I have noticed that when my gas tank is less then half full the car sometimes begins to shake, especially the steering wheel. I usally slow down a bit and it then stops. It happen about half the time. I recently replaced the in-tank pump. But this has not helped the problem. I has my mechanic check out the front suspension. He says everything is ok with the suspension. It's an annoying problem. Does anybody have any idea what couls be causing this occassional problem. Thanks, Neils