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1, there are two cases of axle oil leakage: (1) gearbox oil leakage, and the surface of the oil leakage looks shiny. This kind of oil leakage is very troublesome to disassemble the gearbox and replace the half shaft. (2) After high-temperature and high-speed operation, the black lubricating oil in the ball cage is thrown out, and the half shaft oil seal needs to be replaced. Judging from your description and what 4S said, it should be the second case. 2, clean the throttle,