When I start my car, the first time I accelerate past about 20mph the car makes a swoosh or very milk clunk noise (it's hard to put into words). It's a 2016 cruze LT I just bought used with 24k miles on it. If I come to a stop and accelerate through 20 mph again and again during my trip, it doesn't make this noise again. Only when I first start my car and just get moving. What could this be?