Originally Posted By: Trav
I would play it safe and leave it parked. If the lines are rusted a seep can turn into a blown out line any time same thing with a weeping o ring fitting or hose under pressure.
You probably wouldn't know it till it is too late.
You might have a walk-home, but probably won't hurt the trans. On a sudden loss of fluid you lose converter pressure and basically it just won't go anymore. Assuming it doesn't spray on the exhaust and catch on fire, which is pretty rare.