soxfan69

I drive in manual mode 99% of the time,but lately when it gets warmed up, the shift acts like it a slipping when goin from third to fourth gear. Here's some more info. I live in Fl and right now it's 97* with 97% humidity. It's hot damnit! Has anyone else had this problem. Would a tranny flush and swap with a quality fluid help? And what about a trans cooler? I don't track the car and don't plan to. I have 24k miles on it with an FI exhaust and post maf tubes as far as mods go. Thanks for any input