Steering saws back and forth on curves
As I take a gradual increase radius curve such as freeway cloverleafs, I feel some sawing back and forth of the steering wheel. I have 15:1 ratio steering. The tires and wheels have been changed (to 225/60/15), a front wheel alignment has been done and still I have this condition. The car feels solid, true and tight otherwise as I drive. Any thoughts on what could cause this or past experiences?