Hi guys, I've searched for a few days on this, but have found nothing really relating to the VF, some threads similar to older models of Commodores though. I know trying to solve such issues with an internet search is almost impossible, and in the VF workshop manual (which I have gone through) they even state "Driveline noises may confuse even the best technician", but I want to try and narrow it down a bit so that I can avoid being ripped off when I take it to someone. I'll try to explain as best I can. The noise/sound usually only occurs once I've driven the car for at least 10 minutes, so once everything is up to operating temperature. Sometimes it takes 10 minutes to surface, other times around 20 to 30 minutes. Could be dependent on the air temperature at the time, who knows. Once it does start though, it's there until I park the car. So from a stationary position, during say the first 5 seconds once initial load is applied, I'm getting 5 small knocks (sometimes more, sometimes less) in a row in quick succession from the rear of the car, and then it stops. It does not matter if I am driving straight, turning left or right. Once past that initial 5 seconds or so it goes away no matter what speed I am doing, until I pull up to a stop again, then I hear it again once initial load is applied to get going again. I don't think it's suspension nor exhaust related, otherwise I'd hear it constantly I guess. I'm going to try and jack the car up on the weekend to try and have a look, but if anyone has experienced something similar, I'd love to hear your thoughts, or any suggestions would be appreciated. Also if anyone can suggest someone in Sydney I can take it to? I can take it to my local mechanic, or should I go to a drivetrain specialist? I am hesitant to take it to Holden. It's a 2015 Series 1 SSV manual by the way with 69 000km's.