Unlock the Full Potential of Your Subaru: How to Change CVT Transmission Fluid for Maximum Efficiency

Subaru vehicles are known for their reliability and performance, but their Continuously Variable Transmissions (CVTs) can sometimes require a bit of extra attention. Keeping your CVT fluid fresh and clean is crucial for smooth shifting, optimal performance, and extended transmission life. This guide will walk you through the process of how to change CVT transmission fluid Subaru, empowering you to perform this maintenance task yourself and save money.

Understanding Your Subaru CVT

Before diving into the fluid change, it’s essential to understand the basics of your Subaru CVT. Unlike traditional automatic transmissions with gears, a CVT uses a belt and pulley system to provide a smooth, seamless power transfer. The transmission fluid acts as a lubricant and coolant, ensuring the belt and pulleys operate efficiently.

Why Change Your CVT Fluid?

Over time, CVT fluid degrades, losing its lubricating properties and accumulating contaminants. This can lead to:

• Rough shifting: The transmission may experience jerky or hesitant shifting.
• Reduced performance: The engine may struggle to accelerate smoothly.
• Transmission damage: Worn-out fluid can cause premature wear on the belt and pulleys.

Tools and Materials You’ll Need

To successfully change your Subaru CVT fluid, you’ll need the following:

• Subaru-approved CVT fluid: Refer to your owner’s manual for the recommended fluid type.
• Drain pan: A large pan to catch the old fluid.
• Torque wrench: For tightening bolts to the correct specifications.
• 10mm wrench or socket: For loosening the drain plug.
• 17mm wrench or socket: For loosening the fill plug.
• Funnel: For pouring new fluid into the transmission.
• Clean rags: For wiping up spills and cleaning tools.
• Gloves: To protect your hands from the hot fluid.

Preparation: Getting Your Subaru Ready

1. Park on a level surface and engage the parking brake.
2. Warm up the engine and transmission. Drive for a few minutes to allow the fluid to reach operating temperature.
3. Locate the drain plug and fill plug. Refer to your owner’s manual for their exact locations.
4. Place the drain pan underneath the drain plug.
5. Prepare a clean container to collect the old fluid.

Step-by-Step Guide to Changing Your CVT Fluid

1. Loosen the drain plug: Use the 10mm wrench or socket to carefully loosen the drain plug.
2. Drain the old fluid: Allow the fluid to drain completely into the drain pan.
3. Tighten the drain plug: Once the fluid has stopped draining, tighten the drain plug back to the correct torque specification. Refer to your owner’s manual for the specific torque value.
4. Loosen the fill plug: Use the 17mm wrench or socket to loosen the fill plug.
5. Fill with new fluid: Using the funnel, slowly pour the recommended amount of new CVT fluid into the transmission through the fill plug.
6. Tighten the fill plug: Once the fluid level reaches the fill plug hole, tighten the fill plug to the correct torque specification.
7. Check the fluid level: Start the engine and let it idle for a few minutes. Then, shut off the engine and re-check the fluid level. If necessary, add more fluid until it reaches the fill plug hole.
8. Clean up: Wipe up any spills and dispose of the old fluid properly.

Driving After the Fluid Change

Take your Subaru for a short test drive to ensure the transmission is shifting smoothly. If you notice any issues, check the fluid level again and ensure the fill plug is securely tightened.

Important Considerations

• Fluid type: Always use the specific CVT fluid recommended by Subaru for your model year. Using the wrong fluid can damage your transmission.
• Torque specifications: Refer to your owner’s manual for the correct torque values for both the drain and fill plugs. Overtightening these plugs can damage the transmission.
• Safety: Be careful when working with hot fluid and tools. Wear gloves and safety glasses to protect yourself.
• Professional help: If you’re uncomfortable performing this procedure yourself, it’s best to have a qualified mechanic do it.

Time to Say Goodbye (to Old Fluid and Transmission Problems!)

Changing your Subaru CVT fluid is a relatively simple maintenance procedure that can significantly extend the life of your transmission and keep it running smoothly. By following these steps, you can ensure your Subaru CVT stays healthy and performs at its best.

Frequently Discussed Topics

Q: How often should I change my Subaru CVT fluid?

A: Subaru recommends changing the CVT fluid every 60,000 miles or 4 years, whichever comes first. However, if you frequently drive in harsh conditions (e.g., towing, extreme temperatures), you may need to change it more often.

Q: What are the symptoms of low CVT fluid?

A: Low CVT fluid can cause rough shifting, slipping, and a whining noise from the transmission.

Q: Can I use regular automatic transmission fluid in my Subaru CVT?

A: No, you should never use regular automatic transmission fluid in a Subaru CVT. CVT fluid has specific properties that are essential for proper operation.

Q: What happens if I don’t change my CVT fluid?

A: Neglecting CVT fluid changes can lead to premature wear and tear on the transmission, resulting in costly repairs or even replacement.

Q: Can I add CVT fluid to my transmission without draining it?

A: It’s generally not recommended to add fluid without draining the old fluid. Adding fluid without draining can dilute the existing fluid and potentially worsen the problem.