Doesn't do much good when the thread's topic doesn't have a resolution, now it does!
Would it be possible to take a freeze-frame or a few seconds worth of data from the TCU and send a loop of that data to the ECU to trick it into thinking that the car still has an automatic?
Would simply leaving the TCU plugged in and in place on the car be enough to get around this CEL business?
On a slightly related side note, has anyone ever converted an OBD2 car back to OBD1 ECU/wiring/TCU to get around these issues?