I know for a fact the '97 J30 output shaft spline count is different than the '95-'96 J30. And both are 3x2 setup. I never actually counted, but my guess would be the '97 is a 30-spline. I pulled a VLSD from the junkyard on a '97 J30 and attempted to put the output shafts into an S14 VLSD and they would not go in.
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