Driveline Harmonics Trainer by Megatech is designed to demonstrate driveline harmonics. The trainer incorporates the driveshaft, Input and Output Yokes, U-Joint, tooth sprocket wheels and a constant RPM electric motor to demonstrate driveshaft angle and velocity. The trainer can be used at various operating angles to demonstrate the causes of vibration when the output driveshaft rotates at variable speeds depending on the angle between the input and output yokes.