My GSX tranny shifts fine under normal driving conditions, but seems like it takes a vacation on the 1-2 shift under full throttle. Almost feels like it is kicked into neutral for about 1/2 second. I have never felt is slip once in gear, like they do when they are going out, just a hesitation. I dont know anything about what was done to it, I would guess it is a stock tranny as it shifts accordingly. The car is all stock with no visable mods. Open for any advice. Thanks Dennis