Shimmy, shake or vibration
Since the problems in suspension, wheels and tires involve several systems, they must all be considered when diagnosing a complaint. To avoid using the wrong symptom, always road test the vehicle first.
Proceed with the following preliminary inspection and correct any defects which are found.
1) Inspect tires for proper pressure and uneven wear.
2) Raise vehicle on a hoist and inspect front and rear suspension for loose or damaged parts.
3) Spin front wheels. Inspect for out-of-round tires, out-of-balance tires, bent rims, loose and/or rough wheel bearings.
Condition Possible Cause Action
Shimmy, shake or vibration
Tire or wheel out of balance
Balance wheels or replace tire and/or wheel.
Loosen wheel bearings
Replace wheel bearing.
Loosen wheel hub nuts
Worn tie-rod ends
Replace tie-rod end.
Worn kingpin bearings or kingpin
Replace kingpin bearing and/or kingpin.
Excessive wheel runout
Repair or replace wheel and/or tire.
Blister or bump on tire
Replace tire.
Excessively loaded radial runout of tire / wheel assembly
Replace tire or wheel.
Disturbed front wheel alignment
Check and adjust wheel alignment.
Loose or worn steering linkage
Tighten or replace steering linkage.
Loose steering gear box bolts
Tighten box bolts.
Worn steering knuckle oil seal