I recently had the half axle replaced, and afterwards the car hesitated while accellerating (between 30-50mph). When I took it in again, they said it was the alignment. The very next day, we heard a loud, metallic popping noise, and basically couldn't drive further. The next mechanic said that the hub assembly caused that last break down. Could the need to replace the hub assembly be due to something going wrong when the axle was replaced?