Diagnosis Of Front Suspension - GMC G Service Manual

DIAGNOSIS OF FRONT SUSPENSION

Problem
Hard Steering 1.
2.
3.
Poor Directional 1.
Stability
2.
3.
4.
5.
6.
7.
Front Wheel Shimmy 1. Tire and wheel are out of balance or out of
(Smooth Road Shake)
2.
3.
4.
Vehicle Pulls to One 1.
Side (No Braking
Action)
2.
3.
4.
Noise in the Front 1.
End
2.
3.
4.
5.
6.
7.
8.
Wheel Tramp 1.
2.
3.
4.
Excessive or Uneven 1.
Tire Wear
2.
3.
4.
5.
Scuffed Tires 1.
2.
3.
4.
Cupped Tires 1.
2.
3.
4.
5.
Possible Cause
Ball joints and steering linkage need
lubrication.
Low or uneven front tire pressure.
Incorrect front wheel alignment (manual
steering).
Ball joints and steering linkage need
lubrication.
Low or uneven front or rear tire pressure.
Loose wheel bearings.
Incorrect front wheel alignment (caster).
Broken springs.
Malfunctioning shock absorber.
Broken stabilizer bar or a missing link.
round.
Worn or loose wheel bearings.
Worn ball joints.
Malfunctioning shock absorber.
Low or uneven tire pressure.
Front or rear brakes dragging.
Broken or sagging front spring.
Incorrect front wheel alignment (camber).
Ball joints and steering linkage need
lubrication.
Loose shock absorber or worn bushings.
Worn control arm bushings.
Worn or loose wheel bearings.
Loose stabilizer bar.
Loose wheel nuts.
Spring is improperly positioned.
Loose suspension bolts.
Tire and the wheel are out of balance.
Tire and the wheel are out of round.
Blister or bump on the tire.
Improper shock absorber action.
Underinflated or overinflated tires.
Improper toe-in.
Wheels are out of balance.
Hard driving.
Overloading the vehicle.
Toe-in is incorrect.
Excessive speed on turns.
Tires are improperly inflated.
Suspension arm is bent or twisted.
Front shock absorbers are defective.
Worn ball joints.
Wheel bearings are incorrectly adjusted or
worn.
Wheel and tire is out of balance.
Excessive tire or wheel runout.
FRONT SUSPENSION 3C-3
Correction
1. Lubricate the ball joints and linkage.
2. Inflate tires to the recommended pressure.
3. Check and align the front suspension.
1. Lubricate the ball joints and linkage.
2. Inflate tires to the recommended pressure.
3. Adjust the wheel bearings.
4. Check and align the front suspension.
5. Replace the springs.
6. Replace the shock absorber.
7. Replace the stabilizer bar or link.
1. Balance the tires, check run-out.
2. Adjust the wheel bearings.
3. Replace the ball joints.
4. Check and replace the shock absorber.
1. Inflate the tires to the recommended
pressure.
2. Adjust the brakes.
3. Replace the spring.
4. Check and align the front suspension.
1. Lubricate at the recommended intervals.
2. Tighten the bolts or replace the shock
absorber.
3. Replace the bushings.
4. Adjust or replace the wheel bearings.
5. Tighten all the stabilizer bar attachments.
6. Tighten the wheel nuts.
7. Reposition the spring.
8. Tighten to specifications or replace.
1. Balance the wheels.
2. Replace the tire.
3. Replace the tire.
4. Replace the shock absorber.
1. Inflate the tire to the recommended pressure.
2. Adjust toe-in setting.
3. Balance the wheels.
4. Follow proper driving techniques.
5. Do not exceed the maximum recommended
payload rating.
1. Adjust toe-in setting.
2. Follow proper driving techniques.
3. Inflate the tires to the recommended
pressure.
4. Replace the suspension arm.
1. Replace the shock absorbers.
2. Replace the ball joints.
3. Adjust or replace the wheel bearings (also
replace the races).
4. Balance the wheel and tire.
5. Check and compensate for runout.
GMTB-0843-2L