I have tried many things try to fix my clutch problem and im starting to think the shop that installed it messed or install something wrong. I have replace both the master/slave cylinders bleed the thing to death with motive bleeder and by hand, replaced tranny fluid, and adjusted the pedal and the shifter guides with no results. Only thing i might have left to try is remove the clutch "orifice" i read about on the G site. My clutch sticks at high rpms and when i try to throw in the next gear it locks me out.

Also, i leave the car in neutral and rev it high and the clutch pedal goes down by itself wtf!?!? Any help please?

 

Lets help all at once guys... One at a time please

 

Okay. Try to go to another mechanic and tell him what is going on in there. Maybe it's the flywheel. Since when you drive your Z ?

 

never heard of this issue before so bump for you.

clutch pedal engages when revving in neutral .______.

 

Bleed the clutch fully if it still does it then one of the cylinders is probably bad (master/slave ect). Slave seems to be a common issue.

<edit> nevermind looks like you already did all that. Not sure man...

 

I did a Google search of: clutch pedal drops at high rpms

One of the more interesting hits was this:

http://mustangsdaily.com/blog/2010/0...11-mustang-gt/

The important part:

"The clutch pedal Stayout is a condition where at high engine RPM, centrifugal forces on the clutch system can reduce the force with which the clutch diaphragm fingers push against the release bearing. This can result in the clutch pedal staying on the floor until engine RPM decreases and the diaphragm return forces increases. Ford’s recommended service procedure is to replace the brake pedal and bracket assembly. "

The explanation makes sense, but I don't see how replacing the pedal and bracket assembly will fix the problem.

I guess the diaphragm spring in recent clutch designs is dished in toward the flywheel in the released position. Centrifugal forces at high rpms force the inner part of the spring fingers outward, and that makes them move away from the release bearing, causing the pedal to drop.

It's been a while since I messed with a clutch, but I recall the fingers on the diaphragm spring were angled away from the flywheel at the center where they touched the release bearing. That arrangement increased the clamping force at high rpms and the pedal got a little harder to push down, too. Of course that was long before anyone ever thought of that *&$^&#*^% stupid concentric slave cylinder arrangement which probably saves the automakers about four ounces and thirty seven cents per vehicle.