1988 JEEP CHEROKEE engine
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computers may lose memory data. When battery power is
restored, driveability problems may exist on some vehicles.
These vehicles may require a relearn procedure. See COMPUTER
RELEARN PROCEDURES article in GENERAL INFORMATION section.
REPLACING BLOWN FUSES
Before replacing a blown fuse, remove ignition key, turn off
all lights and accessories to avoid damaging the electrical system. Be
sure to use fuse with the correct indicated amperage rating. The use
of an incorrect amperage rating fuse may result in a dangerous
electrical system overload.
BRAKE PAD WEAR INDICATOR
Indicator will cause a squealing or scraping noise, warning
that brake pads need replacement.
BRAKE WARNING LIGHT
CAUTION: If BRAKE warning light is on with parking brake disengaged
and engine running, there may be a problem in the hydraulic
brake system. Braking effort, brake pedal travel and
stopping distances may increase.
CATALYTIC CONVERTER
To prevent catalytic converter overheating, DO NOT allow
engine to idle for more than 20 minutes.
COMMAND-TRAC (4WD)
CAUTION: NEVER operate a Command-Trac vehicle in 4WD on dry,
hard-surfaced roads for a sustained period. Use 4L only
when needed for added pulling power. Operating vehicle in
4WD mode on such roads will cause stress and possible
damage to components, as well as make shifting difficult.
To reduce shifting effort, drive vehicle in Reverse for a
few feet, or drive off hard-surfaced road momentarily to
allow tire slippage.
FRONT AND REAR DIFFERENTIALS (4WD)
CAUTION: DO NOT use water, steam, kerosene or gasoline for flushing
a differential. ONLY use a flushing oil.
TRAC-LOK DIFFERENTIALS (4WD)
CAUTION: DO NOT flush a rear axle Trac-Lok differential. Trac-Lok
differentials may be cleaned only by disassembling the
unit and wiping the components with clean, lint-free cloth.
CAUTION: NEVER attempt to engage Low range when vehicle is moving
faster than 2-3 MPH, as transfer case damage may result.
GASOLINE CONTAINING ALCOHOL
CAUTION: Exclusive use of gasohol is not recommended. Vehicle test
results have shown that significant fuel system corrosion
can result when gasohol is used exclusively.
Page 952 of 1378
HALOGEN BULBS
Halogen bulbs contain pressurized gas which may explode if
overheated. DO NOT touch glass portion of bulb with bare hands. Eye
protection should be worn when handling or working around halogen
bulbs.
OIL FILTER
CAUTION: The engine oil filter mount has metric threads. Use of a
filter with improper threads can result in oil leakage and
possible engine damage. Look for M20 x 1.5 symbol on the
filter.
RADIATOR CAP
CAUTION: Always disconnect the fan motor when working near the
radiator fan. The fan is temperature controlled and could
start at any time even when the ignition key is in the OFF
position. DO NOT loosen or remove radiator cap when cooling
system is hot.
RADIATOR FAN
Keep hands away from radiator fan. Fan is controlled by a
thermostatic switch which may come on or run for up to 15 minutes even
after engine is turned off.
WHEEL & TIRE WARNINGS
CAUTION: Replacing original tires with different size tires may
result in false speedometer and odometer indications. Check
with dealer before using different size tires on vehicle.
CAUTION: Ensure all 4 wheels on vehicle have same tire size, type
and circumference in order to provide proper vehicle
handling. DO NOT mix radial-ply with bias-ply or
bias-belted tires. On 4WD vehicles, if tire size, type and
circumference on all 4 wheels are not the same, gear
shifting will be adversely affected and can damage transfer
case.
CAUTION: Temporary-use spare tires are for emergency use only. DO
NOT drive vehicle faster than 50 MPH or more than 100 miles
when using spare tire. DO NOT operate vehicle in 4WD mode
when using spare tire, as damage to transfer case can
result. Temporary-use spare tires have a total tread life
of 3,000 miles.
SERVICE POINT LOCATIONS
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* Sustained High Speed Driving
* Extensive Idling Conditions (Taxi Or Delivery-Type Service)
* Driving Off-Road Or In Salty Or Sandy Areas
* Driving In Water
Normal Service
* Driven More Than 10 Miles Daily
* No Severe Service Operating Conditions
SEVERE SERVICE REQUIREMENTS (PERFORM W/SERVICE SCHEDULES)
NOTE: The following services are to be performed on vehicles
subjected to severe service. See SEVERE & NORMAL SERVICE
DEFINITIONS. This service is to be performed in addition
to the normal services listed in the NORMAL MAINTENANCE
SERVICE SCHEDULES.
SEVERE SERVICE CONDITIONS/ACTIONS TABLE
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Condition Action Item Perform Every (1)
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Short Trips Replace Engine Oil 3,000 Miles or 3 Months
(About 15 Miles)
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Desert Or Cold Replace Engine Oil 3,000 Miles or 3 Months
Climate Operations
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Towing Or Heavily Replace Engine Oil 3,000 Miles or 3 Months
Loaded
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
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Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Severe Dust Replace Engine Oil 3,000 Miles or 3 Months
Conditions
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Hot Weather, Stop- Replace Engine Oil 3,000 Miles or 3 Months
And-Go Driving
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Sustained High Replace Engine Oil 3,000 Miles or 3 Months
Speed Driving
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Extensive Idling Replace Engine Oil 3,000 Miles or 3 Months
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Or Delivery Type Replace Engine Oil 6,000 Miles or 6 Month")
Conditions (Taxi \
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Or Delivery Type Replace Engine Oil 6,000 Miles or 6 Months
Service) Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Driving Off-Road Replace Engine Oil 3,000 Miles or 3 Months
Or In Salty Or
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Sandy Areas Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Replace 4WD: Engine 50 Hours
Oil
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Driving In Water Replace Engine Oil 3,000 Miles or 3 Months
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Replace Engine Oil 6,000 Miles or 6 Months
Filter
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Service Lube Prop 3,000 Miles
Shaft If
Equipped With
Fittings
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Replace A/T Fluid 12,000 Miles
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Replace Front And/Or 12,000 Miles
Rear Axle Oil
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Replace M/T Fluid Oil 18,000 Miles
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Service Lube Prop Daily
Shaft Slip
Splines
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(
1) - Perform these services at the mileage, hours of operation, or
number of months (since last time), whichever comes first.
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NORMAL MAINTENANCE SERVICE SCHEDULES
CAUTION: The following service schedules refer to vehicles driven
under normal operating conditions. For vehicles driven under
severe conditions, additional services may be necessary. See
SEVERE SERVICE REQUIREMENTS (PERFORM W/SERVICE SCHEDULES)
above in this article for additional service requirements.
5,000 MILE (8,000 KM) SERVICE
5,000 MILE (8,000 KM) SERVICE \
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Service Or Inspect
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Check Fluid Levels
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Inspect Coolant Hoses and Clamps
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Curb & Fast Idle Speed
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7,500 MILE (12,000 KM) SERVICE
7,500 MILE (12,000 KM) SERVICE \
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Service Or Inspect
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Check Fluid Levels
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Inspect Coolant Hoses and Clamps
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Inspect Brake System
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Inspect Exhaust System
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Inspect Underside of Vehicle (Bolts & Threaded Fasteners)
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Check/Lube Manual Steering Gear
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Check Drive Shaft Seals
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Lubricate Ball Joints, Steering Linkage & Suspension
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Lube Drive Shaft U-Joints and Slip Splines
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Lube Front Axle Drive Joint and Pivot Bearings (4WD)
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Rotate Tires and Adjust Air Pressure (Including Spare)
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Replace
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Engine Oil
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Oil Filter
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Rear Axle Fluid (Limited Slip)
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Lubrication Specifications
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Application Specification
Page 962 of 1378
Automatic Transmission .......................... Dexron-IIE ATF
Brake Master Cylinder .......... DOT 3 (SAE J-1703F) Brake Fluid
Engine Coolant ........... Alugard 340-2 & Water (50/50 Mixture)
Engine Oil (
1)
Gasoline Engine
Temperature Range
Above 30
F (-1
C) ........ SAE 20W-40 Or 20W-50 API SH/CD
Above 0
F (-18
C) ......... SAE 10W-30 Or 10W-40 API SH/CD
Less Than 60
F (16
C) ............... SAE 5W-30 API SH/CD
Drive Axles ................................ SAE 75W-90 API GL-5
Drive Axles (Trac-Lok) (
2) ................ SAE 80W-140 API GL-5
Drive Axles (Trailer Towing) .............. SAE 80W-140 API GL-5
Hydraulic Clutch ............... DOT 3 (SAE J-1703F) Brake Fluid
Manual Transmission ........................ SAE 75W-90 API GL-5
Parking Brake Cable Guides ................. NLGI Grade 2, GC-LB
Door & Hood Hinges ............................ Light Engine Oil
Manual Steering Box ............... Multi-Purpose NLGI Grade 2EP
Power Steering Pump ....................... Power Steering Fluid
Transfer Case ................................... Dexron-IIE ATF
Brake Caliper Bushings ........ GE 661 or DOW 111 Silicone Grease
Caliper Slide Pins ........... GE 661 or DOW 111 Silicone Grease
Wheel Bearings .................. Multi-Purpose NLGI Grade GC-LB
Drive Shaft U-Joints .............. Multi-Purpose NLGI Grade 2EP
Steering Linkage (
4)( 5) .................... NLGI Grade 2, GC-LB
Ball Joints (
4)( 6) ......................... NLGI Grade 2, GC-LB
Weatherstrip .......................... Silicone Spray Lubricant
Wheel Lug Nut Torque ...................... 95 ft. lbs. (129 N.m)
(
1) - SAE 10W-30 SH/CD is preferred.
(
2) - Add 4 ozs. (118 ml) of Limited-Slip differential lubricant
additive when changing fluid.
(
3) - For vehicles operating under heavy-duty towing conditions,
use SAE 75W-140 Synthetic lube.
NOTE: Before using SAE 75W-140 Synthetic the old fluid must
be DRAINED and FLUSHED with clean mineral based axle
lubricant. Then refill with new synthetic lube.
(
4) - Use low pressure grease gun to prevent seal damage.
(
5) - Fill until lubricant squeezes out from the base of seals.
(
6) - Fill ball joint until seal starts to swell.
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Fluid Capacities
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Application ( 1) Quantity
Automatic Transmission
1984-86 (904 HD)
Fluid Change ............................... 4.0 Qts. (3.8L)
Overhaul (Dry Fill) ........................ 8.0 Qts. (7.6L) \
1987-88
Fluid Change ............................... 4.0 Qts. (3.8L)
Overhaul (Dry Fill) ........................ 8.5 Qts. (8.0L) \
Cooling System (
2)
4-Cylinder .................................. 10.0 Qts. (9.5L)
6-Cylinder ................................. 12.0 Qts. (11.4L)
Engine Oil
4-Cylinder ................................... 4.0 Qts. (3.8L)
6-Cylinder ................................... 6.0 Qts. (5.7L)
Fuel Tank
Standard .................................. 13.5 Gals. (51.1L)
Optional .................................... 20 Gals. (75.7L)
Manual Transmission (
3)
AX4 (AISIN) .................................. 7.4 Pts. (3.5L) \
T4 (Borg-Warner) ............................. 3.9 Pts. (1.8L) \
Page 964 of 1378
![JEEP CHEROKEE 1988 Service Repair Manual Inspect Front Wheel Bearings (4WD)
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Inspect Front Wheel Bearings (4WD)
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Check Operation of Horn, Wipers/Washers & All Exterior Lights
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Inspect Condition of Wiper Blades
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Check Headlight Alignment
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Check Seat Belt Webbing and Release Mechanisms
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Check Parking Brake Operation
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Check Shift/Clutch Interlock Operation
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Lubricate Weatherstripping with Silicone
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Lubricate Door Hinges
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Lubricate Door Locks
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Check Body Drain Holes
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Rotate Tires and Adjust Air Pressure
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Replace
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Engine Oil
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Oil Filter
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Automatic Transmission Fluid, Filter and Adjust Bands
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Lubrication Specifications
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Application Specification
Automatic Transmission .......................... Dexron-IIE ATF
Brake Master Cylinder .......... DOT 3 (SAE J-1703F) Brake Fluid
Engine Coolant ........... Alugard 340-2 & Water (50/50 Mixture)
Engine Oil (
1)
Gasoline Engine
Temperature Range
Above 30
F (-1
C) ........ SAE 20W-40 Or 20W-50 API SH/CD
Above 0
F (-18
C) ......... SAE 10W-30 Or 10W-40 API SH/CD
Less Than 60
F (16
C) ............... SAE 5W-30 API SH/CD
Drive Axles ................................ SAE 75W-90 API GL-5
Drive Axles (Trac-Lok) (
2) ................ SAE 80W-140 API GL-5
Drive Axles (Trailer Towing) .............. SAE 80W-140 API GL-5
Hydraulic Clutch ............... DOT 3 (SAE J-1703F) Brake Fluid
Manual Transmission ........................ SAE 75W-90 API GL-5
Parking Brake Cable Guides ................. NLGI Grade 2, GC-LB
Door & Hood Hinges ............................ Light Engine Oil
Manual Steering Box ............... Multi-Purpose NLGI Grade 2EP
Power Steering Pump ....................... Power Steering Fluid
Transfer Case ................................... Dexron-IIE ATF
Brake Caliper Bushings ........ GE 661 or DOW 111 Silicone Grease
Caliper Slide Pins ........... GE 661 or DOW 111 Silicone Grease
Wheel Bearings .................. Multi-Purpose NLGI Grade GC-LB
Drive Shaft U-Joints .............. Multi-Purpose NLGI Grade 2EP
Steering Linkage (
4)( 5) .................... NLGI Grade 2, GC-LB
Ball Joints (
4)( 6) ......................... NLGI Grade 2, GC-LB
Weatherstrip .......................... Silicone Spray Lubricant
Wheel Lug Nut Torque ...................... 95 ft. lbs. (129 N.m)