80W140 GL-5 Gear Oil - quart, fully-synthetic, for differ=tials and racing trans, ester-based for stable viscosity, reduced wear, contains =ough friction modifier for most limited slip differ=tials80W140 GL-5 Gear Oil - quart, fully-synthetic, for differ=tials and racing trans, ester-based for stable viscosity, reduced wear, contains =ough friction modifier for most limited slip differ=tials