故障现象 一辆皇冠3.0轿车速度达到120km/h时,车身及仪表台抖动厉害,车厢听到“隆隆”共鸣声。 故障检查与排除 1.举升故障车,着车、挂D挡加速至120km/h,这时会发现2个后轮上下猛烈跳动; 2.拆下4个轮胎进行轮胎动平衡测试,未发现动平衡有任何异常; Fault phenomenon A crown 3.0 car speed reached 120km / h, the body and dashboard powerful shaking, the car heard “rumble” resonance sound. Troubleshooting 1. Lift the car, car, hanging D block acceleration to 120km / h, then you will find two rear wheels up and down violently beating; 2. Remove the four tires for tire dynamic balance test, did not find Dynamic balance any abnormalities;