ok heres the problem. I have a 2004 F-250 6.0 with a lift, AFE intake, and MBRP dual stack turbo back exhaust system everything else on the truck is stock no tuner. I have had this problem with the truck for about a year and a half now found out about it right after trucks transmission took a **** (i do not know if the truck had the issue before because i bought it 2 weeks earlier). I had the transmission replaced by Tanner Transmission in Ogden UT. Right after i had the transmission replaced i noticed the truck was reving while driving around the the speeds of 45-50 and 65-70. I took the truck back to tanner and had them check it out they found codes P0730 (incorrect gear ratio), P2700 (Transmission friction element A apply time range or performance) and P2701 (Transmission friction element B apply time range or performance). so they did some more trouble shooting and couldn't find anything else wrong so they decided to change out the transmission, and the wire harness. they reprogramed the computer and the problem went away until the trans had a hard shift then it started reving again. so i took it back to tanner and they couldn't find anything wrong with the trans so they decided to swap it out with a brand new transmission that has not been installed on a truck before, they put a brand new transmission computer in and reprogramed the computer again. then they took it to the Ford dealership in layton utah they did some more trouble shooting and kept driving it around and they said every time they started the truck up after letting it cool down overnight the transmission computer would lose its programing. so they told me the reason this could be happening is there could be some clogged injectors or a fried FICM. so tanner got the truck back and told me to get these fixed so i took the truck to Wild Diesel in West Haven Utah and they checked out my injectors and FICM they told me my injectors are good and my FICM is bad so i had to wait about a month to build up some money to get it swapped so today i took the truck to Quality Ford in Tooele Utah and had them swap the FICM (i had the old style 2 computer) they swapped it out and updated it to the 1 computer and reprogramed everything this time the truck ran great until it had another hard shift then the reving issue came back. so what i am asking is what the hell is my problem, has anyone had the same issue and what can i do to fix it?

 

how many miles have you put on it since the work was done, these trucks have to learn your driving style. After batterys have been disconnected you start over again, I think I have experienced what you are talking about, if you really get on it and let off it hits a couple times real hard,very hard, then you almost have to baby it for a while but after driving for a while it hasn't shown back up, only happened after batteries were disconnected.

 

i have put about 23,000 miles on the truck since i had the transmission replaced initially and every time i have had the truck fixed since then it lasts about 100 mile and the problem comes back i bought the truck with 123,000 and now it has about 146,000

 

has the speed sensor in the rear end ever been changed or cleaned, I've heard that they can make things act funny, having any problems with cruise control or anything else.

 

No problems with cruise control and I have not had the speed sensor in the back checked out

 

Have the batteries load tested first.

A FICM or injectors would have NOTHING to do with the transmission acting funny. That's ludicrous. I wont even get into how you spent a lot of un-needed money on a new Ford FICM.


I also can't help but wonder what trans fluid was used? These transmissions specifically called for Mercon SP, and now the Mercon LV.

Does the tow/haul light flash at all?
I think your best bet is try calling someone who actually knows and builds these transmissions. BTS (brians truck shop) would be a good one. Sounds like the revving is coming from the torque converter unlocking. Almost makes me think this shop WASN'T putting in a new trans and just telling you they were, but who knows.