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If i didnt want to do dual T-cases, is it possible to toss an NP231 on our (auto) trans without complication?

I can't speak for your transmission since it is a different model than mine, but I suspect it would be possible.

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As for the breaking of the rear D44, hey, i'll take that risk, i wont be crawling boulders or putting out mad torque from my SOHC 10:1 engine so im not too concerned, this vehicle gets driven in winter months only

Good luck with that.

'06 Dakota QC 4.7 6sp 4x4
'88 Mighty Max
'77 KZ1000 fun old bike