transmission fluid JEEP CHEROKEE 1988 Service Repair Manual
[x] Cancel search | Manufacturer: JEEP, Model Year: 1988, Model line: CHEROKEE, Model: JEEP CHEROKEE 1988Pages: 1378, PDF Size: 19.9 MB
Page 90 of 1378
![JEEP CHEROKEE 1988 Service Repair Manual AB BREVIA TIO NS
1988 J e ep C hero ke e
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
"A" ABBREVIATION TABLE
"A" ABBREVIATION TABLE \](/img/16/57037/w960_57037-89.png "JEEP CHEROKEE 1988 Service Repair Manual AB BREVIA TIO NS
1988 J e ep C hero ke e
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
\"A\" ABBREVIATION TABLE
\"A\" ABBREVIATION TABLE \")
AB BREVIA TIO NS
1988 J e ep C hero ke e
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
"A" ABBREVIATION TABLE
"A" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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A Amperes
A/C Air Conditioning
A/T Automatic Transmission/Transaxle
AAP Auxiliary Accelerator Pump
AB Air Bleed
ABCV Air Bleed Control Valve
ABDC After Bottom Dead Center
ABRS Air Bag Restraint System
ABS Anti-Lock Brake System
AC Alternating Current
ACC A/C Clutch Compressor
ACCS A/C Cycling Switch
ACCUM Accumulator
ACCY Accessory
ACT Air Charge Temperature Sensor
ACV Thermactor Air Control Valve
ADJ Adjust or Adjustable
ADV Advance
AFS Airflow Sensor
AI Air Injection
AIR or A.I.R. Air Injection Reactor
AIS Air Injection System
ALCL Assembly Line Communications Link
ALDL Assembly Line Diagnostic Link
ARC Automatic Ride Control
ASCD Automatic Speed Control Device
ASCS Air Suction Control Solenoid
ASD Auto Shutdown
ASDM Air Bag System Diagnostic Module
ASV Air Suction Valve
ATC Automatic Temperature Control
ATDC After Top Dead Center
ATF Automatic Transmission Fluid
ATS Air Temperature Sensor
AXOD Automatic Transaxle Overdrive
Abs. Absolute
Accy. Accessory
Alt. Alternator or Altitude
Amp. Ampere
Assy. Assembly
Auto. Automatic
Aux. Auxiliary
Avg. Average
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"B" ABBREVIATION TABLE
"B" ABBREVIATION TABLE
Page 196 of 1378
Brake switch is an input device mounted above the brake
pedal. When brake pedal is operated, brake switch delivers an input
signal to the TCM. The TCM uses input signal for controlling No. 3
valve body solenoid for torque converter lock-up.
NEUTRAL SAFETY SWITCH
NOTE: Neutral safety switch may be referred to as park/neutral
safety switch or gear select switch.
Neutral safety switch is an input device mounted on the
transmission manual valve shaft. Neutral safety switch delivers an
input signal to TCM, indicating transmission manual valve gear
position.
SPEED SENSOR
Speed sensor, mounted in adapter housing or extension
housing, is an input device consisting of speed sensor rotor and speed
sensor. Speed sensor rotor is mounted on transmission output shaft.
Input signal is delivered from speed sensor to TCM with each
revolution of transmission output shaft. The TCM uses input signal for
controlling transmission operation.
THROTTLE POSITION SENSOR (TPS)
The TPS, mounted on throttle body, determines throttle
position and delivers an input signal to TCM. The TCM uses input
signal for controlling transmission upshifts and torque converter
lock-up.
SELF-DIAGNOSTIC SYSTEM
DIAGNOSTIC PROCEDURE
When performing vehicle diagnosis:
* Ensure transmission fluid level is correct and fluid is
neither contaminated nor aerated.
* Ensure shift cable is properly adjusted. Refer to the
appropriate TRANSMISSION SERVICING - A/T article in
this section.
* Ensure battery is fully charged.
* Perform visual inspection, ensuring all electrical
connections at transmission, TCM, throttle position sensor,
neutral safety switch, speed sensor and brake switch are
clean and properly installed.
* Perform TEST 1A - VERIFICATION OF THE COMPLAINT under TROUBLE
SHOOTING CHARTS in this article.
* Repair diagnostic trouble codes in order displayed.
* Always perform TEST 2A - VERIFICATION TEST after repair is
completed. See TEST 2A - VERIFICATION TEST under TROUBLE
SHOOTING CHARTS in this article.
RETRIEVING DIAGNOSTIC TROUBLE CODES
NOTE: Manufacturer recommends using Chrysler's Diagnostic Readout
Box-II (DRB-II) with proper cartridge for system diagnosis.
Other after-market scan tools may be used for system
diagnosis. The following procedure is for DRB-II scan tool
usage. Use manufacturer's instruction for operating the
Page 206 of 1378
This test verifies the correct operation of the AW4
transmission. It must be performed after finding no faults using the
DRB-II, and after a vehicle repair has been made.
1) Turn ignition key to "OFF".
2) Hold the MODE key and press the ATM key on the DRB-II at
the same time to restart the DRB-II.
3) Turn ignition key to "ON".
4) Reconnect all previously disconnected connectors.
5) Verify that the AW4 transmission control unit is properly
mounted.
6) Make sure the transmission fluid is at the proper level.
Check the fluid with the transmission temperature hot, the vehicle on
level ground, and the gear selector in neutral.
7) If any repairs have been made, test the vehicle as
instructed in TEST 1A - VERIFICATION OF THE COMPLAINT , and read faults
using the DRB-II. If there are any fault messages present, repeat TEST
1A - VERIFICATION OF THE COMPLAINT.
TEST 3A - STORED DIAGNOSTIC TROUBLE CODES TEST
NOTE: Perform TEST 1A - VERIFICATION OF THE COMPLAINT
before proceeding.
1) At this point, the Visual Inspection has been performed, a
"FAULT STORED" code has been found and the vehicle has been test
driven. The fault code is not "FAULT PRESENT", so it cannot be
considered a CURRENT or HARD fault.
2) All solenoid circuits are in the same harness and a common
ground wire is used for the solenoids. Use the following figures to
identify the harness and connector to inspect. See Fig. 7 and 8. if
all 3 solenoid faults are present, repair the Black wire (Cherokee)
ground wire open condition.
3) Carefully inspect the entire suspected circuit. Pay
particular attention to connectors, corrosion, accident damage, and
improper or missing parts.
4) If any problems are found, make the appropriate repair.
Then perform TEST 1A using the DRB-II.
5) Erase fault codes.
6) If no problems are found, perform the SYSTEM TEST using
the DRB-II. Re-check for fault codes. If there are no fault codes,
perform TEST 2A - VERIFICATION TEST . If fault code(s) return, perform
TEST 1A - VERIFICATION OF THE COMPLAINT .
Fig. 7: Test 3A - Location of 7-Way Connector
Page 276 of 1378
Removal
1) Raise and support vehicle. Remove drain plug and drain
transmission fluid. Remove bolts and oil pan. Remove bolts, oil screen
and gasket.
2) Disconnect electrical connectors from valve body solenoid.
Mark electrical connector location for reassembly reference if more
than one valve body solenoid is being removed. Remove bolt, valve body
solenoid and "O" ring.
CAUTION: DO NOT allow components to fall from valve body when
removing valve body solenoid.
Installation
1) To install, reverse removal procedure using NEW "O" ring
and NEW gaskets. Tighten valve body solenoid bolt and oil screen bolt
to specification. See TORQUE SPECIFICATIONS at end of article.
2) Ensure magnet is installed in oil pan and does not
interfere with valve body oil tubes. Apply 1/8" bead of Loctite 599
sealant on oil pan mounting flange. Install oil pan. Install and
tighten bolts to specification. See TORQUE SPECIFICATIONS.
3) Install NEW gasket and drain plug. Tighten drain plug to
specification. See TORQUE SPECIFICATIONS at end of article. Fill
transmission to proper fluid level with Mopar Dexron-IIE/Mercon ATF.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS \
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Application Ft. Lbs. (N.m)
Drain Plug ....................................... 15 (20)
INCH Lbs. (N.m)
Neutral Safety Switch Adjusting Bolt .......... 108 (12.2)
Neutral Safety Switch Retaining Nut ............. 61 (6.9)
Oil Pan Bolt .................................... 65 (7.3)
Oil Screen Bolt ................................. 84 (9.5)
Speed Sensor Bolt ............................... 65 (7.3)
Valve Body Solenoid Bolt ........................ 84 (9.5)
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Page 342 of 1378
CLUTCH SLAVE CYLINDER
Removal (Wrangler)
1) Disconnect slave cylinder inlet line. Remove transmission
and transfer case. Slide rubber insulator off slave cylinder lines.
Remove bolts attaching insulator bracket to clutch housing. Slide
bracket off cylinder lines.
2) Remove slave cylinder and bearing retaining nut. Pry nut
up and off mounting pin on transmission front case. Remove slave
cylinder and bearing by sliding assembly off transmission input shaft.
See Fig. 2 .
Installation
To install, reverse removal procedure. Bleed hydraulic
system.
Fig. 2: Wrangler Clutch Slave Cylinder
Courtesy of Chrysler Motors.
Removal (Cherokee, Comanche & Wagoneer)
Disconnect hydraulic line at clutch slave cylinder. Cap line
to prevent fluid loss. Remove spring holding clutch fork lever to
cylinder push rod. Remove bolts attaching slave cylinder to clutch
housing. Remove slave cylinder, heat shield, clutch fork pivot, washer
and seal.
Installation
To install, reverse removal procedure. Bleed hydraulic
system.
PILOT BUSHING
Page 435 of 1378
\003
* D RIV ETR AIN S YSTE M S U NIF O RM IN SPEC TIO N G UID ELIN ES *
1988 Jeep Cherokee
GENERAL INFORMATION
Drivetrain/Transmission Motorist Assurance Program
Standards For Automotive Repair
All Makes and Models
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
CONTENTS
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
Drive/Power Train Assemblies
AUTOMATIC TRANSMISSION/TRANSAXLE ASSEMBLIES
DIFFERENTIAL AND FINAL DRIVE ASSEMBLIES
MANUAL TRANSMISSION/TRANSAXLE ASSEMBLIES
TRANSFER CASE ASSEMBLIES
Drive/Power Train Components
ACTUATORS (ELECTRICAL)
ACTUATORS (VACUUM)
AXLES
BEARINGS AND RACES
BELL CRANKS
BELL HOUSINGS
BUSHINGS (EXTERNAL)
CABLES (SPEEDOMETER)
CABLES (TV, DETENT AND SHIFT)
CARRIER BEARINGS
CLUTCH CABLES AND CABLE HOUSINGS
CLUTCH DISCS (MANUAL TRANSMISSION)
CLUTCH FORKS
CLUTCH LINKAGES (MECHANICAL)
CLUTCH MASTER CYLINDERS
CLUTCH PEDALS
CLUTCH PIVOTS
CLUTCH PRESSURE PLATES
CLUTCH RELEASE BEARINGS
CLUTCH SLAVE CYLINDERS (CONCENTRIC)
CLUTCH SLAVE CYLINDERS (CONVENTIONAL OR EXTERNAL)
COMPANION FLANGES
CONNECTORS
COOLER BYPASS VALVES
COOLER LINES
COOLERS
CV JOINTS
DIP STICK TUBES
DIP STICKS (FLUID LEVEL INDICATORS)
DOWEL PINS, GUIDES AND PILOT HOLES
DRIVE SHAFT FLANGES
DRIVE SHAFTS AND HALF SHAFTS
DUST BOOTS
ENGINE MOUNTS
EXCITER RINGS
FILLER TUBES
FILTERS AND SCREENS
Page 436 of 1378
FLANGES
FLEX PLATES
FLUID LEVEL INDICATORS
FLUIDS AND LUBRICANTS
FLYWHEELS
FORCE MOTORS
GUIDES
HALF SHAFTS
HOSES, LINES AND TUBES
HOUSINGS (BELL, CASE, TAIL (EXTENSION) AND AUXILIARY)
INTERMEDIATE SHAFT SUPPORT BEARINGS
KEY INTERLOCK SYSTEMS
LIMITED SLIPS
LINES
LINKAGES (EXTERNAL)
LOCKING HUB ASSEMBLIES
LOCKING HUB CONTROL KNOBS
LUBRICANTS
METAL-CLAD SEALS
METALASTIC JOINTS
MODULATOR PINS
MODULATORS
MOUNTS (ENGINE, TRANSAXLE AND TRANSMISSION)
ODOMETER DRIVES (MECHANICAL)
ODOMETER HEADS (MECHANICAL)
OIL PANS
PANS
PILOT HOLES
PRESSURE PLATES
PRESSURE SWITCHES
RACES
RUBBER JOINTS (METALASTIC)
SCREENS
SEALS
SEALS (METAL-CLAD)
SELECTOR INTERLOCK SYSTEMS
SERVOS
SHIFT INTERLOCK SYSTEMS (SELECTOR AND KEY INTERLOCK SYSTEMS)
SENSORS
SIDE COVERS
SLIP YOKES
SOLENOIDS
SPEED SENSORS (ELECTRONIC WHEEL AND VEHICLE)
SPEEDOMETER-DRIVEN GEAR HOUSINGS
SPEEDOMETER/ODOMETER DRIVES (MECHANICAL)
SPEEDOMETER/ODOMETER HEADS (MECHANICAL)
SPEEDOMETERS AND ODOMETERS (ELECTRONIC)
SWITCHES
TONE WHEELS
TOOTHED RINGS (TONE WHEELS)
TORQUE CONVERTERS
TRANSAXLE MOUNTS
TRANSDUCERS (TRANSMISSION)
TRANSMISSION COOLERS
TRANSMISSION MOUNTS
TRANSMISSION PANS
TRANSMISSION RANGE INDICATORS (PRNDL)
TUBES
UNIVERSAL JOINTS (CARDON OR CROSS TYPE)
VACUUM CONTROLS
VACUUM HOSES
VACUUM MOTORS
VACUUM-OPERATED SWITCHES
Page 461 of 1378
Damaged, affecting
performance ............ A ............ Require replacement.
Missing ................. C ............ Require replacement.
Worn, affecting
performance ............ A ............ Require replacement.
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LUBRICANTS
See FLUIDS AND LUBRICANTS .
METAL-CLAD SEALS
See SEALS.
METALASTIC JOINTS
See RUBBER JOINTS (METALASTIC) .
MODULATOR PINS
MODULATOR PIN INSPECTION \
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Condition Code Procedure
Application incorrect ... B ............ Require replacement.
Missing ................. C ............ Require replacement.
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MODULATORS
MODULATOR INSPECTION \
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Condition Code Procedure
Bent, affecting
performance ............ A ............ Require replacement.
Contaminated (water, fuel,
etc.) .................. A ........ ( 1) Require replacement.
Housing cracked ......... A ............ Require replacement.
Inoperative ............. A ........ ( 2) Require replacement.
Leaking fluid
externally ............. A .. Require repair or replacement.
Leaking fluid
internally ............. A ............ Require replacement.
Leaking vacuum .......... A ............ Require replacement.
Nipple broken ........... A ............ Require replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
( 1) - Further inspection is required to determine the cause
of the contamination.
( 2) - Inoperative includes intermittent operation or out of OEM
specification.
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MOUNTS (ENGINE, TRANSAXLE AND TRANSMISSION)
MOUNT (ENGINE, TRANSAXLE AND TRANSMISSION) INSPECTION \
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Page 500 of 1378
Automatic Transmission On left side of torque
converter clutch.
Manual Transmission On left side of bellhousing.
Fluid Level Sensors
Brake Fluid In master cylinder.
Page 651 of 1378
\003
EN G IN E R EM OVA L - 6 -C YL
1988 J e ep C hero ke e
1988 ENGINES
Jeep - Engine Removal - 6-Cylinder
Cherokee, Comanche, Wagoneer, Wrangler
6-CYLINDER ENGINES
4.0L
1) Scribe hinge locations, remove engine compartment light
(if equipped) and remove hood. Disconnect battery cables and remove
battery. Drain cooling system.
2) Disconnect wire connectors from alternator, ignition coil
and distributor. Disconnect oil pressure sender wire, starter wires
and fuel injector wiring harness (if equipped). Detach 2 fuel pipe
quick connect couplings at left inner fender panel. Disconnect engine
ground strap and remove air cleaner.
3) Disconnect the vacuum purge hose at fuel vapor canister
tee. Disconnect wire from idle speed actuator and oxygen sensor.
Detach throttle cable from bracket and disconnect throttle valve rod
at bellcrank. Remove upper and lower radiator hoses.
4) On automatic transmission models, disconnect the
transmission fluid cooler tubing. On all models, remove fan shroud and
radiator. Remove fan and spacer or Tempatrol fan assembly. Hold fan
pulley to water pump flange using 5/16" x 1/2" SAE capscrew while
crankshaft is rotated.
5) Disconnect cruise control cable (if equipped). Disconnect\
wires from starter motor solenoid and disconnect CEC system harness.
Remove power brake vacuum check valve from booster (if equipped).
6) Disconnect power steering hoses from steering gear (if
equipped). Drain power steering pump reservoir and plug end of hoses.
Cap all fittings on steering gear and hoses. Raise and support
vehicle. Remove starter. Remove flywheel housing access cover.
7) Remove upper and loosen lower bellhousing-to-engine bolts.
Attach lifting equipment to engine. Raise engine off front mounts.
Place support under bellhousing. Remove remaining bellhousing-to-
engine bolts. Lift engine out of engine compartment.
4.2L
1) Remove battery and drain cooling system. Remove air
cleaner and engine compartment light from hood. Scribe hinge location
and remove hood. Disconnect and plug front fuel line at pump and fuel
return line at frame.
2) Disconnect heater hoses at heater. Label and disconnect
all wiring, lines, linkage and hoses at engine. Remove vacuum switch
assembly bracket from cylinder head cover. Remove both radiator hoses
and automatic transmission oil lines (if equipped) at radiator. Remove\
radiator and shroud.
3) Remove fan and spacer. Use 5/16" x 1/2" SAE bolt to hold
fan pulley to water pump flange. Remove starter and disconnect engine
ground strap. Remove engine mount-to-bracket nuts. Disconnect exhaust
pipe at manifold.
4) Discharge A/C system (if equipped). Disconnect and plug
hose or port openings at compressor. Disconnect hoses at power
steering gear and drain reservoir. Remove power brake vacuum check
valve. Remove bracket bolt for automatic transmission filler tube (if
equipped).
5) Lift and support vehicle. On models with automatic