Does Car Need to Be Running When Adding Transmission Fluid?

Introduction

When it comes to maintaining your car, checking and adding transmission fluid is an important task. But do you need to have the car running when you do this? The answer to this question depends on the specific type of transmission your car has. In this article, we’ll explore the different types of transmissions and whether or not the car needs to be running when adding transmission fluid.

Types of Transmissions

There are two main types of transmissions: manual and automatic. Manual transmissions require the driver to shift gears manually, while automatic transmissions do this automatically. Each type of transmission has its own unique requirements when it comes to checking and adding transmission fluid.

Manual Transmissions

For manual transmissions, it is not necessary to have the car running when checking or adding transmission fluid. The fluid level should be checked with the engine off and the transmission in neutral. To add fluid, simply remove the fill plug on the side of the transmission and pour in the appropriate amount of fluid. Be sure to check the owner’s manual for the specific type of fluid and amount required for your vehicle.

Automatic Transmissions

For automatic transmissions, it is generally recommended to have the car running when checking or adding transmission fluid. This is because the fluid level can vary depending on the temperature of the fluid. To check the fluid level, start the car and allow it to idle for a few minutes. Then, shift the transmission through all of the gears, ending in park. With the engine still running, pull out the dipstick and check the fluid level. If the fluid level is low, add fluid through the dipstick tube.

Exceptions

There are some exceptions to the general rules above. For example, some newer automatic transmissions may have a dipstick that can be checked without the car running. Additionally, some manual transmissions may require the car to be running when checking the fluid level. Always refer to your owner’s manual for the specific instructions on how to check and add transmission fluid for your vehicle.

Conclusion

Checking and adding transmission fluid is an important maintenance task for any car. Whether or not the car needs to be running when you do this depends on the type of transmission your car has. For manual transmissions, it is not necessary to have the car running. For automatic transmissions, it is generally recommended to have the car running. Always refer to your owner’s manual for the specific instructions on how to check and add transmission fluid for your vehicle.