The transmission was replaced 2 years ago and the CEL came on at that time?
Since then the transmission has been replaced 3 times, the torque converter once and the engine computer replaced once?
As a result none of the above has made any difference, the CEL still come on after resetting?
Did one shop do all the work?
Has anyone checked the wiring between the trans and computer?
Was the original trans replaced with the correct one (as well as the others)?