My truck is now producing an intermittent tick. It's only noticable when at idle though the clutch pedal. No audible sound is present. The wife has noticed it over the last two weeks. I finally felt it today. The tick feels very rythmic. Truck has 166,000 miles. I'm sure it's the stock clutch. Engagement of 2nd to 3rd has never been as smooth as I'd like if that makes a difference. Any opinions? Is this another of DC's little quirks?