Dual-Mass Flywheel A few cars and light trucks use a dual-mass flywheel. These flywheels are used to reduce vibrations transmitted through the transmission, provide for smoother shifting, and reduce gear noise. Dual-mass flywheels can reduce the oscillations of the crankshaft before they move through the transmission (Figure 35-3). The flywheel consists of two rotating plates connected by a spring and damper system. The forwardmost portion of the flywheel is bolted to the end of the crankshaft and smoothes out the crankshaft’s oscillations. The pressure plate of the clutch is bolted to the rearward portion of the flywheel. Engine torque moves from the front plate through the damper and spring assembly to the rear plate before it enters the transmission.