Auto Gearbox Fix

Subaru Auto Gearbox Repair Steps

Our customer has a Subaru Legacy 2004 spec B . 

1. Diagnosing the Issue: we have identified the P1710 code, indicating a problem with the torque converter turbine speed signal circuit, often related to the valve body or its sensor.

2. Part Replacement Decision: Since replacing the valve body can be expensive and parts can be hard to find, we opted for a cost-effective sensor replacement as a trial, despite it being an unknown aftermarket part.

3. Gearbox Oil Drain: Ensure the vehicle is safe and at the right temperature before draining the gearbox oil. This step is critical for preventing contamination and ensuring a smooth fluid replacement.

4. Removing the Sump Pan: Carefully remove the sump pan to access the internal components.

5. Valve Body Extraction: This step is crucial as you’re exposing the internal workings of the gearbox. handling  the valve body components carefully to avoid further damage.

6. Sensor Replacement: Cut the old sensor wires and solder the new sensor in place, ensuring secure connections to prevent future issues.

7. Maintenance Tasks:

   - Change Gearbox Filter: This will help maintain fluid cleanliness and proper flow.

   - Clean Magnet and Sump Pan: Removing metal shavings or debris is essential for preventing future sensor failures.

8. Refilling Gearbox Oil: Use quality Motul gearbox oil and follow the manufacturer’s specifications for fluid capacity.

9. Bleeding Sequence: Complete the necessary bleeding procedure to eliminate air from the system, which is vital for optimal performance.

10. Road Testing: The moment of truth! Monitor the gearbox’s performance during a test drive to see if the issue has been resolved. Keep an eye on the sensor readings and any fault codes that might reappear.

Conclusion

So far so good customer has done 4-500 miles and no faults let's hope it stays like that :-)