Why am i not geetting engagement?

I have a 2006 Ford Escape 3.0L xlt. My truck is dead! jammed up the entire street when the tranny refused to go. No warning! it does not engage at all. I drained the oil, absolutely no particles. I pulled one of the lines to the cooler and its pumping fuel. I replaced the valve body. None has worked. Do you think a clogged filter can do this or should I suspect the torque converter? sometimes, if I rev it hard enough, I would get a little movement but not far and only on flat surfaces. What do you think? Tired of walking!!!!