Clutch Engage/Disengage problems

[Goro21]

I had my transmission completely rebuilt a few months ago as well as my clutch replaced (put a stock clutch back in) .. Everything works great except for when I rev high (6.5-7k) in first gear and then go to shift to second. When i push the clutch pedal in, it doesnt seem to disengage the clutch, as shifting out of first is not humanly possible. I can shift at 5-6k no problem, its only when your really getting on it that this happens. Oh, I have also replaced my Master and Slave clutch cylinders recently. . not really sure what would cause this to happen. Anyone have any ideas?

 

[Chewie031]

Out of all the item you mentioned that you replaced above. (obviously now ruled out)
someone can chime in here anytime but im thinking maybe clutch release bearing possibly sticking..( Thats just a guess)

 

[william cordero]

how much boost you running? stock clutches tend to slip if you drive them too hard. especially if you don't break them in.