Knock back right

Hello people
It's probably been asked about a dozen times,
But I'm not much of a part of it.
Therefore the question(s):
In the case of uneven stairway, it is animally lurking back right.
(sounds like the exhaust under the
Ground beats. But it's not him.)
The sound only occurs when the road
==References== In the case of the same type of work, the
the driver's side doesn't matter.
I'm guessing a rubber bearing from the triangular thing.
( am I not in the name? Damn)
Well, you know what I mean?
How many people are sitting there and can you
somehow test which it is ? If there is a
One.
Does anyone have any experience with it?
I'm grateful for every hint, because it's annoying
but quite nice, and of the consequential damage times
Not to mention.
Greetings, and thank you in advance.
Carsten