2005 Ford Freestar vibrating

HI, While I am driving every once in a while my car will vibrate while I have my foot on the gas pedal. I cam confused as to what this could be. We replaced the torque converter last year could it be this? Or could it be something simple like a coil or mount? any ideas?

It would be helpful if you supplied a bit more information.

Is it speed sensitive? Does it feel like it is coming from the front or the back? Is it possible it is the road surface?

Info of this type will help sort this all out. Without it, we are just guessing - and there are a ton of possibilities.