Unlock the Secret to Smooth Shifting: How to Change Transmission Fluid in a Subaru Forester

Are you ready to tackle a crucial maintenance task for your Subaru Forester? Changing the transmission fluid is essential for keeping your car running smoothly and preventing costly repairs down the line. This guide will walk you through the process step-by-step, making it easier than you might think.

Why Change Transmission Fluid?

Transmission fluid, also known as ATF (Automatic Transmission Fluid), is the lifeblood of your car’s transmission system. It lubricates the gears, helps regulate temperature, and ensures smooth shifting. Over time, transmission fluid breaks down, loses its viscosity, and accumulates contaminants. This can lead to:

• Rough shifting: You might experience delayed or jerky shifts, especially when accelerating or decelerating.
• Transmission slipping: The transmission may slip out of gear, causing a loss of power.
• Transmission overheating: The fluid’s ability to dissipate heat deteriorates, potentially causing damage to the transmission.
• Transmission failure: In extreme cases, neglecting transmission fluid changes can result in complete transmission failure.

When to Change Transmission Fluid

Subaru recommends changing the transmission fluid in your Forester every 30,000 miles or 2-3 years, whichever comes first. However, several factors can influence the frequency, including driving conditions, climate, and the type of transmission fluid used.

Here are some signs that your transmission fluid may need changing sooner:

• Dark or burnt fluid: Healthy transmission fluid is typically reddish-brown. If it appears dark, black, or smells burnt, it’s a clear indication that it needs to be replaced.
• Fluid level is low: Check the dipstick regularly. If the fluid level is low, it could indicate a leak or excessive wear.
• Unusual noises: Listen for any grinding, whining, or clunking sounds coming from the transmission.

Gather Your Supplies

Before you begin, ensure you have the following items:

• Subaru Forester-specific transmission fluid: Refer to your owner’s manual for the recommended fluid type. Using the wrong fluid can cause damage to your transmission.
• New transmission fluid drain plug washer: This is essential for preventing leaks.
• New transmission fluid fill plug washer: Similar to the drain plug washer, this prevents leaks.
• Drain pan: This will catch the old transmission fluid.
• Socket wrench set: You’ll need sockets to remove the drain and fill plugs.
• Torque wrench: This is crucial for tightening the plugs to the correct specifications.
• Gloves: Protect your hands from the hot fluid.
• Safety glasses: Protect your eyes from splashes.
• Clean rags: For wiping up spills and cleaning parts.

Step-by-Step Guide to Changing Transmission Fluid

1. Warm Up the Transmission:

Drive your Forester for about 10 minutes to warm up the transmission fluid. This will make it thinner and easier to drain.

2. Park on a Level Surface:

Find a safe and level area to work on your car. Engage the parking brake and chock the rear wheels for added safety.

3. Locate the Transmission Drain Plug:

The transmission drain plug is typically located on the bottom of the transmission case. It may be a square or hex-shaped plug.

4. Remove the Drain Plug:

Using a socket wrench, carefully loosen and remove the drain plug. Be prepared for hot fluid to drain out.

5. Drain the Old Fluid:

Allow the old transmission fluid to drain completely into the drain pan. It’s best to let it drain for at least 10-15 minutes to ensure most of the fluid is out.

6. Replace the Drain Plug:

Inspect the drain plug for any damage or debris. If necessary, clean it thoroughly. Install a new washer on the drain plug and tighten it to the specified torque value found in your owner’s manual.

7. Locate the Transmission Fill Plug:

The fill plug is usually located on the side of the transmission case, near the top.

8. Remove the Fill Plug:

Carefully loosen and remove the fill plug.

9. Add New Transmission Fluid:

Pour the new transmission fluid into the fill hole until it starts to overflow. This is a good indication that the transmission is full.

10. Replace the Fill Plug:

Install a new washer on the fill plug and tighten it to the specified torque value.

11. Check the Fluid Level:

Start the engine and let it idle for a few minutes. Check the fluid level again using the dipstick. Add more fluid if necessary, ensuring it’s within the “Full” mark on the dipstick.

12. Clean Up:

Dispose of the old transmission fluid properly. Wipe up any spills and dispose of the used rags.

Post-Fluid Change Tips

• Drive Carefully: After changing the fluid, drive your Forester gently for the first few miles. This allows the new fluid to circulate throughout the transmission.
• Monitor for Leaks: Check for any leaks under your car after driving. If you notice any leaks, tighten the plugs or contact a mechanic.
• Record the Change: Keep track of the date and mileage of your transmission fluid change. This will help you schedule future changes.

Why You Should Consider a Professional

While changing transmission fluid is a relatively straightforward DIY task, some situations may warrant professional assistance. If you’re dealing with:

• Complex transmission issues: If your transmission is exhibiting severe problems, like slipping or grinding, a professional mechanic can diagnose and address the underlying issues.
• Limited experience: If you’re unfamiliar with automotive repairs or hesitant to work on your transmission, a mechanic can handle the task safely and efficiently.
• Specialized tools: Certain transmission fluid changes may require specialized tools or equipment that you may not have access to.

Time to Shift into a Smoother Ride

By regularly changing your Subaru Forester‘s transmission fluid, you can ensure its longevity and optimal performance. This simple maintenance task can save you from costly repairs and keep your car running smoothly for years to come.

What People Want to Know

1. Can I use any type of transmission fluid for my Subaru Forester?

No, it’s crucial to use the specific type of transmission fluid recommended by Subaru for your Forester model. Using the wrong type can cause damage to your transmission. Check your owner’s manual for the recommended fluid.

2. How often should I change the transmission filter?

The transmission filter should be changed every 60,000 miles or when the transmission fluid is changed, whichever comes first.

3. Can I change the transmission fluid myself?

While you can change the transmission fluid yourself, it’s essential to follow the instructions carefully and have the necessary tools. If you’re unsure, it’s best to consult a professional mechanic.

4. What are the signs of a failing transmission?

Signs of a failing transmission include rough shifting, slipping, overheating, unusual noises, and fluid leaks. If you experience any of these symptoms, consult a mechanic immediately.

5. Can I add transmission fluid to my Forester without draining the old fluid?

It’s not recommended to add transmission fluid without draining the old fluid. This can dilute the new fluid and reduce its effectiveness. It’s best to drain and replace the fluid completely.