Noise from rear end at hwy speeds. on 1998 Dodge Ram 1500

I had a differential service done. Replaced front and rear brakes. Still the noise is there. Brake serviceman said I would have to take to a transmission place to find noise and repair. It is something in drivetrain.

Asked by for the 1998 Dodge Ram 1500
1 answer
The front pinion bearing in the differental is very small and very common for failure. Fix it ASAP!