My 98 GTP with 330,000 miles finally lost the trans during our single digit temps. So its time to rebuild the trans. I plan on doing it myself, it would probably scare a lot of people but i feel confident about doing it. I've been doing a lot of research on the 4T65E-HD and it does not look to bad to do. With the trans having 300k on it i'm thinking i will have some hard parts that will need replaced. So ill be searching GPFN to see what more info to find and if anyone has any recommendations areas to upgrade or any helpful knowledge would be appreicated and thanks.