Clutch Replacement - [Subaru WRX 2017]: A Complete Guide for Enthusiasts.

Replacing the clutch on your 2017 Subaru WRX is a challenging but rewarding task, especially if you're passionate about maintaining your vehicle's performance. This guide will walk you through the process, offering tips, tools needed, and step-by-step instructions. With the right preparation, you can successfully replace the clutch and get your WRX back on the road.

1. Understanding the Importance of Clutch Replacement

The clutch is a critical component in your WRX's drivetrain, responsible for transmitting power from the engine to the transmission. Over time, the clutch can wear out, leading to slipping, difficulty in shifting gears, and a decrease in overall performance. For a Subaru WRX, particularly a 2017 model, replacing the clutch around 70,000 to 100,000 miles is common, depending on driving habits and conditions.

2. Signs Your Subaru WRX Needs a New Clutch

• Slipping Clutch: If you notice the engine revving without a corresponding increase in speed, it may indicate a slipping clutch.
• Hard Shifting: Difficulty in shifting gears can be a sign that the clutch is not fully disengaging.
• Unusual Noises: Grinding or squealing noises during gear changes could be related to clutch wear.
• Spongy Clutch Pedal: A soft or spongy feel in the clutch pedal might signal the need for replacement.

3. Tools and Parts Needed

Before diving into the clutch replacement, gather the necessary tools and parts:

• Jack and Jack Stands
• Socket Set (10mm to 24mm)
• Torque Wrench
• Screwdrivers (Flathead and Phillips)
• Clutch Alignment Tool
• Flywheel Holder Tool
• Transmission Jack
• New Clutch Kit (including clutch disc, pressure plate, and release bearing)
• New Flywheel (optional but recommended)

4. Preparation Steps

4.1. Safety First

• Park on a Level Surface: Ensure your WRX is parked on a level surface and engage the parking brake.
• Disconnect the Battery: Remove the negative battery terminal to prevent any electrical accidents.
• Lift the Vehicle: Use a jack to lift the front of the car and secure it with jack stands. Ensure the vehicle is stable before proceeding.

4.2. Removing the Transmission

• Drain Transmission Fluid: Start by draining the transmission fluid into a suitable container.
• Remove the Exhaust: Disconnect the exhaust system from the catalytic converter to the mid-pipe to gain access to the transmission.
• Disconnect Drive Shaft: Unbolt the drive shaft from the transmission and move it aside.
• Remove the Starter Motor: Unbolt the starter motor and carefully set it aside, ensuring it doesn't hang by the wiring.
• Unbolt Transmission: Use the socket set to unbolt the transmission from the engine block. A transmission jack will help in safely lowering it.

5. Clutch Replacement Procedure

5.1. Removing the Old Clutch

• Inspect the Flywheel: Once the transmission is out of the way, inspect the flywheel for any signs of wear or damage. Resurfacing or replacing the flywheel is recommended.
• Remove Pressure Plate and Clutch Disc: Use the appropriate socket to unbolt the pressure plate, then carefully remove it along with the clutch disc.

5.2. Installing the New Clutch

• Install New Flywheel (If Applicable): If you're replacing the flywheel, bolt the new one in place using a torque wrench. The torque specification for the flywheel bolts is typically 52 ft-lbs for the WRX.
• Align the Clutch Disc: Place the new clutch disc against the flywheel, using the clutch alignment tool to ensure proper alignment.
• Attach Pressure Plate: Bolt the pressure plate onto the flywheel over the clutch disc. Tighten the bolts in a star pattern to ensure even pressure.

6. Reinstalling the Transmission

• Lift the Transmission: Use the transmission jack to carefully lift the transmission back into position.
• Bolt Transmission to Engine: Reattach the transmission to the engine, tightening the bolts to the factory-specified torque.
• Reconnect Components: Reinstall the starter motor, drive shaft, and exhaust system. Refill the transmission fluid.

7. Final Steps

7.1. Test the Clutch Pedal

• Reconnect the Battery: Reattach the negative battery terminal.
• Test Pedal Engagement: Press the clutch pedal to check for proper engagement. It should feel firm and responsive.

7.2. Road Test

• Initial Check: Start the engine and let it idle for a few minutes. Shift through the gears to ensure smooth operation.
• Test Drive: Take the WRX for a test drive, paying close attention to clutch engagement, shifting smoothness, and any unusual noises.

8. Maintenance Tips for Longevity

• Avoid Riding the Clutch: Keep your foot off the clutch pedal when not shifting to prevent premature wear.
• Regular Inspections: Periodically check the clutch fluid and adjust the clutch pedal if necessary.
• Timely Replacements: If you notice signs of wear, address them promptly to avoid further damage.

9. Conclusion

Replacing the clutch in your 2017 Subaru WRX can be a daunting task, but with the right tools and a methodical approach, it’s certainly achievable for an experienced DIYer. Not only will you save on labor costs, but you'll also gain a deeper understanding of your vehicle’s mechanics.

FAQs

Q1: How long does it take to replace the clutch on a 2017 Subaru WRX?

• A: The process typically takes around 6 to 8 hours, depending on your experience level and the tools available.

Q2: Can I reuse the old flywheel?

• A: While it's possible to reuse the flywheel, it’s generally recommended to replace or resurface it to ensure a smooth clutch operation and avoid future issues.