ive got a 200 tdi disco i had a new clutch put in cos the arm had failed it had a hole were the piston pushes the rod to the arm. so i got new parts everything new but when i got it back from the garage the clutch was all or nothing as if the clutch pushed yer foot off the pedal.the bearring made a hell off a noise when your foot was not on the pedal. the clutch has been like that for 3000 miles or so . and now its gone again the arm has failed again why? can anyone help? im trying to get the garege to do it