4l80e no workie----Trans or converter?
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If the pump or converter was the issue then checking fluid would yield fluid high up the stick. I Put the sonnax self regulating boost valve, and sonnax pressure regulator valve. Only thing i can think of is somehow the snap ring blew out on the boost valve sending all of it into the pan. I would have no clue why or how it made it down the street if it wasnt seated or the valve wasnt in correctly though??