Hi guys I recently repaired rear differential gears from professional body shop.
And it was okay for a while. But the noise started to come on the highway.
It only comes when I step off the gas pedal at high speed(65-80mph).
It isn't loud but definitely makes a little humming noise from the front or middle side of the car. And the noise is gone when brakes are applied. I am suspecting either improper rear differential repair or driveshaft problem. Any idea please?