If the original NA ECU has a separate TCU then you are going to need to reroute wires that used to run between the trans and the TCU to the appropriate (1 to 1 equivalent) pins on the ECU. Other than that, it should work.
Look up posts by @Kinkstaah on the subject.
So the stagea was a series 2 neo det with tiptronic auto. (I have the transmission aswell) and has integrated tcu in the ecu. I'm hoping to use the entire stagea ecu, engine and auto harness.
Does the stagea have the gearbox control in ecu or separate controller?
A mate did this conversion and went a r34gtt ecu with Nistune and added a few resistors and diodes to ecu loom to give ecu a few fake signals and gearbox uses factory controller.
Old R34 +T thread
That setup has worked well but is all being removed for a Link plugin and 8hp50 conversion soon
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