I have an 09 V6 4wheel drive and when first starting out form a total stop I hear a "moan" or "groan" coming from the rear of the vehicle. It only lasts about 2 seconds and then goes away. It sounds similar to the noise you get from a limited slip differential when turning a sharp corner. I've experienced that on an F150 and a tube of differential additive corrected it. I hate to put something like that in this vehicle since it is only 6 months old.

If I'm rolling along slowly and turn a sharp curve at like an intersection I do not hear it. Only when starting out from a dead stop does this noise appear. Also it does it when starting straight forward or when turning.

I briefly spoke to the service manager at the dealership where I bought it and he said the all wheel drive vehicles do this sometimes and there is no fix. He wants me to bring it to the dealership sometime and let him listen to it but I have been too busy to be tied up with them right now. If he tells me there is nothing he can do I will be very upset with this vehicle because it is very annoying and I'm hearing it every time I start out. The vehicle has 16,000 miles on the clock and it did not do this when I first purchased it.

Any ideas anyone??? Is this normal for all wheel drive??