Do You Put Transmission Fluid in with the Car Running?
Introduction
Maintaining your vehicle’s transmission is crucial for ensuring its longevity and optimal performance. One essential aspect of transmission maintenance is checking and replacing the transmission fluid regularly. However, there’s a common question that arises: should you put transmission fluid in with the car running? This article will explore the pros, cons, and proper procedure for adding transmission fluid to your vehicle.
Pros of Adding Transmission Fluid with the Car Running
* Warmer fluid: Running the car allows the transmission fluid to reach its operating temperature, making it easier to pour and circulate throughout the system.
* Easier to check fluid level: With the engine running, the transmission fluid will be pumped through the system, making it easier to check the level on the dipstick.
* Reduced risk of overfilling: When the engine is running, the fluid will expand, providing a more accurate indication of the correct level, reducing the chance of overfilling.
Cons of Adding Transmission Fluid with the Car Running
* Potential for spills and leaks: Adding fluid to the transmission with the engine running can increase the risk of spills and leaks if the dipstick is not properly inserted.
* Risk of engine damage: If the fluid level is too high, it can cause foaming and lead to transmission damage.
* Inaccurate fluid level reading: Running the car at certain engine speeds or gear positions can affect the fluid level reading on the dipstick, leading to an inaccurate measurement.
Proper Procedure for Adding Transmission Fluid
To ensure proper transmission fluid replacement, it’s important to follow the recommended procedure:
1. Check the Owner’s Manual: Refer to your vehicle’s owner’s manual for specific instructions and fluid requirements.
2. Park on a Level Surface: Park your vehicle on a level surface to ensure an accurate fluid level measurement.
3. Warm Up the Engine: Let the engine run for a few minutes to bring the transmission fluid to its operating temperature.
4. Check Fluid Level: With the engine running, pull out the transmission dipstick and wipe it clean. Reinsert it fully into its tube and pull it out again to check the fluid level.
5. Add Fluid as Needed: If the fluid level is low, add fluid in small increments using a funnel. Check the fluid level on the dipstick after each addition.
6. Avoid Overfilling: Overfilling the transmission can cause problems. Add fluid until the level reaches the “Full” mark on the dipstick.
7. Reinsert the Dipstick: Once the fluid level is correct, firmly insert the dipstick back into its tube.
8. Check for Leaks: After driving for a short distance, check for any leaks around the transmission.
When to Check and Replace Transmission Fluid
The frequency of checking and replacing transmission fluid varies depending on the vehicle and its usage. Refer to your owner’s manual for specific recommendations, but generally:
* Check fluid level: Check the transmission fluid level every 30,000 to 60,000 miles.
* Replace fluid: Replace the transmission fluid every 60,000 to 100,000 miles or as recommended by your mechanic.
Conclusion
While there are both pros and cons to adding transmission fluid with the car running, the recommended procedure is to check and replace the fluid with the engine off. This reduces the risk of spills, leaks, and inaccurate fluid level readings. By following proper procedures and regular maintenance intervals, you can ensure optimal transmission performance and longevity.
