Checking your transmission fluid is an essential part of maintaining your car’s health. It’s a relatively simple task, but there’s a crucial question that often comes up⁚ should your car be running when you check the fluid level?
The Short Answer⁚ No
In most cases, you should not check your transmission fluid with the engine running. Here’s why⁚
- Safety⁚ Working with hot fluids can be dangerous. A running engine means a hot transmission, increasing the risk of burns.
- Accuracy⁚ When the engine is running, the transmission fluid is circulating, making it difficult to get an accurate reading of the fluid level.
- Fluid Pressure⁚ Running the engine increases pressure within the transmission system, potentially forcing fluid out of the dipstick tube and giving you a false reading.
The Exception⁚ Some Automatic Transmissions
While the general rule is to check the fluid with the engine off, there are some exceptions. Certain automatic transmissions, particularly older models, may require you to check the fluid with the engine running and the car idling.
Always consult your owner’s manual. It will provide specific instructions on how to check the fluid level for your particular vehicle.
How to Check Transmission Fluid
- Park the car on level ground.
- Engage the parking brake.
- Let the engine cool down completely.
- Locate the transmission dipstick. It’s usually marked with a “T” or “Trans” and is often found near the back of the engine.
- Wipe the dipstick clean with a clean cloth.
- Insert the dipstick fully and then remove it.
- Check the fluid level. The fluid level should be within the “Full” marks on the dipstick.
- If the fluid is low, add the correct type of transmission fluid. Never overfill.
- Check the fluid color and condition. The fluid should be bright red or pink and should be free of debris or burnt smell.
When to Check Transmission Fluid
It’s a good idea to check your transmission fluid regularly, especially if you notice any of the following symptoms⁚
- Slipping or delayed shifting
- Rough shifting
- Burning smell
- Fluid leaks
- Unusual noises from the transmission
Important Note⁚
If you are unsure about checking your transmission fluid or if you suspect a problem with your transmission, it’s best to take your car to a qualified mechanic for diagnosis and repair.