Alright, I edited out the references to what drives the lubrication pumps. Unless your car can be "flat-towed", an automatic transmission will not receive proper lubrication and could prematurely fail, so the point still applies.
See the thread
Solution for coasting an automatic transmission: external oil pump http://ecomodder.com/forum/showthrea...pump-4149.html
But don't go to the trouble on a transmission that's been coasted extensively. It could already be near failure.