1994 JEEP CHEROKEE 4WD

LUBRICATION AND MAINTENANCE
CONTENTS
page page
CHASSIS AND BODY COMPONENTS....... 30
DRIVETRAIN........................... 22
ENGINE MAINTENANCE.................. 13GENERAL INFORMATION.................. 1
JUMP STARTING, HOISTING AND TOWING . . 7
MAINTENANCE SCHEDULES............... 5
GENERAL INFORMATION
INDEX
page page
Classification of Lubricants.................. 2
Components Requiring No Lubrication.......... 3
Fluid Capacities.......................... 4
Fuel Requirements........................ 2Introduction.............................. 1
Recommended Lubricant and Replacement Parts . 3
Routine Service........................... 2
INTRODUCTION
Jeeptlubrication and maintenance is divided into
required and recommended service tasks.
The recommendations and procedures listed in this
group are intended for JeeptDealer Service Personnel.
Because conditions vary, it is necessary to schedule
service tasks according to a time interval as well as a
distance interval.
It is the owner's responsibility to have vehicle ser-
viced. Owner is to pay for labor and necessary parts
that are not covered by the warranty.
Additional lubrication and maintenance informa-
tion is listed in the Owner's Manual, which is in-
cluded with the vehicle.
SEVERE DRIVING CONDITIONS
When a vehicle is subjected to a severe driving con-
dition, time between recommended maintenance
should be decreased.
Refer to Engine Maintenance for the engine oil and
filter maintenance interval when involved with a se-
vere driving condition.
A severe driving condition is defined as either:
²frequent short trip driving less than 24 km (15
miles);
²frequent driving in a dusty environment;
²trailer towing;
²extensive engine idling;
²sustained high-speed operation;
²desert operation;
²frequent starting and stopping;²cold-climate operation;
²off-road driving; or
²commercial service.
To service a Jeeptvehicle for a severe driving con-
dition, change all the lubricating fluids and lubricate:
²the body components,
²all the driveline coupling joints, and
²the steering linkage
more often than for a normal driving condition to
prevent excessive wear of the components.
DUSTY AREAS
Driving in an area with dust-filled air increases the
risk of particles entering the engine and crankcase.
With this type of severe driving condition, attention
should be given to the engine and crankcase compo-
nents.
OFF-ROAD (4WD) OPERATION
After completion of off-road (4WD) operation, the
underside of the vehicle should be thoroughly in-
spected. Examine threaded fasteners for looseness.
HARSH SURFACE ENVIRONMENTS
After vehicle operation in a harsh surface environ-
ment, the following components should be inspected
and cleaned as soon as possible:
²brake drums,
²brake linings,
²front wheel bearings (2WD vehicles only), and
²axle coupling joints.
This will prevent wear and/or unpredictable brake
action.
JLUBRICATION AND MAINTENANCE 0 - 1

²if the vehicle is damaged, secure the loose and pro-
truding parts;
²always use a safety chain system that is indepen-
dent of the lifting and towing equipment;
²do not allow any of the towing equipment to con-
tact the disabled vehicle's fuel tank;
²do not allow anyone to be under the disabled vehi-
cle while it is lifted by the towing equipment;
²do not allow passengers to ride in a vehicle being
towed;
²always observe all state and local laws involving
warning signals, night illumination, speed, etc.
²do not attempt a towing operation that could jeop-
ardize the safety of the operator, bystanders or other
motorists;
²do not exceed a towing speed of 48 km/h (30 mph);
²avoid towing distances of more than 24 km (15
miles) whenever possible; and
²do not attach tow chains or a tow sling to a
bumper, the steering linkage, the universal joints,
the constant velocity (CV) joints, or a drive shaft.
CLEARANCES AND RAMP ANGLE
SURFACE CLEARANCE
The end of the disabled vehicle that is attached to
the tow vehicle should be lifted a minimum of 10 cm
or four inches off the surface. Inspect to ensure that
the opposite end of the disabled vehicle has clearance
from the surface.
RAMP ANGLEÐFLAT-BED TOWING
If a vehicle with flat-bed towing equipment is used,
the approach ramp angle should not exceed 15 de-
grees.
SLING-TYPE, FRONT-END TOWING
XJ VEHICLES
Use the following guidelines when the tow vehicle
is attached to the front end of a disabled vehicle.
(1) Always tow with the front wheels lifted off the
surface and turned all the way to the right.
(2) Attach a J-hook to the disabled vehicle at the
left side of the axle (Fig. 10).
(3) Position the sling crossbar close to the J-hook
and below the front bumper (Fig. 11).
(4) Secure a chain to the right side of vehicle by
placing it over the axle shaft tube and attaching it to
a structural member.
(5) Attach the safety chains to the vehicle.
2WD With Manual Or Automatic Transmission
(6) Turn the ignition switch to the OFF position to
unlock the steering wheel.
(7) Shift the transmission to NEUTRAL, mark the
drive shaft and axle drive pinion gear shaft yoke for
installation reference. Remove the drive shaft from
the vehicle.(8) Cover the exposed end of the transmission ex-
tension housing and the universal joints. Store the
drive shaft in a safe place.
4WD, Command-Trac (231 Part-Time 4WD
Transfer Case) And Manual Transmission
(6) Turn the ignition switch to the OFF position to
unlock the steering wheel.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(7) Shift the manual transmission into a forward
gear and the transfer case to NEUTRAL.
4WD, Command-Trac (231 Part-Time 4WD
Transfer Case) And Automatic Transmission
(6) Turn the ignition switch to the OFF position to
unlock the steering wheel.
Fig. 10 Sling-Type, Front-End Towing (XJ Front
View)
Fig. 11 Sling-Type, Front-End Towing (XJ Rear
View)
JLUBRICATION AND MAINTENANCE 0 - 9

When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(7) Shift the automatic transmission to PARK and
the transfer case to NEUTRAL.
4WD, Selec-Trac (242 Full-Time 4WD Transfer
Case) And Automatic Transmission
(6) Turn the ignition switch to the OFF position to
unlock the steering wheel.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(7) Shift the automatic transmission to PARK and
the transfer case to NEUTRAL.
YJ VEHICLES
Use the following guidelines when the tow vehicle
is attached to the front of a disabled vehicle.
(1) Always tow with the front wheels lifted off the
surface and turned all the way to the right.
CAUTION: Use tow chains with T-hooks for con-
necting to the disabled vehicle's frame rails (Fig.
12). Never use J-hooks.
(2) Attach the T-hooks to the slots in the front end
of each frame rail (Fig. 13).
(3) Position each safety chain over the top of each
front spring and inboard of each front spring shackle.
(4) Double wrap each chain.
(5) Position the sling crossbar under the front
bumper.
Command-Trac (231 Part-Time 4WD Transfer
Case) And Manual Transmission
(6) Turn the ignition switch to the OFF position to
unlock the steering wheel.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(7) Shift the manual transmission to a forward
gear and the transfer case to NEUTRAL.Command-Trac (231 Part-Time 4WD Transfer
Case) And Automatic Transmission
(6) Turn the ignition switch to the OFF position to
unlock the steering wheel.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(7) Shift the automatic transmission to PARK and
the transfer case to NEUTRAL.
SLING-TYPE, REAR-END TOWING
YJ VEHICLESÐUse wheel-lift equipment ONLY
when towing from the rear end of the vehicle is nec-
essary.
XJ VEHICLESÐUse the following guidelines
when the tow vehicle is attached to the rear of the
disabled vehicle.
(1) Attach J-hooks around the axle shaft tubes out-
board of the shock absorber.
(2) Place the sling crossbar under and forward of
the bumper.
(3) Attach safety chains around the frame rails.
2WD With Manual Or Automatic Transmission
(1) Attach J-hooks around the axle shaft tubes out-
board of the shock absorber.
(2) Place the sling crossbar under and forward of
the bumper.
(3) Attach safety chains around the frame rails.
(4) Turn the ignition switch to the OFF position to
unlock the steering wheel.
(5) Clamp the steering wheel with the front wheels
in the straight ahead position. Do not use the steer-
ing column lock as a substitute for a clamping de-
vice.
(6) Shift the transmission to NEUTRAL.
Fig. 12 Tow Chains & Hooks
Fig. 13 Sling-Type, Front-End Towing (YJ Vehicles)
0 - 10 LUBRICATION AND MAINTENANCEJ

4WD, Command-Trac (231 Part-Time 4WD
Transfer Case) And Manual Transmission
(1) Attach J-hooks around the axle shaft tubes out-
board of the shock absorber.
(2) Place the sling crossbar under and forward of
the bumper.
(3) Attach safety chains around the frame rails.
(4) Turn the ignition switch to the OFF position to
unlock the steering column.
(5) Clamp the steering wheel with the front wheels
in the straight ahead position. Do not use the steer-
ing column lock as a substitute for a clamping de-
vice.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(6) Shift the transmission to a forward gear and
the transfer case to NEUTRAL.
4WD, Command-Trac (231 Part-Time 4WD
Transfer Case) And Automatic Transmission
(1) Attach J-hooks around the axle shaft tubes out-
board of the shock absorber.
(2) Place the sling crossbar under and forward of
the bumper.
(3) Attach safety chains around the frame rails.
(4) Turn the ignition switch to the OFF position to
unlock the steering column.
(5) Clamp the steering wheel with the front wheels
in the straight ahead position. Do not use the steer-
ing column lock as a substitute for a clamping de-
vice.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(6) Shift the transmission to PARK and the trans-
fer case to NEUTRAL.
4WD, Selec-Trac (242 Full-Time 4WD Transfer
Case) And Automatic Transmission
(1) Attach J-hooks around the axle shaft tubes out-
board of the shock absorber.
(2) Place the sling crossbar under and forward of
the bumper.
(3) Attach safety chains around the frame rails.
(4) Turn the ignition switch to the OFF position to
unlock the steering column.
(5) Clamp the steering wheel with the front wheels
in the straight ahead position. Do not use the steer-
ing column lock as a substitute for a clamping de-
vice.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(6) Shift the transmission to PARK and the trans-
fer case to NEUTRAL.TOWING WHEN IGNITION KEYS ARE NOT
AVAILABLE
VEHICLE DOORS UNLOCKED
2WD Vehicles
Either one of two methods can be used:
²tow the vehicle with the drive shaft removed (refer
to Sling-Type, Front-End Towing); or
²place a tow dolly under the rear wheels (Fig. 14)
and tow with the front end raised (refer to Sling-
Type, Front-End Towing).
4WD, Command-Trac (231 Part-Time 4WD
Transfer Case) And Manual Transmission
(1) Shift the manual transmission to a forward
gear.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(2) Shift the transfer case to NEUTRAL.
(3) The vehicle can now be towed with the front
wheels raised (refer to Sling-Type, Front-End Tow-
ing).
4WD, Command-Trac (231 Part-Time 4WD
Transfer Case) And Automatic Transmission
(1) Check and ensure that the automatic transmis-
sion is in PARK.
When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(2) Shift the transfer case to NEUTRAL.
(3) The vehicle can now be towed with the front
wheels raised (refer to Sling-Type, Front-End Tow-
ing).
4WD, Selec-Trac (242 Full-Time 4WD Transfer
Case) And Automatic Transmission
(1) Check and ensure that the automatic transmis-
sion is in PARK.
Fig. 14 Sling-Type, Front-End Towing With Rear
Wheels On A Tow Dolly
JLUBRICATION AND MAINTENANCE 0 - 11

When the transfer case is in the NEUTRAL po-
sition, both axles are disengaged from the pow-
ertrain. This allows the vehicle to be towed
without removing the drive shafts.
(2) Shift the transfer case to NEUTRAL.
(3) The vehicle can now be towed with the front
wheels raised (refer to Sling-Type, Front-End Tow-
ing).
VEHICLE DOORS LOCKED
Place a tow dolly under the rear wheels (Fig. 14)
and tow with the front end raised (refer to Sling-
Type, Front-End Towing).
4WD EMERGENCY TOWINGÐTRANSFER CASE
NOT SHIFTED TO NEUTRAL
When a situation arises and the transfer case can-
not be shifted to NEUTRAL, any of the following
methods can be used to tow a 4WD vehicle.
Drive shafts not removed, place the rear
wheels on a tow dolly and tow with the front
end raised.
Drive shafts not removed, place the front
wheels on a tow dolly and tow with the rear end
raised.
Rear drive shaft removed, tow with the front
end raised.
Front drive shaft removed, tow with the rear
end raised.
Both drive shafts removed, tow with all four
wheels on the road surface.
(1) Turn ignition key switch to the unlocked (OFF)
position.
(2) Shift the transmission to the NEUTRAL posi-
tion.
(3) Determine the method by which the vehicle
will be towed and prepare the vehicle for towing.
(4) Connect the vehicle to the tow vehicle. Refer to
the applicable procedure.
FLAT TOWING (4 TIRES/WHEELS ON
SURFACE)
Tow a vehicle in this manner only when all four
wheels will freely rotate. Prepare the vehicle accord-
ing to the following procedures.
2WD VEHICLES
(1) Mark the drive shaft and the axle drive pinion
gear shaft yoke for installation alignment reference.
(2) Remove the drive shaft. Install a protective
covering over the drive shaft U-joints to retain them
assembled and protected.
(3) Cover the open end of the transmission exten-
sion housing.4WD VEHICLES
(1) Mark the drive shafts and the axle drive pinion
gear shaft yokes for installation alignment reference.
(2) Remove the drive shafts. Install a protective
covering over the drive shaft U-joints/CV-joints to re-
tain them assembled and protected.
(3) Cover the exposed ends of the transfer case.
CAUTION: Whenever a drive shaft has been re-
moved and installed, check the transmission fluid
level of the transmission and transfer case. Driving
a vehicle with low tranfer case fluid can damage the
transmission and transfer case.
EMERGENCY TOW HOOKS
WARNING: REMAIN AT A SAFE DISTANCE FROM A
VEHICLE THAT IS BEING TOWED VIA ITS TOW
HOOKS. THE TOW STRAPS/CHAINS COULD POSSI-
BLY BREAK AND CAUSE SERIOUS INJURY.
Some Jeeptvehicles are equipped with emergency
tow hooks located at the front end (Fig. 15). Some
Jeeptvehicles also have emergency tow hooks lo-
cated at the rear ende. The tow hooks should be used
forEMERGENCYpurposes only.
CAUTION: DO NOT use emergency tow hooks for
tow truck hook-up or highway towing.
Fig. 15 Emergency Front Tow HooksÐXJ & YJ
Vehicles
0 - 12 LUBRICATION AND MAINTENANCEJ

If the transfer case ATF is warm, it is accept-
able for the fluid to drip out of the fill hole. If
the fluid gushes out of the fill hole, the level is
too high.
(3) If the level is low, raise it to the bottom edge of
the fill hole with MOPAR ATF PLUS type 7176 or
an equivalent MerconŸ/Dexron IIŸ ATF.
(4) Install the fill-hole plug. Tighten the plug with
47 NIm (35 ft. lbs.) torque.
(5) Remove the support and lower the vehicle.
FLUID CHANGE
When it becomes necessary to change the ATF in a
Jeepttransfer case, use the following procedure.
(1) Raise and support the vehicle.
(2) Remove the fill-hole plug from the transfer
case.
(3) Place an appropriate container under the trans-
fer case drain-hole plug.
(4) Remove the drain-hole plug and drain the ATF
from the transfer case into the container.
Care should be exercised when disposing used
ATF after it has been drained from a transfer
case.
CAUTION: Do not over-tighten the drain and fill-hole
plugs. Over-tightening can strip the hole threads
and/or crack the aluminum housing.
(5) Install the drain-hole plug in the transfer case.
Tighten the plug with 47 NIm (35 ft. lbs.) torque.
(6) Fill the transfer case to the bottom edge of the
fill hole with MOPAR ATF PLUS type 7176 (or an
equivalent MerconŸ/Dexron IIŸ ATF).
(7) Install the fill-hole plug in the transfer case.
Tighten the plug with 47 NIm (35 ft. lbs.) torque.
(8) Remove the support and lower the vehicle.
FRONT AND REAR AXLES
RECOMMENDED MAINTENANCE
The lubricant level in axle differential housings
should be determined at the same time as the engine
oil is changed and the oil filter is replaced. Add lu-
bricant as necessary.
In addition, with normal driving conditions, the
axle lubricant should be changed after each 48
000-km (30,000-miles). With severe driving condi-
tions, after each 29 000-km (12,000-miles).
LUBRICANT SPECIFICATIONS
For normal vehicle operation, use SAE 75W-90,
API Quality Grade GL-5 gear lubricant in all Jeept
front (4WD only) and rear axles. Vehicles equipped
with a Trac-Loc rear axle also require a friction mod-
ifier additive with the gear lubricant.
When involved in trailer towing applications
use SAE 80W-140, API Quality Grade GL-5 gearlubricant in the rear axle. XJ Vehicles equipped
with a class III trailer hitch require SAE
75W-140 synthetic gear lubricant in the rear
axle.
LUBRICANT LEVEL
Determine the axle differential housing lubricant
level according to the following procedure.
(1) Raise and support the vehicle.
(2) Remove the fill-hole plug (Figs. 10 and 11)
from the axle differential housing cover. The gear lu-
bricant should be 13 mm (1/2 inch) below the bottom
edge of the fill hole.
(3) If not acceptable, raise the lubricant level to 13
mm (1/2 inch) below the bottom edge of the fill hole.
Add lubricant in small amounts to raise the
level.
(4) Install the fill-hole plug in the differential
housing cover. Tighten the plug with 34 NÉm (25 ft.
lbs.) torque.
(5) Remove the support and lower the vehicle.
Fig. 10 Rear AxleÐTypical
Fig. 11 Front Axle (4WD)ÐTypical
0 - 26 LUBRICATION AND MAINTENANCEJ

LUBRICANT CHANGE
When it becomes necessary to change the axle lu-
bricant in a Jeeptfront or rear axle, use the follow-
ing procedure.
(1) Raise and support the vehicle.
(2) Place a container under the axle differential
housing.
(3) Remove the axle differential housing cover
bolts. Remove the housing cover.
(4) Allow the axle gear lubricant to completely
drain into the container.
CAUTION: Do not flush a rear axle Trac-Loc differ-
ential. Trac-Loc differentials may be cleaned only
by disassembling the unit and wiping the compo-
nents with clean, lint-free cloth.
(5) Flush the inside of the differential housing
with a flushing oil.Do not use water, steam, ker-
osene or gasoline for flushing.
(6) Remove any residual RTV sealant/gasket mate-
rial from the differential housing and cover. Thor-
oughly clean the contact surfaces with mineral
spirits and dry the surfaces completely.
(7) Apply a`bead of MOPAR RTV Sealant, or an
equivalent sealant, around the bolt circle on the
housing and on the cover (Fig. 12).
If differential housing cover is not installed
within 20 minutes after applying sealant, the
sealant must be removed and another bead ap-
plied.
(8) Install the cover on the differential housing
with the attaching bolts (Fig. 13). Tighten the cover
bolts with 47 NIm (35 ft. lbs.) torque.(9) Remove the fill-hole plug and add the replace-
ment gear lubricant to the differential housing. Refer
to Specifications above.
(10) Install the fill-hole plug. Tighten the plug
with 34 NÉm (25 ft. lbs.) torque.
(11) Remove the support and lower the vehicle.
DRIVE SHAFTS
RECOMMENDED LUBRICATION
With normal driving conditions, the drive shaft
U-joint couplers and slip yoke splines (Figs. 14 and
15) should be lubricated after each 12 000-km (7,500-
miles). With severe driving conditions, after each 4
800-km (3,000-miles).
Fig. 12 RTV Sealant ApplicationÐTypical
Fig. 13 Differential Housing Cover Installed
Fig. 14 Front Drive Shaft (4WD)ÐTypical
JLUBRICATION AND MAINTENANCE 0 - 27

CAUTION: It is very important that drive shafts be
lubricated at periodic intervals and that the speci-
fied type of lubricant be used. Failure to properly
lubricate could result in premature wear of drive
shaft components.
LUBRICATION FITTINGS
The drive shaft universal-joint couplers (U-joints)
and the front drive shaft slip yoke splines are
equipped with Zerk fittings. The (CV-joints) are lu-
bricated when assembled during manufacture and do
not require additional lubrication.
LUBRICANT SPECIFICATION
Drive shaft U-joint couplers and slip yoke splines
should be lubricated with a lubricant that is identi-
fied as NLGI GC-LB lubricant.
SLIP-YOKE SPLINE LUBRICATION
The method below will ensure complete lubrication
of the front drive shaft slip-yoke splines (Fig. 14).
(1) Clean the tips of the Zerk type fittings.
(2) Use a gun or another appropriate lubricant dis-
penser to force pressurized lubricant into the slip
yoke Zerk fittings.
(3) When the lubricant appears, cover the pressure
relief hole with a finger. Force pressurized lubricant
into fitting until it appears at slip-yoke seal.
RUBBER AND PLASTIC HOSES/TUBING
RECOMMENDED MAINTENANCE
The condition of underbody rubber hose and plastic
tubing should be inspected for failure at the same
time as oil is changed and oil filter is replaced.
HOSE/TUBING INSPECTION
Vehicle operating conditions determine the useable
life of underbody hoses and tubing. These conditions
include:²the extent and quality of vehicle maintenance,
²the geographic area of vehicle operation, and
²the length of exposure time to excess heat and
chemical contaminants.
(1) Inspect all hose and tubing fittings for loose-
ness and corrosion. Inspect the rubber hoses for brit-
tleness and cracks. Thoroughly inspect the hose ends
(those that are slipped over nipple connectors) for
splits (Figs. 16, 17, 18, 19, 20, 21 and 22).
Fig. 16 Front Axle Vent Hose (4WD)ÐXJ Vehicles
Fig. 17 Front Axle Vent HoseÐYJ Vehicles
Fig. 15 Rear Drive Shaft (4WD)ÐTypical
0 - 28 LUBRICATION AND MAINTENANCEJ