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Old 01-10-2011, 11:27 AM   #6
special-K
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Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
Re: 4 wheel drive set up good or bad? sb400 700r4 4:11 gears

Sounds like it'll work ok. Your gears will be in the mid-lower 3s after your tires,so that'll work fine for street.O/D may be a bit tall. 4.56s would probably be best. The transmission can be built to take it. 700r4/NP208s are pretty common,then came the N241 in '89. There are 4L80E/NP241 combos from '91 3/4 Suburbans and CrewCab 3/4 & 1 tons. You want to get the electronic speedo stuff from the donor,too. I think the same for the 90/91 700r4/N241s.
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