Clutch only wears when pressure is applied to the disc while the disc is rotating at a different RPM than the flywheel. If you tap the gas to raise the engines RPM prior to downshifting you can almost match the RPM of the engine to the disc when you let the clutch back out there will be no slippage. Now if your a rookie and just jamb it in a lower gear and let the clutch out without raising the engine RPM (which i serioulsy doubt anyone on this site is too stupid to do) then you have wear.
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