Hello I have the problem with my Audi 100 when I drive backwards and brake cracks something when I brake! but always only 1 time, I drive backwards right after braking is nothing! I brake carefully, so not to dom is nothing, I drive backwards, insert the first entrance and brake so is nothing! new are the crossbars, complete suspension legs, track rod heads, track and crash are set! it’s not really loud but I would be happier if it were gone! car is an Audi 100, c4, 2,6 thanks for helpful tips! greetings