Hello:  I have a 2012 Honda Odyssey Van - Automatic transmission - 6 cylinder engine.  When we start the car and begin to back out with slight turn of the wheel we hear this deep sound that's like a bass string being plucked. We also hear when driving and using the steering wheel a kind of popping or clunking sound when turning .  Its not all the time during a given drive but definitely when the car is cold and then started , when you turn you hear that thrummmmmm sound like a bass string being plucked. So there are three different types of sound. The thrumming sound vibrates through the car.  Sorry , but its hard to perfectly describe this. Can you help?