Can You Add Transmission Fluid While the Car Is Running?

Yes, you can add transmission fluid while the car is running, but it is not recommended.

There are a few reasons why it is not recommended to add transmission fluid while the car is running:

1. The transmission fluid may not circulate properly if the car is running, which could cause the transmission to overheat.
2. Adding transmission fluid while the car is running can cause the fluid to overflow, which could lead to leaks or other problems.
3. It is difficult to determine the correct amount of transmission fluid to add while the car is running, which could lead to overfilling or underfilling the transmission.

If you need to add transmission fluid, it is best to do so with the car turned off and the transmission in park. You should also check the transmission fluid level regularly to ensure that it is at the correct level.

How to Add Transmission Fluid

1. Park the car on a level surface and turn off the engine.
2. Locate the transmission fluid dipstick. It is usually located on the side of the transmission.
3. Pull out the dipstick and wipe it clean with a rag.
4. Reinsert the dipstick into the transmission and pull it out again.
5. Check the fluid level on the dipstick. It should be between the “full” and “add” marks.
6. If the fluid level is low, add fluid until it reaches the “full” mark.
7. Reinsert the dipstick and tighten it.
8. Start the engine and let it idle for a few minutes.
9. Check the transmission fluid level again and add fluid if necessary.

It is important to note that the transmission fluid level may vary slightly depending on the temperature of the fluid. If you are unsure about the correct fluid level, consult your vehicle’s owner’s manual.

Conclusion

Adding transmission fluid while the car is running is not recommended, but it is possible. If you do need to add fluid, be sure to do so with the car turned off and the transmission in park. Check the fluid level regularly to ensure that it is at the correct level.