Quote Originally Posted by dave w View Post
There's been an evolution for custom flashing an ECM or PCM in the last two decades. Before the days of low cost DIY flashing, the software / hardware options for flashing an ECM or PCM were not budget friendly. Some of the older commercial software / hardware packages had limited options or more accurately stated underdefined definition files (nobody needs that stuff anyway). Commercial packages like EFI Live do not offer a "bit" to convert an automatic transmission calibration to a manual transmission calibration. EFI Live still supports gasoline engine tuning, but EFI Live has overwhelmingly embraced the diesel engine tuner as their preferred customer base. Commercial packages like HP Tuners have evolved since it's introduction to the marketplace. Some HP Tuners "bits" that used to be available (possibly emissions related bits) have been removed from the latest versions of HP Tuners.

dave w
Not sure I'm understanding the relevance of this. The bit is still there in in HP Tuners and has for the most part always has been. I'm stating that it is widely accepted by the hundreds of people that use that product regularly which includes me, all agree that is is there for identification purposes only and does not change a auto calibration to a manual. You have to either segment swap the calibration or start with a manual file. If it did I doubt GM engineering would populate the manual transmission calibrations with different segments. They would just flip the switch. I'm not here to argue with anyone, I'm just stating what I know and a very large tuning community on HP Tuners forum knows to be a fact.