F1 code

[Jackpine]

Originally Posted by RedFX4

You lost me. All I know is that I get an F1 code when attempting to upload the custom tunes and that my gryphon reads a different HEX code. I'll put the canned tunes back on the gryphon tomorrow.

What I was saying there, is that the "version" number (the 5th character in the hex code) seems to be related to the region where the truck was sold (cold/hot climate, altitude taken into consideration), according to some research done by another truck owner. So, I'm puzzled why this had to change for you just because you got a new/rebuilt transmission?

Of course, my information source could be wrong. I just know the characters in the hex code DO identify the particular stock tune that is loaded.

- Jack