Slipping the Clutch is a fast way to break it.
We have all heard the term slipping the clutch. Take slipping the clutch, the term for what you do when you slowly lift your foot off the pedal to engage the clutch, but you don’t fully engage it. What you do it you leave it hovering in a weird gray area. You might do this while easing your way into gear, you might do this while stopped on a hill so when you restart you don’t roll back, you even might do this inadvertently while shifting in higher gears. That said it is a terrible practice.
Whenever you do it, you will accelerate wear and tear of the clutch, even if some clutch-slipping (as minimal as you can stand it) is necessary, like when you’re starting in first gear from a stop. The reason? Clutch-slipping heats everything up, and all that heat on your clutch can fry it. Heat is the number one enemy of the transmission in my opinion. If you do it for too long, you’ll destroy your clutch in the space of a few hours. Doing this causes undo stress and heat on your transmission.
The longer you spend in that gray area, "the slip zone" the less life you’re going to get out of your clutch, that is pain and simple. You could get a couple of hundred thousand miles out of a clutch if you want to, or you could burn it out in an afternoon. It really depends on how you drive.
The best release of the clutch pedal when shifting is quick but not too quick. It is important to be fast. Since you also don’t want to just dump it into gear, both to keep the ride smooth and to protect the gears. Still, Wyatt said that if he had to choose between slipping and dumping, he’d go with dumping, since gears are pretty tough, and clutches less so.