Table of Contents
The Eaton TrueTrac differential is a popular choice among Subaru WRX enthusiasts looking to enhance their vehicle’s performance. This guide provides a comprehensive step-by-step installation process along with a cost breakdown to help you successfully install the TrueTrac differential.
Tools and Materials Needed
- Socket set
- Torque wrench
- Jack and jack stands
- Drain pan
- Gear oil
- Eaton TrueTrac differential
- Gasket or RTV sealant
- Shop manual for torque specifications
Step-by-Step Installation Process
Step 1: Preparation
Before starting the installation, ensure that your Subaru WRX is parked on a flat surface. Engage the parking brake and gather all necessary tools and materials. Make sure to wear safety gloves and goggles for protection.
Step 2: Remove the Rear Differential Cover
Using a socket set, remove the bolts securing the rear differential cover. Carefully pry the cover off and allow the old gear oil to drain into a drain pan. Clean the mating surface of the differential housing to ensure a good seal.
Step 3: Remove the Old Differential
Once the cover is removed, take out the old differential by removing the ring gear bolts and the pinion gear. Make sure to keep track of all the bolts and parts for reassembly.
Step 4: Install the Eaton TrueTrac Differential
Position the Eaton TrueTrac differential into the housing. Align it properly and install the ring gear using the original bolts. Torque them to the manufacturer’s specifications found in your shop manual.
Step 5: Reassemble the Differential
Replace the differential cover with a new gasket or apply RTV sealant. Secure the cover by tightening the bolts in a crisscross pattern to ensure even pressure. Refer to the shop manual for the correct torque settings.
Step 6: Add Gear Oil
Fill the differential with the appropriate gear oil as specified by the manufacturer. Check the fluid level to ensure it is at the correct height.
Step 7: Test Drive
After completing the installation, take your Subaru WRX for a test drive. Listen for any unusual noises and check for leaks around the differential cover. Make sure the vehicle handles properly.
Cost Breakdown
Understanding the costs involved in the installation of the Eaton TrueTrac differential can help you budget effectively. Below is a breakdown of the expected costs:
- Eaton TrueTrac differential: $600
- Gear oil: $50
- Gasket or RTV sealant: $10
- Tools (if not already owned): $200
- Labor (if hiring a mechanic): $300
Total Estimated Cost (DIY): $660
Total Estimated Cost (with Labor): $960
Conclusion
Installing an Eaton TrueTrac differential on your Subaru WRX can significantly improve performance and handling. By following this step-by-step guide and understanding the costs involved, you can make an informed decision on whether to tackle the installation yourself or seek professional help. Enjoy the enhanced driving experience!