Film like 75W140 with light drag and friction of 75W80
Red Line’s lightWeight Shockproof gear oil is designed to lubricate racing transmissions and transaxles that see serious loads (not recommended for most syncro-type transmissions). It has excellent low-temperature flow, which allows easier shifting when cold. It can be used to obtain maximum power transfer in racing differentials that do not see high temperatures. Similar to a 75W140 gear oil, but with the lower internal friction of an SAE 30 motor oil, it’s used in 2-stroke and 4-stroke motocross transmissions (often mixed in equal parts with SuperLight ShockProof gear oil). It’s also used in most road-racing differentials with moderate power and dogring racing transaxles.