看了这个，我严重觉得是后刹车鼓的问题

https://ebcbrakes.com/articles/brake-vibration-common-questions-answered/

How to rectify the problem

The first thing to do is to determine whether it is the front or rear rotors that are causing the brake vibration. If the steering wheel itself is shaking, it is more likely to be the front, whereas if the whole car and bodywork shakes, it will probably be the rear. Additionally, it is not necessarily the pair of rotors that are the problem; it may only be one of them. Finding the location of the shaking is the first step to solving the problem, however.

因为我的抖动主要表现在车座位的前后移动。后刹鼓不平或磨损厉害会导致这样抖动么？