Is this normal for an AF Nikkor 70-300mm lens?

Last week I bought a used AF Nikkor 70-300mm 1:4-5.6G lens from Adorama. It arrived today, and while it seems to be in great condition with only a few cosmetic blemishes I've noticed that when adjusting the focus manually it makes a sort of whirring/grinding noise. I'm not talking about the noise the autofocus motor makes; I was expecting that to be louder than my AF-S kit lens. Is this typical operation for this lens, or should I send it back for a replacement?

Added (1). Going to a camera store really isn't an option. The nearest one is more than a two hour drive.

Added (2). But I'm NOT talking about the noise the autofocus motor makes… Like I said, I know the AF lenses are louder than AF-S lenses are. The noise happens when I'm adjusting the focus after zooming in on a subject.

The old AF lenses were noisier than the new AF-S lenses.

Visit a camera store and have them listen. Or better a repair shop. See what they think.

Do you have any other lenses that use the camera body's autofocus motor for comparison? If not, then perhaps you could find someone who does, or look up youtube videos that include the normal noise of that autofocus motor.

Edit:
How do you know? "Whirring" is how i would describe the normal autofocus noise. "Grinding" sounds odd, but without a sample it's impossible to tell. Do the lenses focus properly? Is there a noise or a roughness when you focus manually?