Heavy Clutch in Traffic
 

Hi All

I have a MY00 UK car. When I am stuck in vheavy traffic for a while (20 mins or so) I notice that the clutch becomes heavy and stiff. Once I clear the traffic and get some clear air flow it returns to normal.

Is this normal or a sign of impending clutch failure? By the way the clutch is standard as far as I know.

Cheers