Transmission box does not work correctly

Well, friends I tell you, I have an automatic legacy legacy and the exchange box stopped working some time after a blister was burned on the board of the ampoule that burn was that of the direct one we replace it and nothing the question is that the car when putting the direct only passes three marches and not the 5 that correspond and when you reach the third march the engine rises from revolutions to up to 5000 Help with my problem please.