Just to add a little extra, I'm from the old school and always use the clutch. I can shift a Road Ranger actually smoother with the clutch than without. Every once in a while I would drive the truck without using the clutch and I wouldn't have any problems but really didn't like it.
The clutch with a brake is a new one to me. It seems like a truck having that kind of clutch needs to be shifted without the clutch. How new to the market is this type of clutch, as I have never heard of one. Is it's main purpose to prevent grinding when stopped and going from neutral to first?
Bill