Its a 2000 i6 sport, 5spd, bought it 100% stock. Awhile back I had to have my transfer case rebuilt. I was told its an nv3550. Ok cool . . A few weeks ago I had to go to the jeep dealership for some parts and I was told it may have been a leftover ax15 that was put in and that it happened on a few early 2000 jeeps. Who am I supposed to believe?!