Bearing Noise - Isuzu 76mm

Differential side bearing noise can easily be confused with wheel bearing noise. Since side bearings are preloaded, the noise should not diminish much when the differential (transaxle) is run with the wheels off the ground. Wheel bearings produce a rough growl or grating sound. This sound will continue when the vehicle is coasting and the transaxle is in "Neutral." Since these bearings are not preloaded, the noise should diminish considerably when the wheels are off the ground.