Do you check transmission fluid with the car running?
To check the transmission fluid level, it is generally recommended to do so with the car running. This allows the fluid to circulate and provide an accurate reading of the fluid level. However, there are some important considerations and steps to follow when checking the transmission fluid with the engine running.
Why Check Transmission Fluid with the Engine Running?
Checking the transmission fluid level with the engine running serves a few key purposes:
- Fluid Circulation: With the engine running, the transmission fluid is circulating through the system, ensuring an accurate reading of the fluid level. This is important because the fluid level can vary depending on the temperature and circulation.
- Proper Temperature: The transmission fluid needs to be at the correct operating temperature, typically between 80-100°C (176-212°F), to get an accurate reading. Running the engine allows the fluid to reach this optimal temperature.
- Identifying Leaks: Checking the fluid level with the engine running can also help identify any potential leaks in the transmission system, as the fluid will be under pressure and any leaks will be more noticeable.
By following the proper steps to check the transmission fluid with the engine running, you can ensure an accurate assessment of the fluid level and the overall health of the transmission system.
Steps to Check Transmission Fluid with the Engine Running
Here are the typical steps to check the transmission fluid level with the engine running:
- Park the vehicle on a level surface and apply the parking brake.
- Run the engine until it reaches normal operating temperature, typically 5-10 minutes.
- Locate the transmission fluid dipstick, usually under the hood or near the transmission.
- With the engine still running, remove the dipstick and wipe it clean with a lint-free cloth.
- Reinsert the dipstick fully, then remove it again to check the fluid level. The level should be within the "hot" or "run" range indicated on the dipstick.
- If the level is low, add the recommended transmission fluid in small increments until the level is within the proper range.
- Avoid overfilling the transmission, as this can cause damage to the system.
By following these steps, you can accurately check the transmission fluid level with the engine running, ensuring the proper operation and longevity of your vehicle's transmission.
