For Jeeps of that vintage there are three drive system options
This is for automatic shift only;, Stick shift I did not read the limits on:
One is Rear Wheel Drive: May not be towed 4 down
4WD has two different transfer cases,, I forget how to tell them apart
one can not be towed 4 down (sorry).
The other, can be towed 4 down UNLESS, you have locking hubs on the front and they are not locked (With manual locking hubs, locked, it can be towed 4 down, with straight hubs it can be towed 4 down, but with automatic locking hubs or manual, not locked, it can not be towed 4 down)
To tow, place transfer case in neutral. Leave ignition in the OFF but not locked position so wheel can turn.. That's about all there is to it..
Do not forget a towed brake system (Ready brake, M&G, US-Gear, avoid the pedal pushing boxes in the driver's seat) and tow lights.
Home is where I park it!