I had a friend with the same noise his rear rotors were glazed over he got them cut and it went away. Don't know about the differential but the calipers may also be dragging witch is causing it to work harder
It may be low of lube or a bearing may be defective. Have it inspected by a professional.
Fuel pump whining comming from a03 gmc sierra
Previas have a history of a whining noise coming from the catalytic converter. There is a bracket inside the converter that when loose or has came apart creates the whining noise during acceleration. It especially is very pronouced during high speeds in the freeway. You might be in for an expensive cat converter replacement.
A whining sound coming from the front of the engine would make me think one of the bearings is wearing out in the belt assembly. This is something you should fix promptly.
wheel bearing, gearbox or wind noise Supercharger?
On a 2004 Ford Expedition , 4x4 : The front differential has a tube ( hose ) coming off the top of the differential ( the biggest part of the case where the gears are )
A whining noise in the drivetrain of your Ford Aspire could be due to several reasons, including worn or damaged bearings in the transmission or differential, low transmission fluid levels, or a failing water pump. It's also possible that the noise is coming from the power steering pump or alternator. To diagnose the issue accurately, it's best to have a qualified mechanic inspect the vehicle, as ignoring the sound could lead to more significant problems.
Gas Lid not tight is the reason my eng. Light keeps coming on
Negative
I have an after market fuel pump on my van the you can hear from inside and outside.
Could be a right rear axle bearing going bad.
It may be your differential or your whole rear end or it could just be a worn out gasket.