I've had a ZO6 clutch for about 10K miles now. (85K car). Lately, when I do a relatively high speed run, about 110-130mph, I'll get a dead pedal like when you go to the strip. This will happen with smooth shifts the whole time. NO power shifting, no launches. Just 120 in 4th gear. What's goin on?? Keep in mind, I'm in PHX, and the temps are 100+ regularly. Is the clutch just hot, fluid getting hot...any answers??