The basic principle of engaging a clutch is demonstrated in Figure 35-2. The flywheel and the pressure plate are the drive or driven members of the clutch. The driven member connected to the transmission input shaft is the clutch disc, also called the friction disc. As long as the clutch is disengaged (clutch pedal depressed), The drive members turn independently of the driven member, and the engine is disconnected from the transmission. However, when the clutch is engaged (clutch pedal released), The pressure plate moves toward the flywheel and the clutch disc is squeezed between the two revolving drive members and forced to turn at the same speed. However, when the clutch is engaged (clutch pedal released), The pressure plate moves toward the flywheel and the clutch disc is squeezed between the two revolving drive members and forced to turn at the same speed.