I have a 01 f150 supercrew 5.4 it has the 4r70w trans. I left work today and it stuttered like it needed fuel then it just got worse. it was like my truck was running over rumble strips take my foot off the gas its smooth give alittle throttle it shakes. step on it it runs much better shift down to 2nd it runs better but OD at 1500 rpm it is horrible any ideas. it feels like the truck is bucking like in a manual that is in to high a gear.