When shifting, most notably from 1st to 2nd, my car clunks into gear. It's difficult to explain but it's like the clutch doesn't totally disengage. It is the worst in the 1st to 2nd shift, noticeable in the 2nd to 3rd shift, and barely present in the other two shifts. Every once and a while when the car is cold, (just started), I'll go to put it in 1st and with the clutch totally depressed I can feel and hear a thud. It makes for fairly difficult shifts. When shifting as fast as possible, (ie. when racing), it isn't noticable...probably cause of slamming it into gear. Also, every once and a while it will shift very smoothly between 1 and 2. This happens maybe every 10 shifts from 1st to 2nd. Have any ideas??