Every time the Jeeps came with a THM400, a full-time Quadratrac transfercase was behind it. The Tcase took SPECIAL fluid, had some sort of torque converter in it, and had a chain drive. The THM400 output shaft was an odd Quadratrac-only deal, too.
Just take any everyday BOP transmission and put a 4x4 output shaft to match whatever Tcase you've got, the proper tranny-to-transfer adapter, and you're all set.
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Just as if I knew what I was doin'
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