Is this a rear gear whine?
 

Hey guys, I'm trying to figure out if this is a gear whine sound. Watch this video I made and let me know what you think.

YouTube video

I think I heard it, hard to say, could be
from what I have read about it, whine is not as common in the 3.55 ration gears as the 3.73's and up; but could still happen
you could go back to the installer and ask them about it; ask them if they can check the gear set-up