Is it rpm or speed dependent? Try to drive the car for a while and find a quiet place to drive around in and listen for the noise. I was shocked at how loud these differentials can be with stock fluid that had been in the diff for 12,000 miles.
Are there any drivability issues? Can you hear it when parked either idling or revving?
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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
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