Torque converter not unlocking (donation made)

Ok... what engine? and my software shows 2 transmissions, the Torq-shift and the 4R100.

Sorry 5.4 4R100

Sorry I was away all weekend and I was wondering if you could review my post again.
I would be extremely greatful.

I posted this a while ago and also made a donation, I also understand that everyone is very busy but there are people getting quicker replies than myself.
Was my donation too small?

[quote:c9c7ef3fe4="Rob R"]4766-2197-7096-7026
2003 F250SD auto trans 4x4 85,000 kilometres

I really hope someone can help me because I am becoming really frustrated with the dealers. and the tranny shops.
When I bought the truck at 65,000 km I was noticing the torque converter was coming in and out of lockup when I accelerate or de-celerate like it should up until 4 months ago (75000kms) It wants to lockup prematurely and won't come out of lockup when I accelerate at highway speeds resulting in a big loss of power. It won't even come out of lockup when I am cruising and I tap the brake pedal.
I am finding now that when I want to accelerate I have to release the gas pedal and go back to the 2/3 throttle position and the t.c will unlock only locking up prematurely again.
I have had 2 Ford dealers plug their diagnostic laptop tool and come up with no codes. These mechanics understand what I am talking about but can't find a solution because they have never heard of such a problem. (I think they're just brushing me off so that I can go away paying their 90.00 diagnostic fee)
Now I know that the torque converter itself actually works because I have seen it on their diagnostic tool.
It just needs to be told what to do. Oh and one mechanic actually replaced the TPS thinking that it was the problem but he was wrong...... he is also a friend therefore I give him an E for effort.
Can someone please help me as I will start pulling a 28 foot camping trailer this summer... oh and did I mention that I made a donation? LOL..

Please please please help me.... I know I am not dreaming this up![/quote:c9c7ef3fe4]

Did they check the TCC solenoid

There is 12v going to the solenoid when it unlocks which proves it works, it just needs to be told what to do and it is not when I accelerate.
The truck would stall at a stop if the tcc solenoid was intermittent or was not working at all.
Thanks for your reply.

[quote:e1a77355da="justanold"]HELLO! You have a good one here. i have only one thing to try. COMPLETE trans fluid replacement using a machine. after replacement drive it for 50 miles or so. clean trans fluid is a wonderful solvent and just may solve your problem. 8) 8) 8)[/quote:e1a77355da]

Is that you or your twin brother that runs california, you guys sure look alike. I was almost convinced.

Better tell the clown to find a better one lol.Tech's don't look like Warriors. LMAO.And Arnold is not with his lil brother Danny Devito