I'm having a problem with a 06 fx4 5.4 liter I just bought. When i test drove it it ran great but today I noticed it seemed to be shifting funny from 2-3 and 3-4 on acceleration, like it was going into neutral. Well since the person I purchased it from said it had a transmission warranty on it I took it to the local dealer to just find out this has been an on going problem to the extent that its has had 3 new transmissions installed,they even removed the trans. from my truck and installed it into another truck where it performed perfectly,all the pressures checked out with no codes. They suggest trying a new PCM, so I'm trying to do some research before I spend another grand on it. I should also add that when you turn off the OD it shifts out fine. Any help would be greatly appreciated. I have found reman. pcm from a company on line but the dealer doesn't recommend using non-oem, of course this pcm is 700.00 cheaper.