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What are the causes of transmission oil leakage?

2 Answers
MackenzieLee
07/28/25 5:24pm
The causes of transmission oil leakage are: 1. Oil seal aging and deformation, oil seal spring detachment or incorrect installation direction of the oil seal; 2. Shaft neck wear or depression, leading to poor sealing with the oil seal; 3. Damage to the sealing gasket; 4. Blockage of the transmission vent hole; 5. Loose transmission cover screws. Solutions for transmission oil leakage: 1. Replace the aged and deformed oil seal, paying attention to the installation direction of the oil seal; 2. Replace or repair the worn or depressed shaft neck; 3. Replace with the same sealing gasket; 4. Tighten the transmission cover screws in time; 5. Keep the transmission vent hole clear to reduce internal pressure and prevent oil leakage.
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DelAna
08/11/25 11:42pm
I know several causes of transmission oil leaks. Aging seals are a persistent issue - rubber components like oil seals and gaskets on transmissions can crack from thermal expansion/contraction over time, leading to leaks. The oil pan may also leak if dented or cracked. Loose bolts or connections allow oil to seep through gaps. Worn internal components like gears causing unstable oil pressure can similarly result in leaks. Improper oil changes during maintenance leaving contaminants or installation errors may corrode seals too. Untreated leaks that drain all oil can overheat and destroy the transmission, making repairs far costlier. I must remind everyone - if you notice oil stains in parking spots, don't delay. Get it checked at a professional shop immediately. Minor fixes may cost hundreds while major overhauls could run tens of thousands. Regular maintenance with oil changes is truly the best prevention.
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