I hear clunking noises on the front passesger side when I drive over potholes, or when driving over humps when speed is above 40km/h. But no issues when driving on flat roads, except for a slight pull to the passenger side, which I was told was normal. 've taken my 2012 gs350 to three mechanica but they say it's fine. The clunking started after the frontshock absorbers were changed. Could someone please help me find out which part might need changing?