1994 Explorer 4x4 Automatic My daughter was returning from work lastnight and experienced a sudden trans failure. She said that when she pulled out onto the highway the trans shifted normally from 1 to 2 and from 2 to 3, but when it shifted into overdrive it suddenly popped and immediately she had no power going through the trans. She drifted to the side of the road and had to be towed home. The trans is totally dead. The fluid, which is about a year old, looks and smells fine. The engine starts and runs fine but the trans acts as if it is in neutral regardless of where the shifter is. Park does work to hold the vehicle as normal. What could have happened?