Possible causes of automatic transmission oil leakage after replacing the oil seal:
* Incorrect oil seal installation: Make sure the oil seal is installed correctly, with the right side facing out and without any kinks or damage.
* Worn or damaged shaft: Check the transmission shaft for wear or damage that could cause oil leakage.
* Improperly tightened seal: Over-tightening or under-tightening of the seal can cause leakage. Observe the tightening torque specified in the manual.
* Defective transmission fluid: Make sure that the transmission fluid is of the correct type and quality and that there is no water or metal shavings in it.
* Faulty seals or gaskets: Check other gaskets and seals in the automatic transmission system for leaks or damage.
* Excessive pressure in the system: Determine if there is excess pressure in the automatic transmission system, which can lead to leaks from the seals.
* Problems with internal automatic transmission components: Oil leaking from the seal can be a sign of internal problems with the automatic transmission, such as worn bearings or a damaged housing.
Solution:
1. Check the installation of the oil seal and shaft: Make sure the oil seal is installed correctly and that the shaft is not worn or damaged.
2. Check the tightness of the oil seal: Tighten the oil seal to the specified torque.
3. Change transmission fluid: Use the correct transmission fluid and check for impurities.
4. Check seals and gaskets: Inspect the automatic transmission system for leaks from other seals or gaskets.
5. Automatic transmission system diagnostics: If all of the above measures do not eliminate the leak, automatic transmission system diagnostics may be required to identify internal problems.