Not sure what you are asking, I meant its "bad" or not convenient that the transfercase gears don't affect High-range if you would like to run Big Rubber, cause gear reduction would help compensate for a huge loss in power that you would have with something like 33's.
I run 31's as well, on light Pro-Comp wheels, power wasn't down much, slightly noticeable. Would like bigger rubber though, once someone offers diff gears of the 5:83:1 variety.
Anyway, there are no options for gear ruduction on HI range unless you are somekind of a gear wizard and can fab your own, other options are there for different transfercase scenerios but Im not up on those.