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

Countershaft Sensor: Service and Repair

Countershaft Speed Sensor Replacement





1. Disconnect the countershaft speed sensor connector, and remove the countershaft speed sensor.
2. Install the new O-ring (A) on the new countershaft speed sensor (B), then install the countershaft speed sensor in the transmission housing.
3. Check the connector for rust, dirt, or oil, and clean if necessary, then connect the connector securely.