The Subaru Ascent transmission fluid should typically be changed every 30,000 to 60,000 miles. It’s essential for maintaining the vehicle’s performance and longevity.

Maintaining your Subaru Ascent with regular transmission fluid changes is crucial for the vehicle’s smooth operation. The transmission fluid keeps the moving parts within your gearbox cool and lubricated. Undergoing this service at the prescribed intervals prevents wear and tear, which can lead to costly repairs down the line.

Not only does this process ensure the gears shift effortlessly, but it also contributes to fuel efficiency and reliability on the road. Whether embarking on long journeys or navigating daily commutes, a well-maintained transmission system is key to a seamless driving experience.

Remember to consult your owner’s manual for the specific maintenance schedule suited to your Subaru Ascent’s needs.

When To Change Transmission Fluid On Subaru Ascent

The lifespan and performance of your Subaru Ascent’s transmission hinges on regular maintenance, especially when it comes to changing the transmission fluid. Recognizing the optimal time for swapping out the old fluid can prevent costly repairs and maintain seamless gear shifts.

Let’s delve into the specifics of when and how often you should replace the transmission fluid in your Subaru Ascent.

Recommended Maintenance Schedule For Subaru Ascent

Maintaining a timely maintenance schedule is crucial for the well-being of your Subaru Ascent’s transmission. Subaru generally recommends checking your transmission fluid every 30,000 to 60,000 miles.

Nevertheless, referring to the owner’s manual for your specific Ascent model ensures adherence to Subaru’s guidelines for your vehicle’s maintenance needs.

Mileage Service
30,000 Miles Inspect transmission fluid level and condition
60,000 Miles Replace transmission fluid if necessary
90,000 Miles Inspect and replace transmission fluid if not done at 60,000 miles

Signs That Transmission Fluid Needs To Be Changed

Observing the behavior of your vehicle can early detect the need for a fluid change before you even hit the recommended mileage.

Here are the signs that indicate the transmission fluid in your Subaru Ascent may need attention.

  • Transmission Slips: When the vehicle hesitates or the engine revs during a gear change, it could be due to degraded fluid.
  • Erratic Shifting: Jerky or unpredictable shifts suggest the transmission fluid may be old or low.
  • Delayed Engagement: A delay before the car moves after putting it in gear can signal a fluid issue.
  • Darker Fluid Color: If the transmission fluid has turned from a bright, clear red to a dark brown or black, it is time for a change.
  • Burnt Smell: A burnt odor coming from your transmission fluid indicates overheating and the need for immediate attention.

How To Change Transmission Fluid In Subaru Ascent

Welcome to our detailed guide on changing transmission fluid in a Subaru Ascent. Performing regular maintenance, such as changing your vehicle’s transmission fluid, is essential for the longevity and performance of your Subaru Ascent.

This task might sound daunting to some, but with the right tools and a bit of know-how, you can tackle this critical job with confidence. Let’s dive into the essential steps to ensure your vehicle stays in top-notch condition.

Gather Necessary Tools And Materials

Before you begin the process, ensure you have all the required tools and materials at your disposal. Here’s what you’ll need:

  • Socket wrench: For removing the drain and fill plugs.
  • Drain pan: To capture the old fluid.
  • Gloves: To protect your hands from fluid and debris.
  • New transmission fluid: Refer to your Subaru Ascent’s owner manual for the specific type and quantity.
  • Funnel: For refilling the transmission without spills.
  • Torque wrench: To properly tighten the plugs back in place.
  • Shop rags: For clean-up and handling any spills.

Locate Transmission Fluid Drain Plug And Fill Plug

First, safely lift your Subaru Ascent using a jack and secure with jack stands. The transmission fluid drain plug is located on the transmission pan, while the fill plug is typically on the side of the transmission case. It’s vital to identify both plugs correctly to proceed with the fluid change.

Drain Old Transmission Fluid

Place the drain pan under the transmission fluid drain plug and use the socket wrench to carefully remove the plug. Allow the old fluid to completely drain out into the pan. This may take several minutes, so patience is key.

Once the fluid is fully drained, clean the drain plug of any metal shavings or debris, and re-secure it using the torque wrench to the specifications found in the service manual.

Refill With New Transmission Fluid

Next, remove the fill plug using the socket wrench. Take your funnel and begin pouring the new transmission fluid into the fill hole. It’s crucial to use only the type of fluid recommended by Subaru for the Ascent model to avoid any potential damage.

Fill the transmission with the amount specified in the service manual and then re-install the fill plug with the torque wrench.

Perform Final Checks And Test

With the new fluid in, it’s time for cleanup and final checks. Make sure the drain and fill plugs are secure and that there are no spills or leaks around the work area. Lower the vehicle carefully off the jack stands.

Start the engine, allowing it to run for a few minutes, and then check for any leaks under the vehicle. Take your Subaru Ascent for a short drive to circulate the new fluid, then check the fluid level once more, making any necessary adjustments.

Changing your Subaru Ascent’s transmission fluid is a straightforward process that can keep your vehicle running smoothly. Always refer to your owner’s manual for specific details and torque specifications for your vehicle’s components.

Proper maintenance not only extends the life of your Ascent but also provides a better driving experience.

Frequently Asked Questions

When Should I Change My Transmission Fluid In My Subaru Ascent?

Change your Subaru Ascent’s transmission fluid every 30,000 to 60,000 miles. Always consult your owner’s manual for the most accurate guidance.

How Often Does The Transmission Fluid Need To Be Changed In A Subaru?

Subaru recommends changing the transmission fluid every 30,000 to 60,000 miles, but refer to your owner’s manual for model-specific guidance. Regular maintenance ensures optimal performance and longevity for your Subaru’s transmission.

Does Subaru Recommend Changing Cvt Fluid?

Yes, Subaru recommends changing CVT fluid according to the maintenance schedule outlined in your vehicle’s owner’s manual. Regular changes help ensure optimal transmission performance.

How Often Should Differential Fluid Be Changed Subaru Ascent?

Change the differential fluid in a Subaru Ascent every 30,000 to 60,000 miles to ensure optimal performance and longevity. Always consult your owner’s manual for specific recommendations.


Maintaining your Subaru Ascent’s transmission fluid is vital for a smooth ride. Regular changes prevent costly repairs and ensure longevity. Trust your vehicle to experienced professionals and keep track of service intervals. Drive confidently, knowing you’ve given your Ascent the care it deserves.

Safe travels and happy driving!