Checking your car’s transmission fluid is an essential part of regular maintenance, but there’s a common question that arises⁚ should you check it with the engine on or off? The answer depends on your vehicle’s type of transmission.
Automatic Transmissions
For most modern automatic transmissions, you should check the fluid level with the engine running. This allows the transmission fluid to circulate and reach its proper operating temperature, ensuring an accurate reading. Here’s how to do it⁚
- Park your car on a level surface and engage the parking brake.
- Start the engine and let it idle for a few minutes to warm up the fluid.
- Locate the transmission dipstick, which is typically near the engine or on the driver’s side of the car.
- Pull out the dipstick and wipe it clean with a clean cloth.
- Reinsert the dipstick fully and then pull it out again.
- Check the fluid level on the dipstick. It should be between the “full” and “add” marks.
- If the fluid level is low, add transmission fluid of the correct type, as recommended by your car’s owner manual.
Manual Transmissions
For manual transmissions, you should check the fluid level with the engine off. This is because manual transmissions don’t have a dipstick that reaches the fluid level when the engine is running. Instead, they typically have a fill plug that allows you to add fluid as needed.
- Park your car on a level surface and engage the parking brake.
- Locate the transmission fill plug, which is usually on the side or bottom of the transmission case.
- Remove the fill plug and check the fluid level.
- If the fluid level is low, add transmission fluid of the correct type, as recommended by your car’s owner manual.
- Replace the fill plug and tighten it securely.
Important Notes
- Always refer to your car’s owner manual for specific instructions on how to check your transmission fluid.
- Check the color and smell of the fluid. Transmission fluid should be a reddish-brown color and have a slightly sweet smell. If it’s dark brown or burnt, it may need to be replaced.
- If you’re unsure about checking your transmission fluid, it’s best to have it done by a qualified mechanic.
By following these simple steps, you can ensure your car’s transmission is properly lubricated and functioning optimally.