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Changing front differential & all-wheel drive controller oil on
Porsche 911 (2005-2012)

Maintenance Interval: Every 12 years or 120k miles (180k kilometers)

Dealer Cost: ~$500

DIY Cost: ~$200 (including tools)

Difficulty: Medium 

Repair Time: 3 hours

Overview:

Changing your differential and all-wheel driver controller oil is important to keep your drivetrain smooth. This is a easy do-it-yourself as long as you have the proper tools and ability to get your vehicle off the ground safely. If you are unsure, please visit a certified Porsche dealership or independent mechanic.

These service instructions apply to:

  • 2005-2012 Porsche 911 (all-wheel drive models)

Instructions:

Here are detailed step-by-step instructions to help you. For an overview, you can check out the above video from YouTube user, Jim Wong.
 

  1. Before you get started, ensure your engine and transmission are cool, so you don't burn yourself!
     

  2. Gather parts and tools.
     

  3. Get vehicle off the ground either using a vehicle lift or a jack and jack stands. Note: Ensure your car is level.
     

  4. Remove the front underbody panel which is held on by 10mm bolts and T25 screws.
     

  5. With the front underbody panels off, you now will see the front differential and all-wheel driver controller.
     

  6. Starting with the front differential, locate and remove the 17mm fill bolt FIRST. You don't want to drain your fluid before knowing you can get the fill plug off. If you cannot remove the fill bolt, STOP. If you can remove it, proceed to the next step.
     

  7. Next, locate the 17mm drain bolt and remove it. Be sure to place a drain pan below.
     

  8. Let the oil drain for 15 minutes, then re-install the drain bolt. Tighten to 22 ft-lbs. Note: It does not have a crush washer.
     

  9. Add ~1.2 liters of Porsche 75W-90 gear oil to the fill port using a fluid transfer pump; once the oil starts to drip, you have reached capacity. Re-install fill bolt and tighten to 22 ft-lbs.
     

  10. Now, move onto the AWD controller and follow the same procedures as the differential. The AWD controller uses ~0.8 liters. Torque the drain and fill bolts to 22 ft-lbs.
     

  11. Reinstall everything.
     

  12. Clean up your work area and put away your tools.
     

  13. You're all done!