I have a 97Gt that from what I gathered of owning it for 3 years has a shift kit of some sort installed. I believe I have a shift kit because on the 1-2 and 2-3 shift I chirp the tires and get a little loose sometimes. I Basically want to fine tune the shift points and make the O/D not turn off at X Speed. (around 75mph) I feel that I'm not getting the most out of my setup. I really don't want to get a torque converter for the car. So I guess a chip of some sorts or a dialablo scan tool or what ever? Something that I could change the shift points and make the O/D stay on. Thanks for any help.