[Gmecm] How does the ecm "know" if it is an auto or manual trans ?

[Phillip Kuhn]

I am curious about this as I dont see anywhere in the
editing software to program for an auto or manual
trans. I plan on using a $58 code in my 240sx and the
bin I downloaded is for a sy/ty which of course were
all autos. I still have yet to see anywhere at all to
"tell" the computer what type of trans the vehicle
has. I thought I knew a lot about GM cars and how they
worked as I was a GM tech for 6 years but lately I
have found that my knowledge was a lot more limited
than I thought. Of course over the last 6 years most
of the ecm's used for ecm conversions have long been
obsolete but I have still been under the hood of
plenty older cars. Anyhow if somebody could answer
that question for me I would greatly appreciate it.
Thanks,

Phil

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