the clutch/brake is attached to a drive belt pulley that goes slack as you depress the pedal..at the end of the pedal travel it engages the parking disc brake on the trans....does your pedal not return when you take your foot off?..also, if you have "shift on the go", that clutch pulley is connected to your speed lever and does the same thing as the clutch...tell me more details pls....right now all i can guess is your drive belt is slipping