M400 series products are developed to meet the requirements of universal usage applications from considerably rough clearance transmission gear boxes to latest compact car transmission gear boxes, and is designed to have a slightly higher cushioning property than M408. Multiple hydrocarbon type synthetic base stocks and multiple ester type synthetic base stocks are used for this product using new concept in tribology together with newly balanced function additives. This product is specifically for manual transmission gear box only. The 75W140 grade contains functional additives to have different configurations than other grades for use in LSD.