The problem with hard transmission down shifting and locking from time to time started soon after I got the truck from dealer center, I would ask them to fix it every time I took the truck to be serviced and they would say that it was normal but that they would check it, needless to say they didn't fix it and the problem just has gotten worse. This is going to be my last Ford since it is not the only one of their vehicles I've had problems with. ( I guess when they say it is normal they mean that when we buy one of their trucks we should expect to have transmission problems and live with them)(F-150 XLT 4.6L V8, modified ToX 4.5mm)