FYI I've had a ZJ with AWD and u-joint in the D30. It was a LTD package with no trailer hitch package and 3.55s. My sister has the exact same jeep(year, V8, NP249 etc) except that hers has the trailer package, 3.73 diffs and CV shafts.
My offroader, also a 1993 LTD V8, came with the tow package, upcountry package, 3.73s diffs and CVs. You would think that of them all that one would have come with u-joints....