In this research, a moment propagated by a flywheel gyroscope is analysed as a control moment gyro (CMG) to prevent vehicle rollover. When the torque of the rotating flywheel is controlled, specific sinusoidal motion occurs. It is observed that the sinusoidal gimbal motion causes to be a smallish vibration amplitude in the upright position of the sprung mass. Therefore, CMG maintains the rollover stability of the sprung mass with a steady motion. Besides, there is a simulation model using a CAE software (RecurDyn), which is built to validate the equations of motion.