I have a 93 porsche 968 , just recently I have a problem when I release the clutch pedal slowly , i hear a grinding sound. But once its engaged and going there is no problem at all. If I downshift and release the pedal it does the same thing. This is through every gear. I took it to the place that installed my clutch a year ago and they adjusted my pedal but never checked my clutch. which upset me since I have a 3 year unlimited milage warrenty. They said I never told them bout the grinding sound, I only mentioned it, was somewhat difficult to get the clutch to catch and I had a bad clutch smell coming in the cabin. . I immidiatly took it to porsche of colorado springs and the, service manager took itout as a favor for me and without putting it up in the air ,he gave me his opinion after driving it. He said that it could be something simple. But the thing that threw him off was it vibrated towards the rear but he wasnt sure if it was actually from the gear box (i think thats what's back there ) or just vibratng from the front traveling back. I have an appt with them monday for a better look. I just need help if anyone else experienced this.