it sounds like its coming from the driver side, its not the axel i just replaced them. The sound gets faster as you accelerate but then it will go away after awhile. Would that be a wheel bearing, thats the only thing i can think of or could it also be the timing belt?? Sometimes the noise will stay there for the whole time i am driving but it will also sometimes stop. And other times it isnt their right away but further down the road i will start to hear it. Its a small chirp like sound. The sound is only there when car is in motion.