Thank you!!! and a few more questions

Hello together,
As slowly as I get my V8 in the grip, of course thanks to your help!
but I still have to ask:
1. Is the ot-giver always the same, or can you do something when he spins every now and then?
2. I drove backwards out of the shade today and (unfortunately!!) put on the back shortly, after that came the rear left wheel a grinding while driving. had no more pleasure tonight, but does anyone ever have any idea what that could be? the noise gets weaker when braking, but as soon as I release the pedal, it is back!!!
3. In my case, all gear positions(1,2,N,P,etc) are equally lit in the armature board. Is this the emergency program? he drives like ne 1, forward and backward!!!
What can I do?

Thank you

Leif