Correct. We dumped the trans controller and used the functionality in the ECM/PCM. You need to add the correct pins and harness to the ECM to interface it all correctly.
We didn't use the trans controller - because we used that space (63 coupe vette - little space to start with) for push-button trans shifter in the center console and the Shifter Control Module went in the trans controller's space.
We purchased the 4L85E trans and interface cables/pins from Street and Performance and they reflashed the ECM for use to operate it behind an LS2.
Jim
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