2008 Ford F250 King Ranch 6.4L- unable to change tire size

[Andysapp]

andy, the 6.4 has always written the tcm

thank you for the feedback, i made progress on the tire size issue only to be slammed by 6.0 and 4.7 stuff that needs to be tested and get out.

Don: Thanks for the reply. I missed one con: no cruise control.
Maybe I am reading wrong. I thought the TCM meant transmission control module & that meant I could actually modify the shift parameters. With the custom tune I can actually change the shift points. With the 80 HP tune on the 9R12 crom there is absolutely no change at all when I try to change the shift points and THAT is what I love about the custom tune and what I meant about including it in the next tune.

[ACDOCTOR]

HELLO DON.
I SEE YOUR STILL HAVING TROUBLE CHANGING TIRE SIZE. I DON'T KNOW IF YOU REMEMBER ME BUT I HAVE A 250 ALSO AND WE WERE TRYING TO CHANGE THE TIRE SIZE TO 37 INCH TIRES. HAVE YOU FOUND A WAY YET?

ROMAN