-Road
Off-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, steering, suspension, and
exhaust system for damage.
•Check threaded fasteners for looseness, particularly on
the chassis, drivetrain components, steering, and sus-
pension. Retighten 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, water, or
similar dirty conditions, have brake rotors, wheels,
brake linings, 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 an accident. 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. Impacted material can cause a
wheel imbalance and freeing the wheels of it will
correct the situation.
STARTING AND OPERATING 253
5

WARNING!
Raising the vehicle higher than necessary can make
the vehicle less stable and cause an accident. It could
slip off the jack and hurt someone near it. Raise the
vehicle only enough to remove the tire.
6. Remove the lug nuts and wheel.
7. Position the spare wheel/tire on the vehicle and install
lug nuts with cone-shaped end toward wheel. Lightly
tighten the nuts. To avoid the risk of forcing the vehicle
off the jack, do not tighten the nuts fully until the vehicle
has been lowered.
8. Lower the vehicle by turning the jack screw to the left,
and remove the jack and wheel blocks.
9. Finish tightening the lug nuts. Push down on the
wrench while tightening for increased leverage. Alternatenuts until each nut has been tightened twice. Correct
wheel nut tightness is 130 N·m (95 ft. lbs). If in doubt
about the correct tightness, have them checked with a
torque wrench by your authorized dealer or at a service
station.
10. Lower the jack to it’s fully closed position.WARNING!
A loose tire or jack, thrown forward in a collision or
hard stop could endanger the occupants of the ve-
hicle. Always stow the jack parts and the spare tire in
the places provided.
11. Secure the tire, jack, and tools in their proper loca-
tions.
298 WHAT TO DO IN EMERGENCIES

Timing Belt............................ 319
Tire and Loading Information Placard......258,259
Tire Identification Number (TIN)............. 257
Tire Markings.......................... 254
Tire Safety Information.................... 254
Tires ................................. 262
Air Pressure.......................... 263
Alignment and Balance.................. 267
Chains.............................. 274
Changing............................ 294
General Information.................... 262
High Speed.......................... 264
Inflation Pressures..................... 263
Jacking............................. 294
Load Capacity.....................258,259
Pressure Monitor System................. 268
Radial.............................. 265
Replacement......................... 266
Rotation............................. 275Safety............................75,254
Sizes............................... 255
Spare Tire........................... 295
Spinning............................ 265
Tread Wear Indicators................... 266
Torque Converter Clutch.................. 235
Tow Hooks, Emergency................... 301
Towing............................283,302
Disabled Vehicle....................... 302
Recreational.......................... 287
Trailering............................ 283
Trac-Lok Rear Axle...................... 245
Trailer Towing.......................... 283
Minimum Requirements................. 286
Transfer Case........................236,336
Four-Wheel-Drive Operation.............. 236
Maintenance.......................... 336
Transmission
Automatic........................230,333
INDEX 415
10