I don't know that there is a definitive answer for that as I think even the newer ones have had reports of problems. But, most people have no problems. You hear about the problems on places like this, but it's not like 10% fail. Even if you took a poll of people on this site, I bet you'd find a low percentage have problems.
Every car brand/model has issues... This transmission has, so far, been much better than my Cadillac's was!
Every car brand/model has issues... This transmission has, so far, been much better than my Cadillac's was!