V70 D5 Delay Automatic transmission…

Hello to each other, probably one or the other will hit the hands over the head, but I have not found a suitable answer to my question and therefore open the new thread. I drive a Volvo V70 D5 after countless 900 models now. Since some KM I worry about the automatic transmission. I try to describe it in the best possible way. When changing gears (e.g. P to D or the other side) the transmission switches very late. It takes between one and two seconds until the But if I have the foot only minimally on the accelerator pedal, the aisle slips in with a proper bang and the vehicle moves. After that he drives quite unobtrusively. A reading of the error code at the contract workshop revealed nothing. Do I have to worry seriously, I am not used to such a delayed switching from the old 965er (as I miss it)? Besides, there is another problem. m: When unlocking the ZV, a loud screaming sound above the rear right wheel box can be heard. What could it be? Actuator? I am grateful for every attempt at a fault diagnosis and tips for further handling. Here is the technical data: V70 D5 Built 2002 2.4 l 183.000km 163 HP/ 120kw Thanks