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Flat towing a Jeep is easy as long.as you can put the transfer case in Neutral. This doesn't apply to your CJ5 but some models have a pushbutton transfer case selector that doesn't allow the transfer case to go into neutral. A floor mounted lever does allow the transfer case to be put in neutral.
Put the transfer case in Neutral, transmission in gear if it's a manual, in Park if it's an automatic. The idea is to keep the engine and transmission from turning while the Jeep is being towed.
Don't forget to add a braking system to the Jeep. It's heavy enough to require brakes in most states along with and a breakaway system that will apply the brakes if it comes loose from the tow vehicle.