Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 62
REAR SUSPENSION
3D–19
AXIOM (Vehicles Produced After Aug./1/2001)
REAR SUSPENSION
CONTENTS
Service Precaution
3D–19
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General Description
3D–19
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Diagnosis
3D–20
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Coil Spring
3D–23
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Coil Spring and Associated Parts
3D–23
. . . . . . . .
Removal
3D–23
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Inspection and Repair
3D–24
. . . . . . . . . . . . . . . . . .
Installation
3D–24
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Shock Absorber
3D–25
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Shock Absorber and Associated Parts
3D–25
. . . .
Removal
3D–25
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Inspection and Repair
3D–25
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Installation
3D–25
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Trailing Link
3D–26
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Trailing Link and Associated Parts
3D–26
. . . . . . .
Removal
3D–26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
3D–26
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Installation
3D–27
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Upper Link
3D–28
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Upper Link and Associated Parts
3D–28
. . . . . . . .
Removal
3D–28
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Inspection and Repair
3D–28
. . . . . . . . . . . . . . . . . .
Installation
3D–29
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Lateral Rod
3D–30
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Lateral Rod and Associated Parts
3D–30
. . . . . . .
Removal
3D–30
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Inspection and Repair
3D–30
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Installation
3D–31
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Stabilizer Bar
3D–32
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Stabilizer Bar and Associated Parts
3D–32
. . . . . .
Removal
3D–32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
3D–32
. . . . . . . . . . . . . . . . . .
Installation
3D–33
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Main Data and Specifications
3D–34
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Special Tools
3D–36
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Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE
SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE
SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
General Description
The rear suspension is a 5-link, coil spring type
suspension with a stabilizer bar, consisting of two trailing
links, two upper links, lateral rod, shock absorber, and
stabilizer. In this suspension, the links are specially
arranged to enable the rear axle to move freely, thereby
expanding suspension stroke, reducing friction, and
improving lateral rigidity and roll control. All these result in
improved stability, riding comfort, and rough road
maneuverability.
Each link connects the axle housing with the frame
through a runner bushing. The axle housing is supported
by the trailing links and upper links longitudinally and by
the lateral rod latitudinally.
3D–20
REAR SUSPENSION
Diagnosis
Condition
Possible cause
Correction
Vehicle Pulls
Mismatched or uneven tires.
Replace tire.
Tires not adequately inflated.
Adjust tire pressure.
Broken or sagging springs.
Replace spring.
Radial tire lateral force.
Replace tire.
Improper wheel alignment.
Adjust wheel alignment.
Brake dragging in one wheel.
Repair brake.
Loose, bent or broken front or rear
suspension parts.
Tighten or replace the appropriate
suspension part(s).
Faulty shock absorbers.
Replace shock absorber.
Parts in power steering valve
defective.
Replace power steering unit.
Abnormal or Excessive Tire Wear
Sagging or broken spring.
Replace spring.
Tire out of balance.
Balance or replace tire.
Improper wheel alignment.
Check front end alignment.
Faulty shock absorber.
Replace shock absorber.
Hard driving.
Replace tire.
Overloaded vehicle.
Replace tire and reduce load.
Tires not rotated periodically.
Replace or rotate tire.
Worn or loose road wheel bearings.
Replace wheel bearing.
Wobbly wheel or tires.
Replace wheel or tire.
Tires not adequately inflated.
Adjust the pressure.
Wheel Hop
Blister or bump on tire.
Replace tire.
Improper shock absorber operation.
Replace shock absorber.
Shimmy, Shake or Vibration
Tire or wheel out of balance.
Balance wheels or replace tire/or
wheel.
Loose wheel bearings.
Replace wheel bearing.
Worn steering linkage ball joints.
Replace ball joints.
Worn upper or lower end ball joints.
Replace ball joints.
Excessive wheel runout.
Repair or replace wheel and/or tire.
Blister or bump on tire.
Replace tire.
Excessive loaded radial runout of
tire/wheel assembly.
Replace tire or wheel.
Improper wheel alignment.
Check wheel alignment.
Loose or worn steering linkage.
Tighten or replace steering linkage.
Loose steering unit.
Tighten steering unit.
Tires not adequately inflated.
Adjust tire pressure.
Loose, bent or broken front or rear
suspension parts.
Tighten or replace the appropriate
suspension parts.
Faulty shock absorber.
Replace shock absorber.
Hub bearing preload misadjustment.
Adjust preload.
Parts in power steering valve
defective.
Replace power steering unit.
REAR SUSPENSION
3D–21
Condition
Correction
Possible cause
Hard Steering
Bind in steering linkage ball studs,
upper or lower ball joint.
Replace ball joint.
Improper wheel alignment.
Check wheel alignment.
Tire not adequately inflated.
Inflate tires to proper pressure.
Bind in steering column or shaft.
Repair or replace.
Improper power steering system
operation.
Repair or replace. Refer to
Steering
section.
Too Much Play In Steering
Wheel bearings worn.
Replace wheel bearings.
Loose steering unit or linkage.
Retighten or repair.
Worn or loose steering shaft
universal joint.
Retighten or replace steering shaft.
Worn steering linkage ball joints.
Replace ball joints.
Worn upper or lower end ball joints.
Replace ball joints.
Poor Steering Wheel Returnability
Bind in steering linkage ball joints.
Replace ball joints.
Bind in upper or lower ball joints.
Replace ball joints.
Bind in steering column and shaft.
Repair or replace.
Bind in steering gear.
Check and repair steering gear.
Improper wheel alignment.
Adjust wheel alignment.
Tires not adequately inflated.
Adjust pressure.
Loose steering wheel nut.
Retighten.
Worn wheel bearing.
Replace.
Misassemble Transfer Gear ASM
Reassemble Transfer Gear to proper
portion
Abnormal Noise
Worn, sticky or loose upper or lower
ball joint, steering linkage ball joints
or drive axle joints.
Replace.
Faulty shock absorbers.
Replace.
Worn upper or lower control arm
bushing.
Replace.
Loose stabilizer bar.
Retighten bolts or replace bushings.
Loose wheel nuts.
Tighten nuts. Check for elongated
wheel nut holes. Replace wheel if
required.
Loose suspension bolts or nuts.
Retighten suspension bolts or nuts.
Broken or otherwise damaged wheel
bearings.
Replace wheel bearing.
Broken suspension springs.
Replace spring.
Loose steering unit.
Retighten mounting bolt.
Faulty steering unit.
Replace steering unit.
Wandering or Poor Steering Stability
Mismatched or unevenly worn tires.
Replace tire or inflate tires to proper
pressure.
Loose steering linkage ball joints.
Replace ball joints.
Faulty shock absorbers.
Replace shock absorber.
Loose stabilizer bar.
Tighten or replace stabilizer bar or
bushings.
Broken or sagging springs.
Replace spring (pairs).
Improper wheel alignment.
Adjust wheel alignment.
3D–22
REAR SUSPENSION
Condition
Correction
Possible cause
Erratic Steering When Braking
Worn wheel bearings.
Replace wheel bearings.
Broken or sagging springs.
Replace spring (pairs).
Leaking caliper.
Repair or replace caliper.
Warped discs.
Replace brake disc.
Badly worn brake pads.
Replace brake pads.
Tires are inflated unequally.
Inflate tires to proper pressure.
Low or Uneven Trim Height
Broken or sagging springs.
Replace springs (In pairs).
Vehicle overloaded.
Reduce load.
Incorrect springs.
Adjust or replace torsion bar.
Trim Height out of spec
Adjust Trim height
Suspension Bottoms
Vehicle overloaded.
Reduce load.
Faulty shock absorber.
Replace shock absorber.
Incorrect, broken or sagging springs.
Replace springs.
Body Leans
Trim Height out of spec
Adjust Trim height
Loose stabilizer bar.
Tighten stabilizer bar bolts or replace
bushings.
Faulty shock absorber, struts or
mounting.
Replace shock absorber.
Broken or sagging springs.
Replace springs (In pairs).
Vehicle overloaded.
Reduce load.
Cupped Tires
Worn wheel bearings.
Replace wheel bearing.
Excessive tire or wheel run out.
Replace tire or wheel.
Worn ball joints.
Replace ball joints.
Tire out of balance.
Adjust tire balance.
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