marlow,
Just as everyone confirmed, the part#'s are different for the manual & the automatic. The giant label on the ECU will indicate if it's a manual tranny, or a automatic, thus the reason why I questioned as to what tranny you have.
One of the minor little differences, is the way the ECU controls the fuel management, when the tranny is shifting gears. Esp on the automatic. Thus one of the main reasons the ECU's are labeled differently & the different part numbers.