I have a quick question for the experienced Jeepers... I have an 88 wrangler with the 231 t case that is shot..making lots of bearing racket.. I found a cheap t case from an 01 XJ.. its the 242.. I don't do much big mudding or mistreating my Jeep.. Is the 242 from this newer model a direct swap? My Jeep is automatic with the 258 and vacuum disconnect front end.. this guy said the xj was auto with the 4.0.. any help would be appreciated!