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What are manual transmission synchronizers?
How does a synchromesh transmission work?
What is synchronized transmission?
How does a synchro transmitter work?
A synchronizer, or "synchro," lets the collar and gear synchronize their speeds while they're already in contact but before the dog teeth engage. Each manufacturer's synchro is slightly different than the others, but the basic idea is the same. For instance, a cone on one gear will fit into a cone-shaped depression on the collar.