Roaring noise from rear end/check engine light
I have a 2012 dodge journey awd. In the last two months, there has been a roaring noise coming from the rear end. The faster your speed, the louder the roar. Also, for several months, the check engine light comes on with every other fill up. It stays on a couple of days and goes off. I take the vehicle in for regular, on time oil changes and checks. They found a leak on the differential and the dealership repaired (2 years ago). What do i need to be looking for?