@@maxfixit_DIY 现在无法确定到底是什么地方导致的这种振动,专门写了一个帖子问,有人也给了专业的回答,自己暂时无法这么专业去检查: 2012 RAM 1500,前传动轴(4X模式使用)换了新的,后传动轴也是U-JOINT损坏,换了两个新的U-JOINT, 换了所有的知道润滑油,后差速,变速箱,前差速,TRANSFER CASE...见过一个通过录制的噪音判断故障位置的,是日本一个团队的聪明的操作,知道每个部件,轮子,发动机,传动轴几个指标的转动速度(需要知道差速箱一个叫分动比?)然后就可以根据噪音频率判断这个振动频率是跟什么部件有关系,但是看起来北美的工程师没有用这个技术,我想把噪音发到网络,也把解决方案贴这里,兄弟有兴趣方便看看,没时间就别理会了: Ideas: - Start by eliminating tires/wheels as a vibration source, which is among the most common source. Most standard wheel balancers will gladly balance out bent wheels and out-of-round tires. The tech just puts on the weight the machine says. Sure, they might be 'balanced' but a warped or out-of-round tire will still be bent/warped causing a vibration down the road. Tires can have 'hard-spots" and broken cords which can't be seen. Get a good "Hunter Road Force" balance job to uncover tire/wheel flaws if any (Google it). Then stand there and watch the tire tech the WHOLE time, to make sure he's doing it 'right' and looking the tires/wheels over carefully. The machine applies in excess of 1200 lbs of 'road force' as the tire/wheel is spinning which attempts to simulate and uncover on-road flaws. Make sure that lower drum is engaged to the wheel (some lazy techs might skip that step). Then you can feel pretty certain you've eliminated tires & wheels as a vibration source. www.ramforum.com/threads/could-use-the-running-sound-to-identify-the-wearied-bearing.204227/#post-2846768