well i think i posted about this a couple months ago and i didnt have to many problems after i posted. but now it keeps happening. well i have a 1997 f250 with the e4od trans. the previous owner told me that the tranny was rebuilt stronger. but he had no reciepts to prove it. but i can tell you it has an ats purple converter in it. but thats all i know. well this is whats going on, usually what starts the problem is I will be cruzing down the highway and at any givin speed I can feel my converter unlock for about four seconds and then lock back in. then my o/d light starts flashing. which will shut off about 2 to 5 miles down the road. Then say I get off the highway after this happens and I come to a complete stop there is two things that will happen. First one is, I go to take off and it will shift into second at about 8mph then into third with the converter locking at about 18mph. So the truck has no power cause it is in such a high gear for how slow I am going. The second thing is it will try to shift into second but it will miss the gear and just rev like I'm in nutraul. so I have to pull it over and I will run the shifter through the gears. Go to take off again and it will hold first gear for a long time then just bang into second feeling like the whole trans just feel out . but it will shift fine after that. this hasen't happened for a while. usually it shifts really early. but i can come to a stop shut the truck off wait 5 seconds start it up and it will be fine. i did get my codes checked and there was only two codes in it. one was for a vehicle speed sensor, and the other one was for the crank shaft position sensor. i replaced the vehicle speed sensor but that did not help. sorry for the long post but i want to give as much info. i can to get this figured out. thanks for your guys help.