MYY & MZZ Transmission-16 INDEX-BALL TYPE SYNCHRONIZER Operation 1. Index-Ball 2. Sleeve 3. Block Ring 4. Synchronizer Cone 5. Index-Spring 6. Index-Block 7. Index 8 Synchronization 9. Gear Selected Triple Cone Type 1. Synchronizer Cone 2. Index-Spring 3. Block Ring 4. Index-Ball 5. Sleeve 6. Index-Block 7. Outside Ring 8. Inside Ring Index-ball type synchronizer is adopted at 1st, 2nd, 3rd (triple cone) and reverse (single cone). In comparison with insert key type, gear select controllability is improved due to low resistance during sleeve is moving (gear is selecting). (Insert key type generates moving resistance between side of insert and block ring.)