O/D light flashing and funney shifting tranny

[triumph406]

I had the error codes checked, the relevant error code (among others) is

P0743 Torque Converter Clutch System Electrical Failure

So it appears that there is a problem in the solenoid pack. I'm going to replace it, I don't any more problems with the tranny. I've checked all the electrical connections and there good.

[adfields]

That is what I thought, something locking the TC when it should be free. Don’t forget to drain the old nasty fluid from the TC and replace the filter while you’re under there. Even I get one right once in a while.