Synchromesh unit (Manual Car Transmission) - How it works

This video explains the operation of a synchromesh unit in a typical manual transmission, detailing synchromesh (blocker/baulk ring) operation.
The Synchromesh AKA Constant Mesh gearbox is an improvement on the older sliding mesh gearbox which relied heavily on driver skill and double-clutching to not grind or crunch the gear change. The sliding mesh box was also known as a "crash box" due to the gears making lots of noise when changing.

The particular synchro unit used in this video is from a Land Rover LT77 manual gearbox but the information applies to most synchromesh manual shift transmissions in vehicles today. Synchro rings.

For the full video explanation of a manual transmission with synchromesh, see this video:    • Synchromesh Manual Transmission / Gea...  


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