Your fluid levels are all ok? Have you done anything to the VX in the way of repairs or mods recently? Can you get it inside a heated garage for a day and let it thaw out. Maybe some snow got packed into something electrical and is causing a low resistance across some wiring.
Tod is supposed to electrically engage the clutch pack, the bad news is that 4 lo is supposed to provide a mechanical connection.
Can you get it up on 4 jackstands and test it no-load or see if the front shaft is turning?