I just purchased a 2009 Equinox and I love it. I traded in 2 problomatic cars to get it however so every noise I hear I get paranoid. Just recently when I decelerate but don't come to a full stop and then accelerate again I hear a light whining coming from the rear. It only lasts for about a second and is pretty quiet. It has only happened 3 times. I was told that when you do that the rear wheels launch the vehicle and you might hear a slight noise from the rear differential engaging. I just wanna see if that noise is normal or if it is something I should get looked at. Thank you.