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)

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Transmission Speed Sensor: Service and Repair

Mainshaft/Countershaft Speed Sensor Replacement:




1. Remove the 6 mm bolt from the transmission housing and remove the mainshaft and countershaft speed sensors.
2. Replace the 0-ring with a new one before reassembling the mainshaft and countershaft speed sensors.