Just acquired a 2006 XC70 that I am cleaning up for my wife's grandmother to drive. Running through some minor repairs on the vehicle, but have never dealt with "Axel Ping" before. I have found a few videos that sound similar, but figured it would share the clunk that I am experiencing. Sound only happens when shifting from either Park to Reverse, or Drive to Reverse. Clunk is very metallic, and has a literally "tinny" ping to it.
Additionally, I have a clunk from the steering while turning the wheel side to side while in park. Only happens when turning the wheel to the left.