Check Enging Light P0740

i got a 2000 Mazda 626 ESV6 engine the check engine light came on while i was driving a month ago i took it to the mechanic and he checked it with the computer and he said that the computer showed that ther was something wrong with the Torque Converter and it said that the Clutch Circuit/Open so the mechanic not knowing what it was all about said he was pretty sure its not a big problem cleared the check engine sign and now a month later the check engine sign is back and now so does anyone know whats all this about???

HELP ME OUTTT!!:banghead:

sorry to bring bad news but you need new tranny