Wouldn't a 92 be OBDI and a 96 OBDII? I'm thinking it should work, but would throw a check engine light with a P0700 code. I'm not positive on the connector, but I think that didn't change until 97/98.
I'm home wih the flu, so the brain's a little fuzzy right now.
-Chris
I'm not sure. 96 is a bastard year as you know, it's got the old style TCU, transmission, NSS, and wiring harness but is OBDII... I think it'll be fine. MIGHT set a CEL.
Since it's going in a ZJ anyways, all bets are off. The PCM on the ZJ controls the stock transmission and probably won't be happy about not being able to do its thing anymore, and I don't have enough experience with the ZJ electronics to tell if it will set a CEL because of it or not. Any 91-96 XJ TCU will work with any 87-97 AW4 for the purposes of this swap though. Go any later than a 96 TCU and you'll definitely get some CELs (if you hook the TCU CCD bus up to the ZJ CCD bus, you don't have to and I probably wouldn't) and the 98 and later AW4s have a different ISS/OSS setup, but any of the others are fair game as long as you can manage to bolt it all up / the spline counts match, etc.
Another thing I might worry about is the shifter cable setup and the flexplate, I am not sure if the bolt pattern for the AW4 torque converter is the same as the bolt pattern for the ZJ stock torque converter or not. If it is you're all set, if it isn't, you might have to do some redrilling or something, unless you can verify that the CPS slots in the ZJ stock flexplate are the same as the slots in the XJ 91-01 flexplate (which I would think they are, but can't guarantee.)
I'll do some parts catalog cross-ref checking in a bit and see if I can find anything else that might cause a problem.
edit: the flexplate is in fact different between the AW4 and the chryco auto for the ZJ. I can't tell you how different, but looking at pics on rockauto it doesn't look good. Both are 4 bolt but appear to be different hole diameters and possibly bolt circle diameter, and the chryco flexplate has 4 large holes punched in it in between them to either lighten the flexplate or (more likely) increase its flexibility. The 93 ZJ was available with the AW4 and uses the same flexplate as the XJ, so you may simply be able to bolt on an XJ flexplate, but I'm not entirely sure.