I heard a new term, new to me. Smash Box. It was used in context with a transmission.
So I’d like to ask the old timers.
What is a Smash Box?
You mean "slush box"?
It's slang for torque converter.
Perhaps I misheard it. Thank you!
You might mean "crash box". It's a term used to describe a manual transmission without synchronizers where you need to double-clutch in order to shift without "crashing" (grinding) the gears.
Transmission sychros were invented by Earl A. Thompson in 1918 and first used by Cadillac in 1928.
https://itstillruns.com/crash-gearbox-7577582.html
https://en.wikipedia.org/wiki/Earl_A._Thompson
That might be the term I heard! It was in the context of synchros. Thank you for the information. I have never tried one of these, it would be interesting to try, but I doubt I can get my hands on one seems it seems so obscure.