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

Speedo Noise, Needle Waver, Erratic Servo Lock-In Performance


1. Speedometer cable kinked or defective.
2. Cable core bent or too long.
3. Cable connector loose at speedometer head, transmission or speed control servo.
4. Noisy speedometer head assembly.
5. Defective servo.