1. Screws are too tight: Sometimes the aging or the use of too much time will make the parts in the gearbox and the oil combined together, resulting in the screws being difficult to remove. At this time, you can use the appropriate amount of strength wrench or electric wrench, gently screw, but pay attention to the size of the strength to avoid damage to the screws.
2. Damaged threads: If the screws can not be unscrewed, it may be that the threads have been damaged, resulting in difficulties. In this case, it is best not to force the screws, you can use professional repair tools to deal with it.
3. Rusted oil screws: If the oil screws have not been disassembled for a long time, it may lead to rust and clogging, you need to use rust remover to clean it, and then disassemble the operation, to prevent the threads from being damaged due to too much strength.
If it is very difficult to remove the oil screws, it is recommended to seek the help of a professional auto mechanic. They have more repair experience and specialized skills and can solve the problem better. In addition, the repair and maintenance of the transmission requires great care and caution, and it is best not to try it easily if you do not have the relevant experience, so as not to cause more serious damage!