Flow-Rider
Burner
You need a good scanner to check for problems, but anything is possible with a secondhand car though.The speed sensor comment got me thinking. It was so amazingly badly out of alignment that it scalloped the front tyres inside a hundred kms - it was toeing out so much it almost was tracking well… Seller had new control arms fitted, but didn’t do an alignment…
But I’m thinking it might have been enough for the transmission computer to have eventually picked up on some speed data discrepancies and killed the converter lockup. It’s an optimistic idea, but I’m going with it for now!