My aunt and uncle truck, so I know I knew this; but couldn’t quite remember the reason just now, so I there’s a link. Of course, I remember now, but the link’s easier. (I also knew just how many gears there were, but all I remember now is that there are a lot, I don’t remember the number. I do know, though, that many of them are low gears that are normally able to be skipped over, and are there for pinches.)