Civic Sedan L4-1590cc 1.6L SOHC (D16A6) MFI (1990)
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Synchronizer Hub: Service and Repair
Synchro Sleeve and Hub Inspections
1. Inspect gear teeth on all synchro hubs and sleeves for rounded off corners, which indicates wear.
2. Install each hub in its mating sleeve and check for freedom of movement.
NOTE: If replacement is required, always replace the synchro sleeve and hub as a unit.