I have a 2003 Ford Explorer with about 65k miles that has been making noise and I am looking for an opinion as to what it might be. The sound is low and dull and only happens when the car is moving. its a repeating sound which seems to be connected to how fast the car is moving and not how fast the engine is running – at low speeds it is almost like a really low dull knocking sound while at highway speed its basically constant.
The sound is not very loud or really that noticeable – if you aren’t familiar with the car, it might take a little while to even realize the car is making noise.
The mechanic at my last inspection didn’t have any thoughts, but I also don’t think he really tried to figure it out.
before I take it back in I am just looking for thoughts on what it might be – maybe a wheel alignment issue (though I haven’t noticed any steering issues)?