When I removed all four wheels to paint the calipers & hubs, I noticed that none of the lug nuts were very tight. I also saw uneven wear on the back side of the wheel where the nuts should have been holding the wheels tight to the hubs.
The owners manual (on page 5-125) indicates that the Wheel Nut Torque should be "100 lb ft".
I know that mine were no where near "100 lb ft"
They are now.