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Home >> Lincoln >> 2005 >> Aviator AWD >> Repair and Diagnosis >> Suspension >> Wheel Alignment >> Suspension System-General Information >> Diagnosis And Testing >> Suspension System >> Symptom Chart >> Overview

Symptom Chart: Overview

SYMPTOM CHART

Condition Possible Sources Action
  • Dogtracking
  • Rear suspension components.
  • INSPECT the rear suspension system. REPAIR or INSTALL new suspension components as necessary. REFER to REAR SUSPENSION .
  • Drift/pull
  • Unequal tire pressure.
  • Caster total split is not within specification.
  • Camber total split is not within specification.
  • Tire forces.
  • Unevenly loaded or overloaded vehicle.
  • Steering components.
  • Brake drag.
  • ADJUST tire pressure.
  • CHECK the wheel alignment. ADJUST as necessary.
  • CHECK the wheel alignment. ADJUST as necessary.
  • ROTATE tires front to rear
  • NOTIFY the customer of incorrect vehicle loading.
  • REFER to STEERING SYSTEM-GENERAL INFORMATION .
  • REFER to FRONT DISC BRAKE .
  • Front bottoming or riding low
  • Incorrect springs.
  • Front shock absorber(s).
  • Incorrect tire wear
  • Incorrect tire pressure (rapid center rib or inner and outer edge wear).
  • Excessive front or rear toe (rapid inner or outer edge wear).
  • Excessive negative or positive camber (rapid inner or outer edge wear).
  • Front or rear suspension components.
  • Tires out of balance (tires cupped or dished).
  • ADJUST tire pressure.
  • CHECK the wheel alignment. ADJUST as necessary.
  • CHECK the wheel alignment. ADJUST as necessary.
  • INSPECT the front and rear suspension system. REPAIR or INSTALL new suspension components as necessary. REFER to FRONT SUSPENSION - 4X2 , FRONT SUSPENSION - 4X4 or REAR SUSPENSION .
  • BALANCE tires.
  • Rough ride
  • High tire pressure.
  • Shock absorber(s).
  • Spring(s).
  • Shimmy or wheel tramp
  • Loose wheel nut(s).
  • Loose front suspension fasteners.
  • Front wheel bearing.
  • Wheel or tire concerns.
  • Shock absorber(s).
  • Loose, worn or damaged ball joint(s).
  • Loose, worn or damaged steering components.
  • Front wheel alignment.
  • Sticky steering, poor returnability
  • Ball joints.
  • Steering components.
  • Caster out of specification.
  • Steering wheel off-center
  • Unequal front toe setting (side-to-side).
  • Steering components.
  • Sway or roll
  • Overloaded, unevenly or incorrectly loaded vehicle.
  • Loose wheel nut(s).
  • Shock absorber(s).
  • Loose stabilizer bracket-to-frame bolts.
  • Worn bar bushings or links.
  • Worn spring(s)
  • Vehicle leans to one side
  • Unevenly loaded or overloaded vehicle.
  • Front or rear suspension components.
  • Spring(s).
  • Incorrect drive axle(s) ride height. Lateral tilt out of specification.
  • NOTIFY the customer of incorrect vehicle loading.
  • INSPECT the front and rear suspension systems. INSTALL new suspension components as necessary.
  • INSTALL new spring(s) as necessary. REFER to FRONT SUSPENSION - 4X2 , FRONT SUSPENSION - 4X4 or REAR SUSPENSION .
  • INSPECT the front and rear suspension systems. ADJUST, REPAIR or INSTALL new suspension components as necessary.
  • Vibration/noise
  • Tire and wheel concerns.
  • Wheel bearings.
  • Brake components.
  • Suspension components.
  • Steering components.
  • Wander
  • Unevenly loaded or overloaded vehicle.
  • Ball joint(s).
  • Loose, worn or damaged front wheel bearing(s).
  • Loose, worn or damaged suspension component(s).
  • Loose suspension fasteners.
  • Steering components.
  • Wheel alignment (excessive total front toe out).


SYMPTOM CHART

Condition Possible Sources Action
  • Tires show excess wear on edge of tread
  • Underinflated tires.
  • Vehicle overloaded.
  • High-speed cornering.
  • Incorrect wheel alignment.
  • Incorrect tire rotation intervals.
  • ADJUST air pressure in tires.
  • RETURN vehicle - NOTIFY customer of overloaded condition.
  • RETURN vehicle - NOTIFY customer of cause of condition.
  • CHECK the wheel alignment. ADJUST as necessary. REFER to CAMBER AND CASTER ADJUSTMENT .
  • ADVISE customer of condition. ROTATE tires.
  • Tires show excess wear in center of tread
  • Tires overinflated.
  • ADJUST air pressure.
  • Other excessive tire wear problems
  • Incorrect tire rotation intervals.
  • Incorrect tire pressure.
  • Loose or leaking shock absorbers.
  • Incorrect wheel alignment.
  • Loose, worn or damaged suspension components.
  • Wheel and tire assembly out of balance.
  • Excessive lateral or radial runout of wheel.
  • ADVISE customer of condition. ROTATE tires.
  • ADJUST pressure.
  • TIGHTEN or INSTALL new shock absorbers as necessary.
  • CHECK the wheel alignment. ADJUST as necessary. REFER to CAMBER AND CASTER ADJUSTMENT . INSPECT the front suspension and REPAIR or INSTALL new suspension components as necessary.
  • BALANCE wheel and tire assembly.
  • REFER to NOISE, VIBRATION & HARSHNESS .
  • Wobble or shimmy
  • Damaged wheel bearings.
  • Loose or damaged suspension components.
  • Bent wheel.
  • Damaged tire.
  • Loose wheel nuts.
  • REFER to NOISE, VIBRATION & HARSHNESS .
  • INSPECT the front suspension and REPAIR or INSTALL new suspension components as necessary.
  • INSTALL a new wheel as necessary.
  • INSTALL a new tire as necessary.
  • TIGHTEN the wheel nuts. REFER to WHEELS & TIRES .
  • High-speed shake
  • Wheel hub face/pilot/bolt circle runout.
  • Tires/wheels.
  • Wheel bearings.
  • Suspension/steering linkage.
  • Engine.
  • Transmission.
  • Brake discs/imbalance.
  • Vehicle vibration
  • Driveline - engine.
  • Tires.
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