What Causes Oil Leakage at the Top of the Transmission?

1 Answers
AxelDella
07/30/25 12:57am
Oil leakage at the top of the transmission can be caused by the following reasons: Aging of Seals: More than 90% of cases are caused by the aging of seals (oil seals). Over time, seals (oil seals) harden, meaning they lose plasticizers with prolonged use. The result of this deterioration process is that the seals first begin to shrink, then harden, and eventually even crack, leading to inevitable oil leakage. Improper Use of Lubricating Oil: Automobile transmissions require lubricating oil, but improper use of lubricating oil can also cause oil leakage at the top of the transmission. It is important to repair the leakage promptly.
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