Nissan Xterra bad differential causing loud hum at 60 mph that resolves when releasing gas pedal on Nissan Xterra

Some Nissan Xterra owners report experiencing a loud hum from the rear of the vehicle at around 60 mph that disappears when they release the gas pedal. This noise may indicate potential issues with the rear differential, such as worn bearings, insufficient oil, or clearance problems. Additionally, some owners find that old or low rear differential fluid can contribute to the noise, which may be resolved by changing the fluid. Furthermore, a poorly aligned rear end could also lead to a high-pitched whine during driving. It is recommended that owners have a mechanic inspect the differential to accurately diagnose and address the source of the noise.