jimoshel Posted July 20, 2011 Posted July 20, 2011 Checked search with no results. '89 XJ, MJ, Will a 231 trans case swap between a standard and auto trans?
Geonovast Posted July 20, 2011 Posted July 20, 2011 That depends. If you're talking the BA 10/5, yes, they should. The AW-4 was still 21 spline at that point. If you're talking AX-15, no, it won't as the AX-15 was 23 spline. You can swap the input shafts, if the cases are from the same generation... the pitch on the reduction gears was changed a few times, not sure on when that happened. The AX-4/5 was 21 spline, but it used a long input on the T-case.
Garvin Posted July 20, 2011 Posted July 20, 2011 Mid '94 was the change in pitch. I used an early '94 NP242 input in my '90 NP231 transfer case without an issue.
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