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Red Line 80W140 GL-5 gear oil is a high-viscosity lubricant containing additional friction modifiers for suitability with clutch-type limited-slip differentials. Not recommended for synchronizer-equipped manual transmissions due to slipperiness, it is popular in stock car racing differentials and transmissions and meets API GL-5 and related specifications for heavy-duty differential protection under extreme loads.
Red Line 80W140 GL-5 Gear Oil - Quart
