Skool Me On Synchro Function?

The insides of the synchros not on the outside with the points but the inside has little ribs on it and those are the ones that feel closer and closer on the cone of the gear and get tighter and tighter and stop the gear..
If you put the synchro on his gear with some oil you can spend it on their lightly but if you push it down on there it will stop. It's kind of a pressure activated kind of deal. So if those ribs are worn out they won't have any bite and will not slow down the gear to synchronize..