Anyone have some knowledge behind these clutches? Bought the car with around 1.5k on the build which means its got roughly 2.5-3k on it with my added miles and a little over 33k on the body. Recently the clutch started slipping in 4th and 5th at high rpm around 7-9k but would grab fine in any other situation and only on E85 as the car makes 647/495 on Boostin's mustang dyno and 93 is around 440. Was recently driving the car and was coming up to a light when i pushed in the clutch pedal it went half way down then popped and it went to the floor. pedal was squishy when i tried to push it in again ( already had it in gear so i was coming up to a stop light this time) i thought it went completely out when i went and pushed it again it felt almost normal.. it had a little bit of squishiness at the top but then the normal feeling the rest of the way (no its not play i know how the clutch felt previous to this lol) car goes into every gear perfectly fine from a stop and every rpm range with the exception of when i let out the pedal i can feel a grindy/poppy feeling in the pedal. But now as soon as i hit around 10/15lbs it slips completely. Put it back on pump and did about 3 little pulls and it felt fine might have slipped for a split second but im pretty sure (86.2%) i just broke traction. Any idea whats going on here..

and before the bash..
i had to drain the rest of the E and get some 93 running through it as i left for florida for a month and didnt want the E just sitting in it or i wouldnt have drove it like that.

 

You might want to check your hydraulic throw bearing.

 

i plan on taking it apart when i get home, i haven't heard of them failing though but thank you