Flashing Overdrive light...I scanned codes and got this

[NOVI FED COUPE]

So I scanned the codes and got a p0743-torque converter clutch system electrical failure and also got a p0741-torque conveter clutch circ. perf/stuck off. So I cleared the codes to see what would come back as I just bought the truck and didnt know what codes had been in there long. I cleared them and as soon as I turned the ignition back on the OD light was already flashing and I hadnt even cranked it up. So I plugged the scanner back in and got the P0743 again.

Any one familiar with this...if so where do I start??