@rjcapy, the problem with your Corvette is not that the transmissions are bad. This is a labor issue in which the cooler should have been checked at the start. And if the cooler was clogged you have to assume that was due to debris and gunk from high mileage and/or lack of fluid changes.
There’s a poster on this board who says the Ford 4R70W is the worst transmission ever. Transman disagrees with that assessment as do I.
Somewhere there’s someone cursing Toyota over their shoddy transmissions…
Somewhere there’s…