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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Synchronizers Cleaning and Inspection


Synchronizers Cleaning and Inspection





1. Clean the synchronizer with clean solvent.
2. Air dry the components.
3. Inspect the synchronizer teeth for the following conditions:
^ Wear
^ Scuffing
^ Nicks
^ Burrs
^ Breaking

4. Inspect the keys or the springs for the following:
^ Wear
^ Cracks
^ Distortion If any of the following conditions exist, replace synchronizer.