I have a 9 speed in the dump truck and not having much experience driving big trucks was wondering how to put it in reverse in high range. Can you just let off the throttle for a second and flip the lever up while moving or can you start in high range? Sometimes I need to back up a ways. I have concluded that it's very hard to shift from granny low into to 1st while still moving. When you get on firmer ground you can stop and then start off in 1st. gear. Reverse I'm not sure how to get in high range.
Wind it up, preselect high range and double clutch the shift. If your engine takes a long time to slow down it's gonna be harder do do. Eaton doesn't recommend it, though. The other way either involves starting in high and slipping the clutch only if you're empty, or having a hill to help get rolling which is the least abusive way. The decal on the dash if it's still there will say not to change range while moving in reverse but doesn't say anything about using high in reverse. If you have two speed rears, low range and high in the tranny is a nice combination. When he works on logging roads and sometimes has to back up for hundreds of yards ten times a day, a guy figures this stuff out.