Hey tranny man, I don't have much experience with these tranny's but it looks like you are the expert! I have a 2003 gtp and just the other day while I was driving I slowed down to go over some train tracks and when I tried to speed up mycar wwouldn't shift out of first gear. The car starts up and runs fine, goes into reverse and has no problems in first gear, it just will not shift out of it. I got a friend to hook up his computer, but it didn't show a code, I'm not sire if his computer is set up to read tranny codes. I am just wondering from your experience if you know what the problem may be or if you could point me in the right direction. Thanks!!!
