Bumping out of 2nd

Double M
I dont think you need to apologize at all. It was just semantics.
If you reread your post, you will notice the word syncro appear several times, and each time it is referring to a different thing. Now, us old-timers knew what you were talking about(most of us are 60+) . But to the OP you were clear as mud.
Perhaps MY words were harsh.
And for that, I apologize.

As for Rusty's response , I ,as well as others, assumed he was referring to the entire steel assembly between the two gears, possibly because thats the the way they were sold, back in the day. The brass rings were called stop-rings and were always offered separately.When I was a kid I went through several synchronizers(entire assys), before I figured out, that the parts guys loved to see me coming.I bought a hand-held grinder, and they never saw me again.That was about 1971.

Thanks for coming back.