If your car has a turbo charger it is probably the turbo charger.
A whistling noise indicates a vacuum leak.
Brake booster problem?
A chirping whistling noise!
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
whistling noise from engine will be caused by a leaky gasket,sucking air. this is usually the intake manifold gasket
Vuvuzela and police whistling noise of loudspeakers and people
dog whistling
The most common cause of the whistling in a 2003 Impala is a vacuum leak. Any of the lines under the hood could be causing the noise.
Perhaps a vacuum leak?
whistling loud noise
Cracked Fly Wheel
The whistling noise could be a belt but I don't know about the gear jumping. Something wrong with the transmission most likely. Teeth missing.