Humming sound in Prado TX (2013 Model)

[Bakar222 Lurker Find all posts View Profile Close Bakar222]

Hello Guys,
I recently purchased a 2013 model Toyota Prado TX 2013 model (Petrol). There was a slight hummm kind of noice coming around the speed of 50-60kmh.
Now the noice has increased and when I drive the car around 40-80KMH at the RPM of 2500-3000, the noice comes constantly & it is making me worried. A friend of mine said it is related to Differential or 4X4?

[Staffo2009Prado Lurker Find all posts View Profile Close Staffo2009Prado]

Could be a wheel bearing? I've got a dodgy one that needs to be replaced at my next service. Makes a hum that increases as you increase the your speed.

[Bakar222 Lurker Find all posts View Profile Close Bakar222]

Hello, I dont this its coming from bearing. Do u think it has anything to do with Differential & 4x4 oil?