I have a 2001 chevy cavalier, it's turns on fine and strong still..I put it in 1st gear and release the clutch and it won't catch when I rev..at all. The car stays running with the clutch out..in any gear.. The pressure in the actual foot petal still has the same amount of pressure it did before it stop catching..Could it be the clutch? Or the transmission? Please help me out with some advice .. Thanks