Hey everyone, I'm new to this forum. I have a 2006 ESV, completely stock. However, I was wondering if any of you have noticed this and if this is "normal". When acceleration at around >3K RPMS, the engine makes this high pitched whining noise. Almost sounds like a really tiny motor. I have taken my car into the dealership a couple times. They changed the alternator already. But the noise has not subsided. Can anyone tell me anything about this? thanks.