clutch JEEP WRANGLER 2004 TJ / 2.G Owners Manual

STARTING PROCEDURES
Before starting your vehicle, adjust your seat, adjust both
inside and outside mirrors, and fasten your seat belts.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build up may
cause serious injury or death.
Manual Transmission
Apply the parking brake, place the gearshift control lever
in N (Neutral) and depress the clutch pedal before
starting vehicle. This vehicle is equipped with a clutch
interlocking ignition system. It will not start unless the
clutch pedal is pressed to the floor.
WARNING!
You or others around you could be injured if you
attempt to start the engine with a manual transmis-
sion in gear Ð your vehicle will move. Remember,
always push the clutch pedal in fully and shift into
N (Neutral) before attempting to start the engine.
Automatic Transmission
Start the engine with the selector lever in the N (Neutral)
or P (Park) position. Apply the brake before shifting to
any driving range.
Normal Starting
Normal starting of either a cold or a warm engine is
obtained without pumping or depressing the accelerator
pedal. Turn the key to the START position and release
when the engine starts. If the engine fails to start within
10 seconds, turn the key to the OFF position, wait 5
seconds, then repeat the normal starting procedure.
160 STARTING AND OPERATING

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.
²When ªrockingº a stuck vehicle by shifting between a
forward gear and reverse, do not spin wheels faster
than 15 mph (24 km/h), or drivetrain damage may
result.
²The manual transmission may be equipped with a
ªReverse Blockerº to prevent inadvertent shifts from
5th gear to Reverse. If you experience difficulty shift-
ing into ªReverseº, make sure that you are not inad-
vertently moving the shift lever toward 5th gear when
shifting into ªReverse.º
Recommended Manual Transmission Shifting
Speeds
The ªShift Indicator Lightº in the instrument cluster
reminds you when to shift to the next higher gear (4.0L
Only). The manufacturer recommends that you use the
SIL for normal driving. The desired shift speeds are listed
in the chart below.
Manual Transmission Shift Speeds in MPH (KM/H)
Engine Speeds 1 to 2 2 to 3 3 to 4 4 to 5
2.4L Accel. 15 (24) 25 (40) 40 (64) 45 (72)
Cruise 15 (24) 25 (40) 40 (64) 45 (72)
4.0L Accel. 14 (23) 23 (37) 36 (58) 44 (71)
Cruise 14 (23) 20 (32) 28 (45) 38 (61)
164 STARTING AND OPERATING

Clutch Interlocking Ignition System
Manual transmission vehicles are equipped with a clutch
interlock safety feature. With this feature engaged, you
must depress the clutch pedal to allow cranking of the
engine. To temporarily bypass this safety feature while
off-road driving, which will allow cranking the engine
without depressing the clutch, follow these steps:
1. Locate the instrument panel fuseblock behind the
glove compartment.
2. Put a 20 Amp fuse (optional) in the fuseblock cavity
(f20) marked as Transmission.
NOTE:A fuse is provided in fuseblock cavity (f19)
marked as Spare.
3. Be sure to re-engage the clutch interlock safety feature
by following these steps in reverse order when you are
finished off-road driving.
Automatic Transmission
Shifting from D (Drive) to P (Park) or R (Reverse) (or
from P or R to D) should be done only after the
accelerator pedal is released and the vehicle is stopped.
Be sure to keep your foot on the brake when moving the
shift lever between these gears.
STARTING AND OPERATING 165
5

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.
FOUR±WHEEL DRIVE OPERATION
(COMMAND-TRACŸ OR ROCK-TRACŸ) Ð IF
EQUIPPEDOperating Instructions/Precautions
The transfer case provides four mode positions Ð two
(rear) wheel drive high range, four wheel drive high
range, neutral, and four wheel drive low range.
This transfer case is intended to be driven in the two
wheel drive (2H) position for normal street and highway
conditions such as dry hard surfaced roads.
In the events when additional traction is required, the
transfer case 4H and 4L positions can be used to lock the
front and rear driveshafts together and force the front
and rear wheels to rotate at the same speed. This is
accomplished by simply moving the shift lever to these
positions. The 4H and 4L positions are intended for loose,
slippery road surfaces only. Driving in the 4H and 4L
positions on dry hard surfaced roads may cause in-
creased tire wear and damage to the driveline compo-
nents.
The 4WD indicator light, located in the instrument panel,
alerts the driver that the vehicle is in four wheel drive
and that the front and rear driveshafts are locked to-
gether. This light illuminates when the transfer case is
shifted to either the 4H or 4L positions.
170 STARTING AND OPERATING

4H Position
Four Wheel Drive High Range Ð Locks the front and rear
driveshafts together. Forces the front and rear wheels to
rotate at the same speed. Additional traction for loose,
slippery road surfaces.
N (Neutral) Position
Neutral Ð Disengages both the front and rear driveshafts
from the powertrain. To be used for flat towing behind
another vehicle. Refer to ªRecreational Towingº in Sec-
tion 5 of this manual.
4L Position
Four Wheel Drive Low Range Ð Locks the front and rear
driveshafts together. Forces the front and rear wheels to
rotate at the same speed. Additional traction and maxi-
mum pulling power for loose, slippery road surfaces
only. Do not exceed 25 mph (40 km/h).
Shifting Procedure
2H to 4H or 4H to 2H
Shifting between 2H and 4H 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, the transfer case will engage/
disengage faster if you momentarily release the accelera-
tor pedal after completing the shift. Apply a constant
force when shifting the transfer case lever.
4H to 4L or 4L to 4H
With the vehicle rolling at 2 to 3 mph (3 to 5 km/h), shift
an automatic transmission to N (Neutral) or depress the
clutch pedal on a manual transmission. While the vehicle
is coasting at 2 to 3 mph (3 to 5 km/h), shift the transfer
case lever firmly to the desired position. Do not pause in
transfer case N (Neutral).
NOTE:Pausing in transfer case N (Neutral) in vehicles
equipped with an automatic transmission may require
shutting the engine OFF to avoid gear clash while
completing the shift. If difficulty occurs, shift the auto-
matic transmission to N (Neutral), hold foot on brake,
and turn the engine OFF. Make shift to desired mode.
172 STARTING AND OPERATING

NOTE:Shifting into or out of 4L is possible with the
vehicle completely stopped, however, difficulty may oc-
cur due to the mating teeth not being properly aligned.
Several attempts may be required for clutch teeth align-
ment and shift completion to occur. The preferred
method is with the vehicle rolling at 2 to 3 mph (3 to 5
km/h). Avoid attempting to engage or disengage 4L with
the vehicle moving faster than 2 to 3 mph (3 to 5 km/h).
WARNING!
Failure to engage a position completely can cause
transfer case damage or loss of power and vehicle
control. You could have an injury accident. Do not
drive the vehicle unless the transfer case is fully
engaged.
TRAC-LOKŸ REAR AXLE
The Trac-LokŸ 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 differential
automatically proportions the usable torque by providing
more torque to the wheel that has traction.
Trac-LokŸ 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.
STARTING AND OPERATING 173
5

Don't shift to a lower gear than necessary to maintain
headway. Over-revving the engine can spin the wheels
and traction will be lost.
Do not downshift on icy or slippery roads because engine
braking may cause skidding and loss of control.
When driving on soft sand, reduce your tire pressure to
15 psi (103 kPa) minimum to allow greater tire surface
area. You must return the tires to normal air pressure
before driving on pavement or other hard surfaces.
NOTE:Reduced tire pressures below 15 psi (103 kPa)
may cause tire unseating and loss of air pressure.
Hill Climbing
Before climbing a steep hill,change transmission to a
lower gear and shift the transfer case to 4L (Low). Use
first gear and 4L (Low) for very steep hills.
If you stall or begin to lose headwaywhile climbing a
steep hill, allow your vehicle to come to a stop and
immediately apply the brake. Restart the engine and shift
to R (Reverse). Back up slowly down the hill allowing the
compression braking of the engine and transmission tohelp 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 or you lose headway 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 care-
fully straight down a hill in R (Reverse) gear. Never
back down a hill in N (Neutral) or with the clutch
pedal depressed, 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 headway by
turning the front wheels sharply left and right. This will
provide fresh ªbiteº into the surface and will usually
provide traction to complete the climb.
182 STARTING AND OPERATING

NOTE:Refer to ªRecommended Fluids, Lubricants,
and Genuine Partsº in Section 7 for axle differential
lubrication specifications for towing.
SNOW PLOW
Snow plowsshould notbe added to the front end of your
vehicle.
RECREATIONAL TOWING (BEHIND
MOTORHOME, ETC.)
CAUTION!
Internal damage to the transfer case will occur if a
front or rear wheel lift is used when recreational
towing.
NOTE:The transfer case must be shifted into N (Neu-
tral) for recreational towing.
Shifting Into Neutral (N)
Use the following procedure to prepare your vehicle for
recreational towing.
CAUTION!
It is necessary to follow these steps to be certain that
the transfer case is fully in N (Neutral) before
recreational towing to prevent damage to internal
parts.
1. Depress brake pedal.
2. Shift automatic transmission into N (Neutral) or de-
press clutch pedal on manual transmission.
3. Shift transfer case lever into N (Neutral).
4. Start engine.
5. Shift automatic transmission into D (Drive) or manual
transmission into gear.
STARTING AND OPERATING 205
5

6. Release brake pedal and ensure that there is no vehicle
movement.
7. Shut the engine off and place the ignition key into the
unlocked OFF position.
8. Shift automatic transmission into P (Park).
9. Apply parking brake.
10. Attach vehicle to the tow vehicle with tow bar.
11. Release parking brake.
CAUTION!
Damage to the transmission may occur if the trans-
mission is shifted into P (Park) with the transfer case
in N (Neutral) and the engine running. With the
transfer case in N (Neutral) ensure that the engine is
off prior to shifting the transmission into P (Park)
(refer to steps7±8above).
Shifting Out Of Neutral (N)
Use the following procedure to prepare your vehicle for
normal usage.
1. Shift automatic transmission into N (Neutral) or de-
press clutch pedal on manual transmission.
2. Shift transfer case lever into desired position.
3. Shift automatic transmission into D (Drive) or release
clutch on manual transmissions.
NOTE:When shifting out of transfer case N (Neutral)
on automatic transmission equipped vehicles, turning
the engine off may be required to avoid gear clash.
206 STARTING AND OPERATING

NWindshield Washers...................238
NExhaust System......................238
NCooling System.......................239
NHoses And Vacuum/Vapor Harnesses.......242
NBrake System........................243
NAutomatic Transmission................245
NHydraulic Clutch Fluid Ð
Manual Transmission..................246
NManual Transmission..................246
NTransfer Case........................247
NFront/Rear Axle Fluid..................248
NAppearance Care And Protection
From Corrosion......................248mFuse Panel...........................254
NInterior Fuses........................254
NUnderhood Fuses
(Power Distribution Center)..............256
mVehicle Storage........................256
mReplacement Bulbs Ð If Equipped.........257
mFluid Capacities.......................258
mRecommended Fluids, Lubricants And
Genuine Parts
.........................259
NEngine.............................259
NChassis............................260
222 MAINTAINING YOUR VEHICLE