Is it necessary to change transmission fluid at a 4S shop?
2 Answers
It is not mandatory to change transmission fluid at a 4S shop; it can also be done at external repair shops. The replacement interval for transmission fluid is approximately 40,000 to 80,000 kilometers. Transmission fluid is an oil product designed to maintain the cleanliness of the gear system. The functions of transmission fluid are: 1. Ensuring the normal operation of the transmission; 2. Extending the lifespan of the transmission components; 3. Providing effective lubrication at low temperatures; 4. Reducing oil loss under harsh operating conditions. The steps for changing transmission fluid are: 1. Remove the drain plug at the bottom of the transmission to drain the old fluid; 2. Remove the inner and outer casings of the transmission; 3. Take out the transmission fluid filter; 4. Remove the oil pan gasket and clean surrounding contaminants; 5. Use cotton threads to thoroughly clean the filtered transmission fluid assembly; 6. Add new fluid and complete the installation.
I really don't think transmission fluid must be changed at 4S shops, given the significant price difference. As an experienced driver with over a decade behind the wheel, trusted repair shops can handle it just fine. The key is confirming they use professional fluid exchange machines - don't cheap out with gravity drainage as it leaves old fluid residue. Also, the fluid specification must match your owner's manual, many major brands now carry OEM certifications. However, if your vehicle is still under warranty, third-party service might affect transmission warranty coverage - clarify this beforehand. When choosing a shop, verify their experience with your specific make to avoid becoming their test subject.
