Turning off/Disabling Overdrive 4R70W

I'm looking to see if there is a way to turn off/disable overdrive by default on a 4R70W trans. I always just press the button on the shifter to disable, but would like to disable it by default if possible. It's a 2000 Mustang GT. I can provide my current tune file if needed.

I have not seen the tune for a 4r70 but it seems like you could just set the 3-4 shift table high so it never goes in OD.