What a bummer mate, sorry 2 hear of having drama's with the box again

I do believe there is 2 maybe 3 temp senors, so one of the other ones may have failed

And yes been a 2nd hand sensor it it cold of easily of failed again.

If I remember correctly you never put in a new Torque converter, am I remembering correctly?

Not sure of anything that contributes to the temp sensor failing, will try and look into it some more for you when I have the time.