I've got an AX15 5spd and an NP231J out of a 92 Jeep YJ. Both functional, the ATF from the tcase is red and clear, the gear oil from the AX15 shows some bronze, but I'd expect that after the better part of 150,000 miles.

$300 for the NP231J.
$200 for the AX15.
$400 for both.

Located in the Chicago area. These will not be shipped. I'll deliver them in the Chicago area.