2012 128 with sport package and I love it except, It has Goodyear NCT5s which perform wonderfully. However thar are really really noisy at low speeds, below 15 mph. I get a loud whirling noise when pulling to a stop. I've eliminated brakes and trans as source of noise. Is this normal for goodyear eagles ? As I said tires perform great and run silently at speeds over 15. Any ideas ?