The AX-5 is a light duty 5-speed transmission.
It was used in all Jeep Wranglers, 1987-1989.
After mid 1989, the AX-5 has only been used in 4-Cyl Jeep Wranglers. Its usage is similar
in Jeep Cherokees XJ and Jeep Comanche MJ.
The AX-4 is a light duty 4-speed transmission. It was used in Jeep 1984-86 with 2.5L and 2.8L V6 engines.