sloid
based on the 804 views (as I write this) on this thread - i think there are a lot of people here who are interested in, but scratching their heads wondering, just what it is you are doing
as far as lowering gears in the gearbox - one answer is to not shift it into 5th (OD)
would it be possible for you to post up photographs of the buggy? this would in my opinion be very helpful
and just as an aside - what is the fastest speed you have taken the buggy to with the transfer case in low range (in other words - transfer in low range, tranny in 5th, engine redlined)
id almost be tempted to go back the other way on the axle gearing (4.11?) and put transfer in low range
or maybe go from 35's up to 37's or bigger, with transfer in low range (what is your engine redline?)