Is my diff bad?

[CrewChief]

Im very limited to my knowledge about cars since i just only recently got an interest in them when i bought my hachi. My car makes this loud high pitched whining noise in the rear when i get it up to about 30 mph, it gets a little quieter when i get it up to about 65 mph but its still there. i was just wondering if this could be my LSD getting worn out or if its a wheel bearing going bad. Any thoughts or opinions are greatly appreciated.

[LittleRedSpirit]

Its probably worn gears and bearings. More likely in the centre. You need the attention of a good diff shop.

[CrewChief]

Alright thanks, the guy i bought it from was convinced it was a wheel bearing for some reason.

[drift kid]

Wheel bearing will br more of an on/off slight grinding noise that will get faster as you accelerate

[Matt]

And if you corner it will load up the bearing too and should be louder depending on which way you turn.