Originally Posted by uberwasser

Not sure if it would hurt anything. But motorcycle gear oil is formulated not just to lubricate gears but also to play nicely with wet clutches. So it's probably, in my laymen understanding, similar in formulation to limited slip oil that is designed to work with the clutches in an LSD diff. You wouldn't use an LSD gear oil in your regular diff so I'd imagine you'd not want to use this motorcycle oil either.