i have an 02 gt and had the trans tsb done after fighting with a bunch of dealerships and ford.mine also kicks out of 2nd and 3rd like yours but only under heavy acceleration.it doesn't do it under normal driving conditions.it still did it even after the tsb.my warranty is up and my car has only 15,000 miles on it and i've never had it at the track or street racing.i'm holding up on doing major mods because of the trans .a new tarns would be nice but probably a couple grand or more.i guess i'll have to live with it for now!