1988 JEEP CHEROKEE 6 cylinder
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17) Install ignition lock. Turn key to "LOCK" position.
Remove key. Insert cylinder into housing far enough to contact shaft.
Press inward while moving ignition switch actuator rod up and down to
align parts.
18) When parts align, cylinder will move inward and a spring
loaded retainer will snap into place locking cylinder in housing. To
replace ignition switch, position key cylinder in "LOCK" position.
Remove key. Place ignition switch in "LOCK" position (second detent
from bottom).
19) Fit ignition switch actuator rod into slider hole.
Loosely install on column with 2 screws. Push switch lightly toward
lock housing to take out slack in actuator rod. Tighten screws to 34
INCH lbs. (4 N.m). DO NOT move switch out of detent position.
20) Install dimmer switch by firmly seating push rod into
switch. Compress switch until 2 (.093") drill bit shanks can be
inserted into alignment holes. Reposition upper end of push rod in
pocket of wiper/washer switch. Remove lower column cover (if
necessary).
21) With a light upward pressure on switch, install 2 screws.
Remove drill bits. Switch should click when lever is lifted and again
as lever returns, just before it reaches lower stop. Install wire
protector over wires on column jacket, being careful not to pinch
wires.
22) Remove column from vise. Position lower bracket assembly
on steering column. Install 2 bolts. Tighten to 105 INCH lbs. (12 N.
m). Aligning master splines, install coupling assembly on steering
shaft. Support coupling under joint. Drive in roll pin.
NOTE: DO NOT remove bearings from housing unless they are to be
replaced. Install new bearings if bearings are removed from
housing. Never reuse old bearings.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE \
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Application Ft. Lbs. (N.m)
Flexible Coupling Bolts .......................... 17 (23)
Steering Wheel Retaining Nut ..................... 45 (61)
Support Plate Bolts .............................. 17 (23)
INCH Lbs. (N.m)
Bearing Housing-to-Lock Housing Screws ............ 35 (4)
Bracket-to-Column Bolt .......................... 124 (14)
Column Clamp Stud ................................. 20 (2)
Column Clamp Stud Nut ........................... 106 (12)
Hazard Switch ..................................... 27 (3)
Housing Cover Screws ............................ 100 (11)
Ignition Switch Screws ............................ 35 (4)
Lock Housing-to-Jacket ........................... 90 (10)
Shift Tube Support Screws ......................... 60 (7)
Steering Column Lower Bracket Bolts ............. 106 (12)
Tilt Release Spring Retaining Screw ............... 35 (4)
Turn Signal Retaining Plate ....................... 27 (3)
Upper Bracket Nuts .............................. 106 (12)
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COIL SPRING
Removal
1) Raise and support vehicle. Remove wheel assembly. Place
reference mark on drive shaft and front axle flange. Disconnect drive
shaft at front axle. Place jack stand under axle housing. Disconnect
lower control arms at axle housing.
2) Disconnect stabilizer bar links and lower shock absorber
mounting bolts at axle housing. Disconnect track bar at the sill
bracket (if equipped). Disconnect center link at pitman arm.
3) Lower axle housing to relieve spring pressure. Remove
spring retainer mounting bolt, then remove retainer and coil spring.
Note component locations for reassembly reference.
NOTE: Coil springs are rated separately for each side of vehicle
depending on optional equipment and type of service. Ensure
springs are marked for installation in original positions.
Installation
1) Install coil spring and spring retainer. Tighten retainer
mounting bolt. Raise axle housing into position. Connect lower
control arms to axle housing.
2) Install lower shock absorber mounting bolts, center
link-to-pitman arm, track bar-to-frame bracket and stabilizer bar
links-to-axle housing. To complete installation, reverse removal
procedure.
LEAF SPRING
Removal & Installation
Raise and support vehicle. Raise axle assembly with jack to
relieve spring tension. On Wrangler models, loosen stabilizer bar
link nut. On all other models, remove stabilizer bar. Remove spring
"U" bolts and plate. Disconnect front and rear shackles from frame.
Lower spring assembly. To install, reverse removal procedure.
UPPER CONTROL ARM &
AXLE HOUSING PIVOT BUSHING
Removal
1) To remove right side upper control arm for 6-cylinder
models, disconnect right side engine mount. Raise and support engine
so rear control arm mounting bolt clears exhaust pipe. On all models,
raise and support vehicle.
2) Remove upper control arm mounting bolt from axle housing.
Disconnect control arm mounting bolt at frame rail. Remove upper
control arm. Repeat procedure for opposite control arm. Inspect
control arm for damage or distortion and replace as needed.
3) Check pivot bushings for excessive distortion,
deterioration or wear. If bushing replacement is necessary, install
Spacer (J-33581-3) between ears of control arm bracket on axle
housing. See Fig. 4.
NOTE: Spacer is not used on axle housings with solid control arm
brackets.
CAUTION: Do not attempt to remove upper control arm pivot bushing
without spacer. Tool is designed to support bracket and
prevent distortion during bushing removal.
4) Install Upper Control Arm Pivot Bushing Remover/Installer
Set (J-35581, which must include Spacer J-35581-3, Remover/Installer
Page 1217 of 1378
![JEEP CHEROKEE 1988 Service Repair Manual with fluid.
LOW-REVERSE (REAR) BAND ADJUSTMENT
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\](/manual-img/16/57037/w960_57037-1216.png "JEEP CHEROKEE 1988 Service Repair Manual with fluid.
LOW-REVERSE (REAR) BAND ADJUSTMENT
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with fluid.
LOW-REVERSE (REAR) BAND ADJUSTMENT
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Tighten Screw to Back Off
Application INCH Lbs. (N.m) Screw\
Model 727 ................. 41 (4.6 N.m.) .................... 2 Turns\
Model 904 ................. 41 (4.6 N.m.) .................... 7 Turns\
Model 999 ................. 41 (4.6 N.m.) .................... 4 Turns\
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TRANSMISSION THROTTLE CABLE/LINKAGE
NOTE: A special Idle Speed Actuator (ISA) Exerciser Box Tool is
required to initially set ISA motor and adjust transmission
throttle linkage on vehicles with transmission model 999
with 4-cylinder engines.
727 Transmission with 6-Cylinder Engines
1) Disconnect throttle control rod spring. Use spring to
hold transmission throttle control lever forward, against stop. Block
choke open and release fast idle cam.
2) On carburetors equipped with throttle operated solenoid
valve, turn key to "ON" position to energize solenoid. Open throttle
halfway to allow solenoid to lock. Return throttle to idle position.
3) Loosen retaining bolt on throttle control adjusting link.
DO NOT remove spring clip or nylon washer. Pull on end of link to
eliminate lash. Tighten link retaining bolt. Reconnect throttle
control rod spring.
727 Transmission with V8 engines
1) Disconnect throttle control rod spring. Use spring to
hold transmission throttle valve control lever against forward stop.
Block choke open and release fast idle cam.
2) On carburetors equipped with throttle operated solenoid
valve, turn key to "ON" position to energize solenoid. Open throttle
halfway to allow solenoid to lock. Return throttle to idle position.
3) Loosen retaining bolt on throttle control rod adjusting
link. Remove spring clip and slide nylon washer to rear of link. Push
on end of link to eliminate lash and tighten retaining bolt. Install
nylon washer and spring clip. Reconnect throttle control rod spring.
904 Transmission with 6-Cylinder Engines
1) Remove air cleaner. Hold throttle control lever rearward
against its stop. Block choke plate open and set carburetor linkage
completely off fast idle cam.
2) Unlock throttle control cable by lifting "T" shaped
adjuster clamp with small screwdriver. Move cable outer sheath
forward to remove any cable load on throttle cable bellcrank.
3) Adjust cable by moving cable and sheath rearward until
there is no lash between cable and throttle linkage. Lock cable by
pressing "T" shaped clamp downward until clamp snaps into place.
Install and reconnect any parts removed and/or disconnected.
999 Transmission with 4-Cylinder Engines
1) Raise vehicle. Using a spring, hook one end on throttle
control lever and other end on torque converter housing. Lower
vehicle.
2) Disconnect the ISA motor and connect Exerciser Box to
ISA. Adjustment light should turn off and ready light should turn on.
Press retrack button. Wait until ISA adjusts, ready light goes off
and adjust light goes on.
Page 1218 of 1378
3) Loosen bolt on throttle control link. Pull on link end to
eliminate lash. Tighten adjusting bolt. Press extend button on
Exerciser Box. When ISA retracts, release button and disconnect
Exerciser Box. Connect ISA wiring and remove spring from throttle
control lever. Install and reconnect any parts removed and/or
disconnected.
999 Transmission with 6-Cylinder Engines
1) Disconnect throttle control rod spring. Use spring to
hold adjusting link in forward position, against nylon washer. Block
choke open and release fast idle cam.
2) Raise vehicle. Loosen both retaining bolts on adjusting
link clamp. DO NOT remove spring clip or nylon washer. Use a spare
spring to hold transmission throttle lever against forward stop.
3) Push adjusting link to eliminate lash and pull clamp to
rear so that bolt in rod bottoms in rear of slot in rod. Tighten
forward clamp retaining bolt.
4) Pull throttle control rod to the rear so that bolt in
rod bottoms in front of slot and tighten rear retaining bolt. Remove
spare spring. Lower vehicle and reconnect throttle control rod spring.
AW-4 Transmission with All Engines
1) With ignition off, retract cable self-adjusting mechanism
fully. Press cable button down and push cable plunger inward.
2) Rotate throttle lever to wide open throttle position.
While holding throttle lever in position, allow cable plunger to
extend. When plunger is fully extended, release throttle lever. Cable
is now adjusted.
SHIFT LINKAGE
Cable Linkage
1) Place gearshift lever in "P" position and raise vehicle.
Using a small screwdriver, unlock shift control cable by releasing
U-shaped cable adjuster clamp. Remove cable from mounting bracket.
2) Move transmission shift lever rearward until fully
seated into "P" detent. Ensure that driveshaft cannot be rotated.
Snap control cable into cable mounting bracket and replace U-shaped
cable adjuster clamp.
3) Lower vehicle and verify engine starting. Engine should
start only with shifter in "P" or "N" position.
Rod Linkage
1) Loosen shift rod trunnion jam nuts at transmission lever.
Remove shift rod-to-bellcrank lock pin. Disengage trunnion and shift
rod. Place selector lever in "P" position and lock steering column.
Move transmission shift lever to full rear Park position.
2) Adjust shift rod trunnion to obtain free pin fit in
bellcrank arm. Tighten jam nuts. On vehicles with shift lever on
column, make sure linkage lash is eliminated by pulling down on shift
rod and pushing up on outer bellcrank when tightening jam nuts.
3) Check steering column lock for ease of operation. Ensure
engine starts in "N" or "P", only. If starter engages in any drive
gear, or does not work in "N" or "P", check for proper shift linkage
adjustment or faulty neutral safety switch.
NEUTRAL SAFETY SWITCH
1) Switch combines functions of neutral safety switch and
back-up light switch. With transmission linkage properly adjusted,
switch should allow starter operation in "P" and "N" only.
2) To test switch, remove wire connector and test for
continuity between center pin of switch and case. Continuity should
Page 1233 of 1378
sluggish See DISC BRAKES or
BRAKE SYSTEM
Master cylinder piston
stuck See MASTER CYLINDERS
or BRAKE SYSTEM
Brake fade due to incorrect
pads for linings Replace pads or linings
Linings or pads glazed Replace pads or linings
Worn drums Reface or replace drums
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Excessive Pedal
Travel Partial brake system failure Check fluid and pipes
Insufficient fluid in
master cylinder See MASTER CYLINDERS or
BRAKE SYSTEM
Air trapped in system See BRAKE BLEEDING or
BRAKE SYSTEM
Rear brakes not adjusted See Adjustments in DRUM
BRAKES or BRAKE SYSTEM
Bent shoe or lining See DRUM BRAKES or
BRAKE SYSTEM
Plugged master cylinder cap See MASTER CYLINDERS
or BRAKE SYSTEM
Improper brake fluid Replace brake fluid
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Pedal Travel
Decreasing Compensating port plugged See MASTER CYLINDERS
or BRAKE SYSTEM
Swollen cup in master
cylinder See MASTER CYLINDERS
or BRAKE SYSTEM
Master cylinder piston
not returning See MASTER CYLINDERS
or BRAKE SYSTEM
Weak shoe retracting springs See DRUM BRAKES
BRAKE SYSTEM
Wheel cylinder piston
sticking See DRUM BRAKES or
BRAKE SYSTEM
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Dragging
Brakes Master cylinder pistons
not returning See MASTER CYLINDERS
BRAKE SYSTEM
Restricted brake lines
or hoses Check line routing
Incorrect parking brake
adjustment See DRUM BRAKES
BRAKE SYSTEM
Page 1235 of 1378
Water Pump Malfunction Replace Water Pump
Fan Clutch Malfunction Replace Fan Clutch
Retarded Ignition Timing Reset Ignition Timing
Cooling Fan Malfunction Test Cooling Fan/
Circuit
Cooling Fan Motor
Malfunction Test Fan Motor
Cooling Fan Relay
Malfunction Test Fan Relay
Faulty Radiator Cap Replace Radiator Cap
Broken/Slipping Fan Belt Replace Fan Belt
Restricted Exhaust Repair Exhaust System
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Corrosion Impurities In Coolant Clean/Flush System \
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Coolant Leakage Damaged hose Replace Hose
Leaky Water Pump Replace Water Pump
Damaged Radiator Seam Replace/Repair Radiator
Leaky Thermostat Cover Replace Thermostat
Cover
Cylinder Head Problem Check Head/Head Gasket
Leaky Freeze Plugs Replace Freeze Plugs
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Recovery System Inoperative
Loose and/or Defective
Radiator Cap Replace Radiator Cap
Overflow Tube Clogged
and/or Leaking Repair Tube
Recovery Bottle Vent
Restricted Clean Vent
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No Heater Core Flow
Collapsed Heater Hose Replace Heater Hose
Plugged Heater Core Clean/Replace Heater
Core
Faulty Heater Valve Replace Heater Valve
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GASOLINE ENGINE - MECHANICAL TROUBLE SHOOTING
NOTE: This is GENERAL information. This article is not intended
to be specific to any unique situation or individual vehicle
configuration. The purpose of this Trouble Shooting
information is to provide a list of common causes to
problem symptoms. For model-specific Trouble Shooting,
refer to SUBJECT, DIAGNOSTIC, or TESTING articles available
Page 1238 of 1378
Excessive Oil Worn valve stems or guides Replace stems or
Consumption guides, See ENGINES
Valve "O" ring seals Replace "O" ring seals,
damaged See ENGINES
Plugged oil drain back holes Remove restrictions
Improper PCV valve Replace PCV valve
operation
Engine oil level too high Remove excess oil
Engine oil too thin Replace thicker oil
Valve stem oil deflectors Replace oil deflectors
damaged
Incorrect piston rings Replace piston rings,
See ENGINES
Piston ring gaps not Reinstall piston rings,
staggered See ENGINES
Insufficient piston ring Replace rings, See
tension ENGINES
Piston ring grooves or oil Replace piston rings,
return slots clogged See ENGINES
Piston rings sticking in Replace piston rings,
grooves See ENGINES
Piston ring grooves Replace piston and
excessively worn rings, See ENGINES
Compression rings installed Replace compression
upside down rings correctly, See
ENGINES
Worn or scored cylinder Rebore cylinders or
walls replace block
Mismatched oil ring Replace oil ring
expander and rail expander and rail, See
ENGINES
Intake gasket dowels too Replace intake gasket
long dowels
Excessive main or connecting Replace main or
rod bearing clearance connecting rod
bearings, See ENGINES
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No Oil Pressure Low oil level Add oil to proper level
Oil pressure sender or Replace sender or gauge
gauge broken
Oil pump malfunction Remove and overhaul oil
pump, See ENGINES
Oil pressure relief valve Remove and reinstall
sticking valve
Oil pump passages blocked Overhaul oil pump, See
ENGINES
Oil pickup screen or tube remove restriction
blocked
Loose oil inlet tube Tighten oil inlet tube
Loose camshaft bearings Replace camshaft
bearings, See ENGINES
Internal leakage at oil Replace block or
passages cylinder head
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Low Oil Pressure Low engine oil level Add oil to proper level
Engine oil too thin Remove and replace with
thicker oil
Excessive oil pump Reduce oil pump
clearance clearance, See ENGINES
Oil pickup tube or screen Remove restrictions
blocked
Main, rod or cam bearing Replace bearing to
clearance excessive reduce clearance, See
Page 1240 of 1378
Missing valve lock Install new valve lock
Excessively worn camshaft Replace camshaft, See
lobes ENGINES
Plugged valve lifter oil Eliminate restriction
holes or replace lifter
Faulty valve lifter check Replace lifter check
ball ball, See ENGINES
Rocker arm nut installed Remove and reinstall
upside down correctly
Valve lifter incorrect for Remove and replace
engine valve lifters
Faulty push rod seat or Replace plunger or push
lifter plunger rod
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Noisy Valves Improper valve lash Re-adjust valve lash,
See ENGINES
Worn or dirty valve lifters Clean and/or replace
lifters
Worn valve guides Replace valve guides,
See ENGINES
Excessive valve seat or Reface seats or valve
face run-out face
Worn camshaft lobes Replace camshaft, See
ENGINES
Loose rocker arm studs Re-tighten rocker arm
studs, See ENGINES
Bent push rods Replace push rods, See
ENGINES
Broken valve springs Replace valve springs,
See ENGINES
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Burned,Sticking Weak valve springs or Replace valves and/or
or Broken Valves warped valves springs, See ENGINES
Improper lifter clearance Re-adjust clearance or
replace lifters
Worn guides or improper Replace valve guides,
guide clearance See ENGINES
Out-of-round valve seats Re-grind valve seats
or improper seat width
Gum deposits on valve Remove deposits
stems, seats or guides
Improper spark timing Re-adjust spark timing
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Broken Undersize pistons Replace with larger
Pistons/Rings pistons, See ENGINES
Wrong piston rings Replace with correct
rings, See ENGINES
Out-of-round cylinder bore Re-bore cylinder bore
Improper connecting rod Remove and realign
alignment connecting rods
Excessively worn ring Replace pistons, See
grooves ENGINES
Improperly assembled Re-assemble pin-to
piston pins -piston, See ENGINES
Insufficient ring gap Install new rings, See
clearance ENGINES
Engine overheating Check cooling system
Incorrect ignition timing Re-adjust ignition
timing, See TUNE-UP
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Excessive Leaks at manifold to Replace manifold or
Exhaust Noise head, or to pipe pipe gasket
Exhaust manifold Replace exhaust