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What are the causes of transmission oil leakage?

3 Answers

MackenzieLee

07/28/25 9:24am

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 3:42pm

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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DelLondon

09/28/25 3:56am

I've encountered transmission oil leaks several times over the years while driving. Last time, the oil seal on my old car had aged - rubber components tend to become brittle and leak after about ten years, which was fixed by replacement. I've also experienced oil dripping due to an improperly tightened oil pan screw. When oil leaks, rough shifting and unusual noises serve as warning signs. I've developed the habit of regularly checking oil levels and changing transmission fluid every two to three years to prevent seal failures. While newer cars have better technology, extra caution is needed with older vehicles - never ignore oil stains in parking spots. Early detection leads to simpler repairs, saving both trouble and peace of mind.

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