I have 2006 infiniti g35 coupe sports package, I recently bought the car and all of a sudden the clutch starts reving very high. I'm talking in the morning it was fine but in the afternoon of the same day she started to rev high. But once I rev her up to 5-6000 RPM she catches fine and takes off any ideas if this is the clutch? itself or something like the master cylinder or slave cylinder?
From my experience with manual transmissions, the symptom you describe points to a worn out clutch. Only one time did I find that the slave cylinder would not retract all the way causing the clutch to slip. Though driving that way, even a short while, significantly shortened the clutches lifespan.