I recently was hearing noises form the back of my car that sounded like a helicopter chasing me. the noise would increase when I was going about 30-40 MPH but after 45 I would hear anything. Anyways, I got it fixed, i got a part from the junkyard for about $400 and the total was $600 with parts & labor..... just wondering has anyone else had this problem?

 

it was my differential ot my differentor......sorry guys