Lincoln Aviator rear differential making loud noise at higher speeds on Lincoln Aviator

Some Lincoln Aviator owners report experiencing loud noises from the rear differential at higher speeds, which may indicate several underlying issues. These noises could stem from a faulty wheel bearing, particularly if they are more pronounced on one side. Common sounds associated with rear differentials include whirring, clunking, or banging during acceleration. Additionally, worn or improperly lubricated components, such as the pinion gear or ring gear, can create howling noises when accelerating. Other potential causes for humming noises may include uneven tire wear, damaged wheel bearings, faulty differentials, or even A/C failure. To accurately diagnose the issue, owners are advised to consider the specific symptoms, such as a constant roaring sound beginning at around 35 mph without drivability problems. A technique to identify the problematic wheel bearing involves swerving from side to side at the noise's audible speed, allowing the noise to indicate which side is affected.