Adding transmission fluid is a common maintenance task that many car owners can do themselves. However, one question that often arises is whether you should add fluid while the car is running or not. The answer is a resounding no. Here’s why⁚
Safety First
Adding transmission fluid to a running engine is incredibly dangerous. The fluid is hot and under pressure, and there’s a high risk of burns or serious injury if it spills or splashes. Additionally, adding fluid while the engine is running can create a fire hazard.
Accuracy and Efficiency
The transmission fluid level needs to be checked while the engine is at operating temperature but turned off. This allows the fluid to settle in the transmission pan for an accurate reading. Adding fluid while the engine is running can lead to an inaccurate reading and overfilling, which can damage the transmission.
Overfilling Risks
Overfilling the transmission can cause serious problems. Too much fluid can create excessive pressure within the system, leading to seals blowing, leaks, and even damage to internal components. This can result in costly repairs and potential transmission failure.
The Proper Procedure
Here’s how to add transmission fluid safely and correctly⁚
- Park your car on a level surface and engage the parking brake.
- Allow the engine to cool down completely.
- Locate the transmission dipstick. It’s usually marked with a “T” or “Tranny.”
- Wipe the dipstick clean with a rag.
- Insert the dipstick fully and then remove it to check the fluid level.
- If the fluid level is low, add fluid slowly until it reaches the “Full” mark on the dipstick. Use the correct type of transmission fluid for your vehicle.
- Reinstall the dipstick and check the level again after driving a short distance.
When to Consult a Professional
If you’re unsure about your transmission fluid level or how to add it, it’s best to consult a professional mechanic. They have the tools and expertise to ensure the job is done correctly and safely.
Remember, maintaining the correct transmission fluid level is crucial for smooth operation and longevity of your vehicle’s transmission. Always prioritize safety and follow the proper procedures. Never add transmission fluid while the engine is running.