Okay I will let him know when he gets home. He has worked on older trucks and cars not much with AWD vehicles. Its hard to tell which side its coming from. There is some vibration when I first start driving but after I hit about 45 its just noise. I was worried in might be something with the rear end or something. We bought this used and it has 112,000 on it right now so we have only had it a few months.