On my 2011 XC70 T6 AWD with 185k km, I've had a noise develop that wasn't there before. Not very loud, but noticeable when decelerating at higher speeds (>70km/h). I also noticed while doing an oil change that there is a grey oil/grease deposit on the heat shield all around the front CV joint of the prop shaft. My conclusion is that the CV joint is likely going bad, and has lost its grease / oil fill? There is no other obvious oil leak in the area, and the grey greasy deposit on the heat shield did not have a distinct smell (such as gear oil). Do you folks agree with the diagnosis that the CV joint is likely failing? Any experience with a repair like this? Space seems tight, and the exhaust runs underneath the prop shaft, so I'm not sure if the exhaust needs to be removed for this repair?