Before I had a 3rd party driveshaft disconnect Professionally installed I would crawl under my 2003 Ford Expedition with a 12mm wrench and disconnect the driveshaft. A bungee cord and a strap and I flat towed it from Colorado to Florida and a couple of shorter trips without any problems.
It wasn't an elegant solution but it worked fine and didn't harm the 2 wheel drive Expedition at all.
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