My TTA lately has been holding gears, as in not downshifting, and upshifting very pickey. The tranny was rebuilt a few years back by Mike Kurtz shop and its doesnt have a gross amount of horsepower. I also noticed when I'm holding 40-60mph it feels like the torque converter is locking and unlocking as if it can't decide what to do, and if I lay into it a bit instead of downshifting, it starts acting as a standard tranny does when you floor it in to low of a gear.