Clutch Gets Really Stiff After 30 Minutes On Highway @ 75mph, Why?

[SplitGT]

when i am driving down the highway about 75-80mph after about 30 minutes, when exit off the clutch is pretty hard, and it grabs really close to the floor...

As soon as i press the clutch its very hard, and then as soon as i start to let up it grabs, while the pedal is pressed about 60% down still?? why?

If i pump the clutch pedal like 2 times, it loosens up...only happens when the car is driving with no shifts at high speeds...

thanks in advance

 

[stkjock]

stock clutch? mileage?

 

[ALLMOTOR05GT]

i have the same issue 05 gt stock clutch 67,000 miles

 

[SplitGT]

i think its the stock clutch 85k, i never dumped the clutch...i bought the car with 67k...

 

[stkjock]

take a look at the clutch fluid and see how it looks. maybe time for a change