Ans: A noisy differential can produce a range of sounds that may indicate problems. Common differential noise includes a whining or howling noise when accelerating or cruising at a constant speed, which often suggests worn gears. A clicking or clunking sound, particularly when turning corners or changing gears, might signal issues with the differential's bearings or limited-slip clutches. Additionally, a loud rumbling or grinding noise, especially during deceleration, could point to more severe damage within the differential. If you hear any of these noises, it's essential to have your vehicle inspected by a qualified mechanic to diagnose and address the problem promptly.