Most stock auto trammies these days are not designed to accept any mods. Also, the manual mode - believe it or not - was never engineered to be a fun mode like a true clutch tranny. It was only really meant for situations where one would prefer to leave it in a certain gear while maybe towing or very hilly terrain. The marketed use of having "fun" with the auto stick is a blatant lie on any of the current automatics that are not proven high tech units like a Porsche dual clutch that actually works. There aren't many. I wouldn't be surprised if even they don't handle the kind of "fun" that's implicated in advertising.One of my Facebook friends with a 14, has been through two trannys so far. I've heard of others with the same. The T62 is a crappie trans with almost zero headroom for performance improvement just like the Hyundai Trans in our Dart.
I wonder if @cereal killer could weigh in on this?