When driving at normal speed, once vehicle has stopped for stop light it begins to shake badly.also when in park it shakes, the motor seems to be rattled by standing still. we carried it back to the dealer for service it still has the same issue with the shaking.on city streets. if stop for light it shakes. we had the vehicle since november of 2015, aren't able to drive it much because of the shaking. afraid to drive ,feel unsafe for road travel. shakes with a loud noise, such as rattling noise, or vibration. has continued for as long as we've had the expedition.