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  1. S

    transfer case ?

    Are the imput shafts interchangable from the np 249 and the 231? I have a 249 of a 1997 grand with the 318 and the 231 is from a 90 with a 4.0. Want to put the 231 on the grand drivetrain. If my research is correct the 90 should be a 21 spline and the 249 should be a 23. Thanks.
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