won't shift on 2003 Ford Taurus

I started my car and shifted into reverse but wouldn't go into gear. It won't go in any gear. Not had any problems with transmission, fluid was full. I had to have it have it towed. What could be the problem???

Asked by for the 2003 Ford Taurus
1 answer
either torque conveter or front pump failure. either way, the trans needs to be re built.