Symptom Related Diagnostic Procedures

Symptom Chart

Crabbing

Possible Source(s):
^ Incorrect rear thrust angle.

Action(s) to take:
^ CHECK the rear toe adjustment.

Possible Source(s):
^ Front or rear suspension components.

Action(s) to take:
^ INSPECT the front and rear suspension systems. REPAIR or INSTALL new suspension components as necessary.

Possible Source(s):
^ Drive axle damaged.

Action(s) to take:
^ INSTALL a new rear drive axle/differential.

Drift/Pull

Possible Source(s):
^ Unequal tire pressure.

Action(s) to take:
^ CHECK and ADJUST the tire pressures. INSPECT the tire for excessive wear.

Possible Source(s):
^ Incorrect wheel alignment.

Action(s) to take:
^ CHECK and ADJUST the wheel alignment.

Possible Source(s):
^ Tires.

Action(s) to take:
^ CHECK and ADJUST the tire pressures. INSPECT the tire for excessive wear.

Possible Source(s):
^ Unevenly loaded or overloaded vehicle.

Action(s) to take:
^ NOTIFY the customer of incorrect vehicle loading.

Possible Source(s):
^ Damaged steering components.

Action(s) to take:
^ CHECK the steering system.

Possible Source(s):
^ Brake drag.

Action(s) to take:
^ CHECK the brakes.

Front Bottoming or Riding Low

Possible Source(s):
^ Coil springs.

Action(s) to take:
^ CHECK the ride height. INSTALL new springs as necessary.

Incorrect Tire Wear

Possible Source(s):
^ Incorrect tire pressure (rapid center rib or inner and outer edge wear).

Action(s) to take:
^ CHECK and ADJUST the tire pressure. INSPECT the tire for excessive wear.

Possible Source(s):
^ Excessive front or rear toe (rapid inner or outer edge wear).

Action(s) to take:
^ CHECK and ADJUST the wheel alignment.
Front Toe Adjustment

Possible Source(s):
^ Excessive negative or positive camber (rapid inner or outer edge wear).

Action(s) to take:
^ CHECK and ADJUST the wheel alignment.
Four-Wheel Alignment

Possible Source(s):
^ Tires out of balance (tires cupped or dished).

Action(s) to take:
^ BALANCE the tires.

Rough ride

Possible Source(s):
^ Spring(s)

Action(s) to take:
^ Check and install new spring(s) as necessary.

Possible Source(s):
^ Loose wheel nut(s).

Action(s) to take:
^ CHECK and TIGHTEN the wheel nuts to specification.

Possible Source(s):
^ Loose front suspension fasteners.

Action(s) to take:
^ CHECK and TIGHTEN the suspension fasteners to specification.

Possible Source(s):
^ Front wheel bearing(s).

Action(s) to take:
^ CHECK the wheel bearings.

Possible Source(s):
^ Worn or damaged suspension component bushing.

Action(s) to take:
^ CHECK and INSTALL new components as necessary.

Possible Source(s):
^ Wheel/tires.

Action(s) to take:
^ CHECK the wheels/tires. BALANCE or INSTALL new wheel/tires as necessary.

Possible Source(s):
^ Loose, worn or damaged ball joint(s).

Action(s) to take:
^ CHECK the Ball Joint(s).

Possible Source(s):
^ Loose, worn or damaged steering components.

Action(s) to take:
^ CHECK and INSTALL new components as necessary.

Possible Source(s):
^ Front wheel alignment.

Action(s) to take:
^ CHECK and ADJUST the wheel alignment.

Possible Source(s):
^ Shock absorber(s).

Action(s) to take:
^ CHECK and INSTALL new shock absorber(s) as necessary.

Possible Source(s):
^ Spring(s).

Action(s) to take:
^ CHECK and INSTALL new springs as necessary.

Poor self center action of the steering

Possible Source(s):
^ Ball joints.

Action(s) to take:
^ CHECK the Ball Joints.

Possible Source(s):
^ Steering components.

Action(s) to take:
^ CHECK and INSTALL new components as necessary.

Steering wheel off center

Possible Source(s):
^ Unequal front or rear toe settings.

Action(s) to take:
^ CHECK and ADJUST the wheel alignment.

Possible Source(s):
^ Steering components.

Action(s) to take:
^ CHECK and INSTALL new components as necessary.

Sway or roll

Possible Source(s):
^ Overloaded, unevenly or incorrectly loaded vehicle.

Action(s) to take:
^ NOTIFY the customer of incorrect vehicle loading.

Possible Source(s):
^ Loose wheel nut(s).

Action(s) to take:
^ CHECK and TIGHTEN the wheel nut(s) to specification.

Possible Source(s):
^ Coil spring(s).

Action(s) to take:
^ CHECK and INSTALL new coil springs as necessary.

Possible Source(s):
^ Loose front stabilizer bar or rear stabilizer bar.

Action(s) to take:
^ CHECK and TIGHTEN the stabilizer bar to specification.

Possible Source(s):
^ Worn lower suspension arm stabilizer bar insulators.

Action(s) to take:
^ INSTALL new lower suspension arm stabilizer bar as necessary.