The only things monitored/controlled by the ecm for the transmission are the vehicle speed sensor (VSS) singal, torque converter clutch (TCC) lock up and what gear your in at any given time which is to helps determine if the TCC will engage because it will only come on in 4th gear, sometimes 3rd, depending on the setup. All most all of the ecm's functions are to monitor and control the engine. Shifting is done via internal transmission components in conjuction with the throttle valve (TV) cable. These inputs can be mimicked to use the trans as a stand alone unit without needing to involve anything for engine control/monitoring.
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