1995 JEEP YJ torque

AW-4 TORQUE SPECIFICATIONS
NP231/NP242 TORQUE SPECIFICATIONS
21 - 344 TRANSMISSION/TRANSFER CASE SPECIFICATIONSJ

WHEELS
GENERAL INFORMATION
Original equipment wheels are designed for the
specified Maximum Vehicle Capacity.
All models use steel or cast aluminum drop center
wheels. The safety rim wheel (Fig. 1) has raised sec-
tions between the rim flanges and the rim well.
Initial inflation of the tire forces the bead over
these raised sections. In case of tire failure, the
raised sections hold the tire in position on the wheel
until the vehicle can be brought to a safe stop.
Cast aluminum wheels require special balance
weights and alignment equipment.
WHEEL INSTALLATION
The wheel studs and nuts are designed for specific
applications. They must be replaced with equivalent
parts. Do not use replacement parts of lesser quality
or a substitute design. All aluminum and some steel
wheels have wheel stud nuts which feature an en-
larged nose. This enlarged nose is necessary to en-
sure proper retention of the aluminum wheels.
Before installing the wheel, be sure to remove any
build up of corrosion on the wheel mounting surfaces.
Ensure wheels are installed with good metal-to-metal
contact. Improper installation could cause loosening
of wheel nuts. This could affect the safety and han-
dling of your vehicle.
To install the wheel, first position it properly on
the mounting surface. All wheel nuts should then be
tightened just snug. Gradually tighten them in se-
quence to 129 Nzm (95 ft. lbs.) torque (Fig. 2).Never
use oil or grease on studs or nuts.
WHEEL REPLACEMENT
Wheels must be replaced if they have:²Excessive runout
²Bent or dented
²Leak air through welds
²Have damaged bolt holes
Wheel repairs employing hammering, heating, or
welding are not allowed.
Original equipment wheels are available through
your dealer. Replacement wheels from any other
source should be equivalent in:
²Load carrying capacity
²Diameter
²Width
²Offset
²Mounting configuration
Failure to use equivalent replacement wheels may
affect the safety and handling of your vehicle. Re-
placement withusedwheels is not recommended.
Their service history may have included severe treat-
ment.
Refer to the Specifications Chart for informa-
tion regarding above requirements.
WHEEL ORNAMENTATION
WARNING: HANDLE ALL WHEEL ORNAMENTATION
WITH EXTREME CARE DURING REMOVAL AND IN-
STALLATION. SHARP EDGES ON THE COVERS OR
CAPS CAN CAUSE PERSONAL INJURY.
TIRE AND WHEEL BALANCE
It is recommended that a two plane dynamic bal-
ancer be used when a wheel and tire assembly re-
quire balancing. Static should be used only when a
two plane balancer is not available.
For static imbalance, find location of heavy spot
causing imbalance. Counter balance wheel directly
Fig. 1 Wheel Safety Rim
Fig. 2 Lug Nut Tightening Pattern
22 - 6 WHEELS AND TIRESJ

Drive vehicle a short distance to eliminate tire flat
spotting from a parked position.
Make sure all wheel nuts are properly torqued.
Relocate wheel on the mounting, two studs over
from the original position.
Re-tighten wheel nuts until all are properly
torqued, to eliminate brake distortion.
Check radial runout. If still excessive, mark tire
sidewall, wheel, and stud at point of maximum
runout and proceed to Method 2.
METHOD 2 (RELOCATE TIRE ON WHEEL)
Rotating tire on wheel is particularly effective
when there is runout in both tire and wheel.Remove tire from wheel and re-mount wheel on
hub in former position.
Check wheel radial runout (Fig. 9).
²STEEL WHEELS: Radial runout 0.040 in., Lateral
runout 0.045 in.
²ALUMINUM WHEELS: Radial runout 0.030 in.,
Lateral runout 0.035 in.
If point of greatest runout is near original chalk
mark, remount tire 180 degrees. Recheck runout.
Fig. 8 Checking Tire Runout
Fig. 9 Checking Wheel Runout
JWHEELS AND TIRES 22 - 9

VEHICLE VIBRATION
Vehicle vibration can be caused by:
²Tire/wheel unbalance or excessive runout
²Defective tires with extreme tread wear
²Nylon overlay flat spots (performance tires only)
²Incorrect wheel bearing adjustment (if applicable)
²Loose or worn suspension/steering components
²Certain tire tread patterns
²Incorrect drive shaft angles or excessive drive
shaft/yoke runout
²Defective or worn U-joints
²Excessive brake rotor or drum runout
²Loose engine or transmission supports/mounts
²And by engine operated accessories
Refer to the appropriate Groups in this man-
ual for additional information.
VIBRATION TYPES
There are two types of vehicle vibration:
²Mechanical
²Audible.
Mechanical vehicle vibration can be felt through
the seats, floor pan and/or steering wheel.
Audible vehicle vibration is heard above normal
background noise. The sound can be a droning or
drumming noise.
Vibrations are sensitive to change in engine torque,
vehicle speed or engine speed.
ENGINE TORQUE SENSITIVE VIBRATION
This vibration can be increased or decreased by:
²Accelerating
²Decelerating
²Coasting
²Maintaining a constant vehicle speed
VEHICLE SPEED SENSITIVE VIBRATION
This vibration condition always occurs at the same
vehicle speed regardless of the engine torque or en-
gine speed.
ENGINE SPEED (RPM) SENSITIVE VIBRATION
This vibration occurs at varying engine speeds. It
can be isolated by increasing or decreasing the en-
gine speed with the transmission in NEUTRAL posi-
tion.
VIBRATION DIAGNOSIS
A vibration diagnosis should always begin with a
10 mile (16 km) trip (to warm the vehicle and tires).
Then a road test to identify the vibration. Corrective
action should not be attempted until the vibration
type has been identified via a road test.
During the road test, drive the vehicle on a smooth
surface. If vibration exists, note and record the fol-
lowing information:²Identify the vehicle speed range when the vibra-
tion occurs
²Identify the type of vibration
²Identify the vibration sensitivity
²Determine if the vibration is affected by changes
in vehicle speed, engine speed and engine torque.
When the vibration has been identified, refer to the
Vibration Diagnosis chart for causes. Consider cor-
recting only those causes coded in the chart that are
related to the vibration condition.
Refer to the following cause codes and descriptions
for explanations when referring to the chart.
TRRÐTire and Wheel Radial Runout:Vehicle
speed sensitive, mechanical vibration. The runout
will not cause vibration below 20 mph (32 km/h).
WHÐWheel Hop:Vehicle speed sensitive, me-
chanical vibration. The wheel hop generates rapid
up-down movement in the steering wheel. The vibra-
tion is most noticeable in the 20 - 40 mph (32 - 64
km/h) range. The wheel hop will not cause vibration
below 20 mph (32 km/h). Wheel hop is caused by a
tire/wheel that has a radial runout of more than
0.045 of-an-inch (1.14 mm). If wheel runout is accept-
able and combined runout cannot be reduced by re-
positioning the tire on wheel, replace tire.
TBÐTire/Wheel Balance:Vehicle speed sensitive,
mechanical vibration. Static tire/wheel unbalance
will not cause vibration below 30 mph (46 km/h). Dy-
namic tire/wheel unbalance will not cause vibration
below 40 mph (64 km/h).
TLRÐTire/Wheel Lateral runout:Vehicle speed
sensitive, mechanical vibration. The runout will not
cause vibration below 50 - 55 mph (80 - 88 km/h). Ex-
cessive lateral runout will also cause front-end
shimmy.
TWÐTire Wear:Vehicle speed sensitive, audible
vibration. Abnormal tire wear causes small vibration
in the 30 - 55 mph (88 km/h) range. This will pro-
duce a whine noise at high speed. The whine will
change to a growl noise when the speed is reduced.
WÐTire Waddle:Vehicle speed sensitive, mechan-
ical vibration. Irregular tire uniformity can cause
side-to-side motion during speeds up to 15 mph (24
km/h). If the motion is excessive, identify the defec-
tive tire and replace it.
UAJÐUniversal Joint (Drive Shaft) Angles:
Torque/vehicle speed sensitive, mechanical/audible vi-
bration. Incorrect drive shaft angles cause mechani-
cal vibration below 20 mph (32 km/h) and in the 70
mph (112 km/h) range. The incorrect angles can also
produce an audible vibration in the 20 - 50 mph (32 -
80 km/h) range. Caster adjustment could be required
to correct the angles.
UJÐUniversal Joints:Engine torque/vehicle
speed sensitive, mechanical/audible vibration. If the
22 - 10 WHEELS AND TIRESJ

U-joint is worn it will cause vibration with almost
any vehicle speed/engine torque condition.
DSYÐDrive Shaft and Yokes:Vehicle speed sen-
sitive, mechanical/audible vibration. The condition
will not cause vibration below 35 mph (56 km/h). Ex-
cessive runout, unbalance or dents and bends in the
shaft will cause the vibration. Identify the actual
cause and repair/replace as necessary.
WBÐWheel Bearings:Vehicle speed sensitive,
mechanical/audible vibration. Loose wheel bearings
cause shimmy-like vibration at 35 mph (56 km/h)
and above. Worn bearings will also produce a growl
noise at low vehicle speed and a whine noise at high
vehicle speed. The wheel bearings must be adjusted
or replaced, as applicable.
ANÐAxle Noise:Engine torque/vehicle speed sen-
sitive, mechanical/audible vibration. The axle will not
cause mechanical vibration unless the axle shaft is
bent. Worn or damaged axle pinion shaft or differen-
tial gears and bearings will cause noise. Replace the
defective component(s) as necessary.
SSCÐSuspension and Steering Components:
Vehicle speed sensitive, mechanical vibration. Worn
suspension/steering components can cause mechani-
cal vibration at speeds above 20 mph (32 km/h).
Identify and repair or replace the defective compo-
nent(s).EAÐEngine Driven Accessories:Engine speed
sensitive, mechanical/audible vibration. Vibration can
be caused by loose or broken A/C compressor, PS
pump, water pump, generator or brackets, etc. Usu-
ally more noticeable when the transmission is shifted
into the NEUTRAL position and the engine speed
(rpm) increased. Inspect the engine driven accesso-
ries in the engine compartment. Repair/replace as
necessary.
ADBÐAccessory Drive Belts:Engine speed sen-
sitive, audible vibration. Worn drive belts can cause a
vibration that produces either a droning, fluttering or
rumbling noise. Inspect the drive belt(s) and tighten/
replace as necessary.
DEMÐDamaged Engine or Transmission Sup-
port Mounts:Engine speed sensitive, mechanical/
audible vibration. If a support mount is worn, noise
or vibration will occur. Inspect the support mounts
and repair/replace as necessary.
ESÐExhaust System:Engine speed sensitive,
mechanical/audible vibration. If loose exhaust compo-
nents contact the vehicle body they will cause noise
and vibration. Inspect the exhaust system for loose,
broken and mis-aligned components and repair/re-
place as necessary.
VIBRATION DIAGNOSIS
JWHEELS AND TIRES 22 - 11

(6) Remove the nuts that attach the grille opening
panel (GOP) to the front fenders (Fig. 5).
(7) Remove the screws that attach the grille open-
ing panel (GOP) support bracket to the front sill
crossmember (Fig. 6).
(8) Pull the grille opening panel (GOP) forward
and disconnect the clips and all the front lamp har-
ness connectors (Fig. 7).
(9) Remove the grille opening panel (GOP) from
the vehicle.
(10) If necessary, remove the air inlet baffles from
GOP (Fig. 8).
INSTALLATION
(1) Place the grille opening panel (GOP) on bumper
and connect all front lamp wire harness connectors.
(2) Position the grille opening panel (GOP) on the
vehicle and install the side and upper nuts. Tighten
nuts to 7 Nzm (58 in-lbs) torque.
(3) Install the screw to attach grille opening panel
(GOP) to the crossmember support bracket. Tighten
the screw to 1 Nzm (11 in-lbs) torque.(4) Install headlamps and park/turn signal lamps
in GOP.
(5) Install the headlamp bezels on the GOP.
Tighten the screws to 1 Nzm (13 in-lbs) torque.
(6) Install the side marker lenses and screws on
the grille opening panel (GOP). Tighten the screws to
1Nzm (13 in-lbs) torque.
(7) Install the grille on the GOP. Tighten screws to
1Nzm (13 in-lbs) torque.
(8) Adjust the headlamp aim, if necessary. Refer to
the headlamp beam adjustment procedure within
Group 8L.
Fig. 5 GOP Attaching Nuts At Front Fender
Fig. 6 Crossmember-to-GOP Support Bracket
Fig. 7 Front Lamp Wire Harness Connectors
Fig. 8 GOP Air Inlet Baffles
JEXTERIOR COMPONENTSÐXJ 23 - 5

INSTALLATION
(1) If removed, install the horns, baffle braces and
the wire harnesses on the baffles (Fig. 11).
(2) Position the radiator and the radiator support
crossmember at the front of vehicle (Fig. 10). Install
and tighten screws to 9 Nzm (76 in-lbs) torque.
(3) For 2.5L engines, install the power steering
pump reservoir on the left filler panel (Fig. 9).
(4) Install the grille opening panel (GOP).
HOODÐXJ
The hood service procedures included in this sec-
tion include:
²Hood removal and installation.
²Hood adjustment.
²HingeÐlatchÐstriker service (Fig. 12).
²Latch release cable service.
JEXTERIOR COMPONENTSÐXJ 23 - 7

HOOD REMOVAL
(1) Raise hood.
(2) Disconnect the underhood lamp wire harness
connector, if equipped (Fig. 13).
(3) Drill out and remove the rivets that attach the
hood release cable bellcrank to the hood (Fig. 14).
(4) Disconnect the bellcrank from the latch con-
necting rod and the release cable. Remove the
bellcrank from the hood.
(5) Remove the latch release cable clips and re-
move the cable from the hood (Fig. 12).
(6) Remove the screws that attach the latches to
the hood (Fig. 15).
(7) Disconnect the latches from the hood and latch
connecting rod. Remove the latches from the hood.
(8) Remove the nuts that attach the safety latch to
the hood. Remove the safety latch from the hood.
(9) Remove the clips and latch connecting rod from
the hood.
(10) Mark the location of hood, the hinges and the
hinge shims for installation (Fig. 16).(11) Remove the screws that attach the hinges to
the hood. Remove the hood from the vehicle with the
aid of a helper.
(12) Remove the insulation panel from the hood
(Fig. 17).
HOOD INSTALLATION
(1) Install the insulation panel on the hood.
(2) Position the hood on the shims and hinges; fin-
ger-tighten the hinge bolts.
(3) Align the hinges and shims with the reference
marks. Tighten the hinge bolts to 30 Nzm (22 ft-lbs)
torque.
(4) Connect the latch release cable and latch con-
necting rod to the bellcrank.
(5) Position the bellcrank on the hood and install
the rivets.
Fig. 13 Underhood Lamp
Fig. 14 Hood Release Cable Bellcrank
Fig. 15 Hood Latch & Safety Latch
Fig. 16 Hood Hinges and Support Rod
JEXTERIOR COMPONENTSÐXJ 23 - 9