They're both 23 spline, so you'll be good to go. AW4s were 21 spline from 87 to mid 89ish, then they went 23 and remained that way.
The only thing that I think might be a problem is if the slip yoke is different on them. Later models had a retarded boot system with grease in it, earlier ones were just lubed with ATF from the tcase. I don't know when it changed.
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