I have 2003 ZTS that has abnormally heavy/stiff clutch pedal that occurs in temperatures above 70. The hotter
it is outside the worse it gets. The srange thing is that if you push it in and out a few times it nearly
goes back to normal then you drive it some more and bam the clutch get stiff again.

With temeratures under 60, it never exhibts this weird behavior. Hoping someone out here may have run into
this and figured out the cause.

The car only has 50,000 miles on it and this started happening last summer at 28000 miles and at the time
only in 90 + degrees. 95% of the miles are highway miles. All winter and up until it reached 70 this spring
it was normal.

thanks for any help,

b