P074100 and p070600 codes

[JuliefLummox]

Hi all, my c5 rs6 runs fine with no problems or lights on dash however i used my scan tool to give it a check over and there were two stored codes for gearboxP074100 torque convertor clutch circ, performance or stuck offP070600 Transmission range sensor A circuit range / performance I had read about the dreaded P074100 so bit worried I've cleared codes and took it for a good spin and they have not returned. Does anyone have any ideas, on its way out?? Thanks

[JamesLawrance]

Range sensor fault is the F125 switch. And yeah, the torque converter code is mechanical failure