On occasion when taking off from a stop in 1st gear I sometimes feel a slight vibration/pulsing feeling in the clutch pedal when disengaging it. It kind of feels similar to the feeling a brake pedal makes when the abs activates on a hard stop. I'd say it might do this 1 or 2 times out of every 30 or so times I start moving. Anybody else notice this? My car has 21,000 miles and I'm using the stock clutch. I do open it up from time to time and I do have to deal with a lot of stop and go traffic on the three days I go in to Dallas.