Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Wheels and Tires: Testing and Inspection




NVH Troubleshooting Chart

Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.







x: Applicable

[A]: Refer to TIRES in this chart.

[B]: Refer to ROAD WHEEL in this chart.

[C]: Out-of-round

[D]: Imbalance

[E]: Incorrect tire pressure

[F]: Uneven tire wear

[G]: Deformation or damage

[H]: Non-uniformity

[I]: Incorrect tire size

[J]: FRONT AND REAR FINAL DRIVE

[K]: FRONT AXLE AND FRONT SUSPENSION

[L]: REAR AXLE AND REAR SUSPENSION

[M]: TIRES

[N]: ROAD WHEEL

[O]: BRAKE

[P]: STEERING