Originally Posted by JoeNova
They've always been PCM controlled (or at least TCM controlled).
No, I meant that 4L80Es were originally controlled by computers far more preventative than either the '98 or
'99+ PCM, therefore a modern PCM is not required for proper operation of the unit. People swap these (4L80Es) into older muscle cars all the time with separate controllers, so a PCM swap would not be needed (just a controller) if trans operation was the only concern. But, again, for a major FI build I understand the advantages of the swap.