Check Transmission Fluid: Car On or Off?

Introduction

Checking transmission fluid is an important part of regular car maintenance. But when it comes to checking the fluid level, there’s a common question: should you check it with the car on or off?

The answer depends on the type of transmission your car has. In this article, we’ll explore the differences between checking transmission fluid on or off and provide detailed instructions for each type of transmission.

Types of Transmissions

There are two main types of transmissions in cars: automatic and manual.

Automatic Transmissions

Automatic transmissions use planetary gears and hydraulics to shift gears automatically. They are the most common type of transmission in modern cars.

Manual Transmissions

Manual transmissions require the driver to manually shift gears by using a gear stick and clutch pedal. They are less common than automatic transmissions, but are often found in sports cars and performance vehicles.

Checking Transmission Fluid Level

The procedure for checking transmission fluid level varies depending on the type of transmission.

Automatic Transmissions

1. Park the car on a level surface.
2. Shift the transmission into “Park”.
3. Open the hood and locate the transmission dipstick. It is usually painted red or yellow and has a ring or handle for easy removal.
4. Pull out the dipstick and wipe it clean with a rag.
5. Reinsert the dipstick fully into the transmission.
6. Pull out the dipstick again and check the fluid level. The fluid should be between the two marks on the dipstick: the “full” and “add” marks.

Manual Transmissions

1. Park the car on a level surface.
2. Turn off the engine and allow it to cool down.
3. Locate the transmission fluid fill plug, which is usually on the side of the transmission.
4. Remove the fill plug and check the fluid level. The fluid should be at the bottom of the fill hole.
5. If the fluid level is low, add fluid through the fill hole until it reaches the bottom of the hole.
6. Replace the fill plug and tighten it securely.

When to Check Transmission Fluid

It’s recommended to check your transmission fluid level every 30,000 miles or so, or according to your vehicle’s maintenance schedule.

However, there are some signs that may indicate a problem with your transmission fluid, such as:

• Leaking fluid
• Slipping gears
• Grinding noises
• Check engine light

If you notice any of these signs, it’s important to have your transmission checked by a qualified mechanic as soon as possible.

Conclusion

Checking transmission fluid is a simple but important part of car maintenance. By following the instructions in this article, you can ensure that your transmission fluid is at the correct level and that your car is running smoothly.