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How many liters of gear oil should be added to the manual transmission of the Volkswagen New Jetta?

1 Answers

Rocha

07/30/25 8:41am

Volkswagen New Jetta manual transmission requires approximately three liters of gear oil. Introduction to automotive gear oil: It is a high-viscosity lubricating oil specifically designed to protect power transmission components, typically accompanied by a strong sulfur odor. Vehicle gear oil is classified based on performance and viscosity. Currently, the American Petroleum Institute (API) performance classification and U.S. military gear oil specifications are widely adopted worldwide. Most manual transmission lubricants and differentials use quasi-hypoid gear oils. These contain extreme pressure (EP) additives and anti-wear additives to handle the action of hypoid bevel gears. Working conditions of gear oil: During operation, gear oil experiences continuous changes in gear contact surfaces, with temperatures rising moderately, typically ranging from 10-80°C. Additionally, gear oil is subjected to extremely high pressure. During gear transmission, the unit pressure at the meshing part of the teeth can reach (196-245)×10 kPa, while hypoid gears can withstand unit pressures of (294-392)×10 kPa. Moreover, gear oil operates under conditions of significant speed variations and frequent rotations, making it prone to being squeezed out from the gaps between teeth, resulting in semi-fluid friction.

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