Quote Originally Posted by Fast355 View Post
I would have to look on the 03 file, but in my buddies 02 0411 HPTuners file it was as simple as flipping the switch in the transmission option tab from 4L80E to Non Computer Automatic and reflashing the entire PCM.
FYI changing that setting is for ID purposes only and Does Not change the OS to a Non Computer Automatic calibration or Manual Trans calibration which is what you should be running with a T400.