sorry for taking so long to answer as I have being really busy (luckily enough on this bad economy)... ok I discarded to replace the transistor module and instead focused on simple stuff before moving deeper.
I checked all pins at control card for bad connections they checked good
I replaced key switch
I swapped traction motor
I replaced traction fuse
problem still persisting it does it at least 5 times in an 8 hour shift
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.