2000 to 2004 Jeep TJ and 2000 to 2001 XJ. The XJ was available with 2WD. I personally would leave the 3550 in a Jeep. You'll never find a clean unit as the Jeep guys are scavengers to the last. Also the front bearing retainer is made for an external slave cylinder unlike the GM AR5 bell which only supports internal. You'd have to fab your own solution.
You can also mix and match extension housings (not 3550) around or rear output shafts depending on your level of comfort. My application used an AR5 to Ax15 extension housing to retain my NP 231J transfer case.
Lots of possibilities with these AISIN's.
