School bus transmissions have been like this for over 25 years. They’re all built with 6 gears but if you only want 5 gears (which is ironically is all most school districts actually want) they just disable 6th gear. It used to be that there was a little bit of missing hardware (which could be added later for a considerable price) but now it’s just disabled in software. In the skoolie community (people like me who buy used buses and convert them to motorhomes) you can get your software-disabled transmission upgraded to a six-speed for a few hundred bucks (dubious legality but who gives a fuck).
School bus transmissions have been like this for over 25 years. They’re all built with 6 gears but if you only want 5 gears (which is ironically is all most school districts actually want) they just disable 6th gear. It used to be that there was a little bit of missing hardware (which could be added later for a considerable price) but now it’s just disabled in software. In the skoolie community (people like me who buy used buses and convert them to motorhomes) you can get your software-disabled transmission upgraded to a six-speed for a few hundred bucks (dubious legality but who gives a fuck).