Rear Differential Gear Whine at 60-70 mph

[AHESQ]

Does anyone have this read diff. gear whine at 60-70 mph?

Started out small when the car was brand new and it's slightly louder now with 650 miles on it.

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[MidwayJ]

My S550 developed that at about 55k miles. It was noticeable at above 40 mph or so. It turned out there were metal shavings in the diff fluid and new gears were needed. Fortunately it was covered by the powertrain warranty.

You shouldn't be having an issue like that with a new car. I would check your differential fluid level.

 

[Alan Applegate]

Auto or manual?

 

[AHESQ]

Manual

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