Its electric, i kinda like that first link you posted, but dam 85 bucks to change it a little bit i think its about 6 to 10mph slow as for the second option, i have not a clue what im looking for
1990 dodge W250 cummins 6 speed. 4in diamond eye, a turbo,and a pump Under construction...
The NV5600 affects nothing. The ratio box, as you well know, is attached to the t-case. Just suck it up and buy the ratio box at the 2nd link above. There's very few places that offer this stuff and their quality is as good as anyone else's.