Ok i have a 2004 F350. Problem started out with the Tow/haul light kicking on and going into limp mode. I just changed out the shift solenoid B like the error code was telling me. And i am still having the issue and its shifting hard into second. Anyone had this issue before? Truck only has 91 thousand miles on it and i had the transmission rebuilt at around 70 or so.

 

What is your transmission temperature gauge doing? I had a similar problem. Had to replace the transmission temperature sensor.

 

Thats the weird part. Its normal. Middle range sometimes a little low till it warms up.