We just purchased a new 2013. It still has less than 2000 miles on it. Every time I crank it up, about 6 seconds after it's put into drive, there is a popping noise that sounds like it's near passenger/front side. Sounds like I run over a rock or something small banging underneath. It happens almost every time (even when I'm not on rock). It also pops when I put it in reverse & turn hard right. Any ideas? (This is the wife, & I'd like to sound a little bit knowledgable when I call the dealership) This is our first new car ever, so these sounds have been very suprising... especially from a Suburu. Thanks in advance!