The Volvo forum is
here
I used to have a V70.
A really good car until the auto box failed.
The problem was Volvo decided that the box was sealed for life.
I had the fluid changed shortly after getting the car, but the damage had already been done.
The specialist that I went to had a yard full with auto box failures.
There is a thread here from a XC70 owner, with similar problems
https://www.volvoforums.org.uk/showthread.php?t=247772
Might not be a problem with the one that you are looking at, but worth checking out.