The burning smell after changing the automatic transmission oil can be caused by several reasons:
1. Overfilling the oil: If the automatic transmission is filled with more oil than required, this can lead to overheating and a burning smell.
2. Contaminated Oil: If new oil is mixed with old contaminated oil, it can create sludge that can burn and cause a burning smell.
3. High friction: If the automatic transmission parts are worn out or the oil level is too low, it can lead to high friction, which can also cause a burning smell.
4. Cooling problems: If the automatic transmission cooler is clogged or faulty, it can cause the oil to overheat and create a burning smell.
5. Oil Leakage: Oil leakage from the automatic transmission can cause a fire if the oil comes in contact with hot engine components.
What to do:
* Check the automatic transmission oil level and make sure it is within the required range.
* Stop driving immediately if you smell a strong burning odor.
* Find a safe parking spot and turn off the engine.
* Check the automatic transmission for leaks or signs of overheating (for example, smoke, darkening of the oil).
*Consult a qualified mechanic to diagnose and repair the source of the burning odor.
Important: Do not ignore the burning smell after changing the automatic transmission oil, as this can lead to serious damage or even a fire.