In the majority of autos, the synchromesh units usually are not fitted to all the gears. They are really equipped only on the best gears. Reverse equipment, and sometimes the initial gear, would not have synchromesh units. Because they are intended to be engaged if the vehicle is stationary. https://gearboxkeretaauto75307.isblog.net/new-step-by-step-map-for-gearbox-auto-49618870