First: he will need tO get the correct part nuber of the ecm. You can pull the old one out if needed and check for a part mumber. Should be something like fotf-12a650-ata.

If that does not work, get on a ford truck forum and start digging around. There used to be oldfuelinjection.com that listed a ton of info but it looks like that site is no longer up.

Once you have the correct part number, ebay is your friend. Expect to pay ~$350. Might also call some
Wrecking yards

Its actually time for your buddy to Buy a service manual and go through the troubleshooting

Push Button Overdrive?

(E4OD)?

I assumed thats wat hes talking about and not an aod

It's an E4OD.