If the clutch pedal feels like there isn,t any slack right at the top as you just start to push it. This means either the little plastic pawl on the clutch ratchet is worn or the metal tab it sits against which is also the stop is worn. My one was worn and it caused the ratchet to keep adjusting the clutch cable up and when driving car hard the clutch started slipping. I changed pedal box and fitted new ratchet clutch feels much nicer.