It is difficult to search RennList. And with the differences between 997.1, 997.2 their respective 4 wheel drives and turbos, I am confused.

I have a 2010 997.2 turbo. Can someone please tell me what it has: AWD controller, front diff, rear diff and PDK. What’s combined. The replacement fluids and the suggested miles/time period. This will be a winter project. Any relevant DIY pages or videos?

 

From the reading I've done, all 4 of those have different fluids. I recently bought one too and I've actually been struggling with the same issue and cannot find any good write ups.

In the maintenance schedule book i believe 2 or 3 of the 4 are at the 12 year mark which would be post due if it hasn't been done on your car. The clutch fluid is every 6 years or 60k, i think that also requires a new pan because the filter is part of the pan. Fcp sells a maintenance kit that everything you need, im going to be doing some of it soon, I'll write up what i can unless someone knows of an existing wire up. The pdk service ill be having an porsche indy shop so because you need a piwis to put in fill mode, and that would be expensive to screw up.

If you find any good write ups please post here for me too

This one may help
https://rennlist.com/forums/997-turb...id-change.html

 

Here's the maintenance checklist and intermediate maintenance checklist for a 997.2 Turbo

 

Notes on the fluids from my saga getting mine changed. Takeaway is don’t assume the Porsche dealer knows what they are doing, so be well prepared going in. It doesn’t help that the service docs use confusing terminology.

https://rennlist.com/forums/997-turb...id-or-two.html

PV997 has the authoritative thread on all things PDK. It’s a sticky thread on the 997 non-turbo forum.

 

This thread might be useful if you want to do the PDK service

https://rennlist.com/forums/997-foru...-change-2.html

This looks to be useful for the front diff

https://rennlist.com/forums/997-foru...ial-fluid.html

 

Thanks, guys. The information and references to prior discussions was most helpful. I cut and pasted from rennlist and from ecarguides.com. In case it helps someone else, here is my summary: I hope it fits.

2010 Turbo Drive Train - The Four Fluids

1&2: PDK -- Clutch & Gear.

There are two different fluid chambers that use different fluids and perform different functions.
.

• PDK/Clutch fluid - This is in the compartment closer to the engine and is a hydraulic fluid used for clutch engagement and moving the gear shift rods. It's relatively low viscosity and is amber colored, like watery honey. The service interval is 60k miles or 6 years for the 997 and it uses Pentosin FFL-3 Full Synthetic Double Clutch Transmission Fluid. The Pentosin FFL 3 is for the clutch side of the PDK.
• Gear oil fluid - This is in the compartment further from the engine and is traditional gear oil used to lube the gears within the gearbox. It's much heavier viscosity and is darker in color, closer to brown. The service interval is 120k miles or 12 years for both the 997 and 991 and it's a 75W-90 composition lubricant.

The PDK transmission is a combination of a manual and automatic transmission. As a result, the transmission uses both manual transmission oil and automatic transmission fluid (ATF). This is a source of confusion for many Porsche owners because Porsche calls for both a “PDK transmission oil change” and a “PDK clutch oil change”. This paragraph is on the PDK transmission oil, which uses manual transmission fluid. You DO NOT want to put ATF fluid into the wrong part of the transmission.

PDK Pan Replacement & Clutch Fluid Change

Although the clutch fluid reservoir holds 5.2 liters when bone dry (from the factory), only a bit over 3 liters comes out when you drain it via the plug. (Quite a bit remains in the bottom of the pan, the hydraulic system, and the fluid cooler.)

The PDK gear oil fill is 3-4L, not one. And some of the Porsche literature calls it the rear diff as it takes the same fluid as the front diff. But a just more fluid. And I would have them show you what plugs they used to drain and fill for everything. My SA and tech got the PDK fill plug confused with another unserviceable plug. And make sure when they do the front they get the diff and AWD controller correct as they take 2 different fluids.

PDK Fluid = Clutch Fluid = Pentosin FFL3.

The Mobilube PTX is for the gearset side of the PDK transmission. The Pentosin FFL 3 is for the clutch side of the PDK. Two completely independent oil reservoirs in the PDK.

Here are the part numbers I ordered:

• PDK Transmission Pan Kit (contains fasteners and drain plug) - 9G1-321-025-01
• PDK Transmission Fluid Fill Plug - 9G1-321-805-00
• PDK Transmission Fluid, 1 liter - 000-043-305-13 (need 6 liters)

• PDK Gear Oil Drain Plug - 9G1-321-805-00
• PDK Gear Oil Fill Plug - 9G1-321-805-00
• PDK Gear Oil - SAE 75W-90, 1 liter - 000-043-305-49 (need 3 liters)

Six liters on the transmission (clutch) fluid is for a dry fill. For a fluid change it will be much less than four even with a pan drop. Quite a bit of fluid stays in the hydraulic system and the transmission oil cooler.

PDK Pan Replacement & Clutch Fluid Change

• I followed the service manual procedure for "WM 370255 Changing ATF (clutch fluid)" & "WM 375519 Removing and installing ATF pan" (attached)
• My replacement pan kit (9G1-321-025-01) included the drain plug already assembled in the pan but they forgot the fasteners. I ended up purchasing the (13) M6 x 25 torx aluminum fasteners locally (9G1-321-801-00).
• There will be spills, put a big tarp down catch fluid. The pan will contain 0.25 - 0.5 liter of oil even after you drain it and the PDK pan internals will drip fluid until you get the new pan installed.
• My old PDK clutch fluid, pan and filter looked good also. But again... only 45K miles
• With a PIWIS, the fill is straight-forward -- no surprises
• As @PV997 mentioned, you won't need 6 liters for this job. My initial fill was 4 liters, then I put the car into fill mode with the PIWIS (pictures below) and was able to add another 0.5 liters

IMPORTANT:

⁃ Ensure that the transmission is filled with a minimum amount of oil

⁃ Start the engine

In order to continue, the transmission oil temperature must be 30 to 50°C

the maintenance book states:
every 6 years - replace clutch oil
every 12 years - replace transmission/gear oil

2 questions:
- gear oil = transmission oil? Correct
- replacing clutch oil will require replacing the oil pan too? The PDK filter is part of the pan. In order to replace the filter, you have to replace the pan. I wouldn’t replace the filter (and pan) at the 6-year mark.

The confusion here is because the service interval doubled when the 991 was introduced. The 997 is every 60K miles or 6 years with the filter in the non-reusable pan being replaced every other interval. The gear oil (differential) is every 120K miles or 12 years.

Gear/Transmission Oil Change

• This is no different any other gear oil change, that said, I followed the service manual procedure "WM 399055 Changing oil for final drive (with transmission oil)" (attached)
• The old gear oil looked clean, but with only 45K miles I guess that is to be expected.
• I bought pumps for $7/ea. 1 for the gear oil and 1 for the PDK clutch fluid. They worked great; would recommend. I tossed them both when I was done.
• 9G1-321-805-00 is the right part number for the gear oil drain and fill plugs (also used for the PDK clutch fluid fill plug); they have a green rubber o-ring on them.
• I had a slight pucker moment, when the pump started to make the sucking sound as it reached the bottom of the 3rd liter and the fill hole hadn't start to overflow yet. Thankfully on the last pump it did start to overflow. It might be worthwhile to pick up 4 liters of gear oil "just in case"
• The Mobilube PTX is for the gearset side of the PDK transmission.

3. All Wheel Drive Controller:

6 years, 60,000 miles

https://ecarguides.com/maintenance-g...odel_year=2010

Parts Required:

• Porsche All-Wheel Drive Controller Oil, 1 Liter - P/N: 00004330300 (1 liter required)

Torque Specs & Fluid Capacities:

All-wheel drive controller drain bolt: 22 ft-lbs
All-wheel drive controller fill bolt: 22 ft-lbs
AWD controller capacity: ~0.8 liters

Step 3: Remove the front underbody plastic panel.

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

ˇ Be sure to store the fasteners in a container, so you don’t lose them.

ˇ With the front underbody panel off, you now will see the all-wheel drive controller, which is just behind the front differential.

Step 4: Remove the all-wheel drive controller fill bolt.

ˇ Locate the all-wheel drive controller as shown in this video.

ˇ Using the 17mm swivel socket, remove the fill bolt FIRST, which is located ABOVE the drain bolt.

ˇ IMPORTANT: If you cannot remove the fill bolt, STOP.

Step 5: Drain the all-wheel drive controller.

ˇ Place a drain pan below the all-wheel drive controller drain bolt.

ˇ Remove the drain bolt with a 17mm socket.

ˇ Allow the all-wheel drive controller oil to drain for 15 minutes.

Step 6: Fill the all-wheel drive controller with new oil.

ˇ Re-install the all-wheel drive controller drain bolt and torque it 22 ft-lbs.

ˇ Note: It does not have a crush washer.

ˇ Add ~0.8 liters of Porsche transmission oil into the fill port using a fluid transfer pump

ˇ As long as your car is level, you’ve reached capacity once the oil starts to drip.

ˇ Once the oil starts to drip, you have reached capacity; note your car needs to be level.

ˇ Re-install fill bolt and torque it to 22 ft-lbs.

4. Front Diff:

https://rennlist.com/forums/997-foru...ial-fluid.html

Local Indy just replaced my front diff and awd controller oil with the 75W90. I have a 997.2 C4S. And since realized it needs the 75W80 from Porsche.

https://ecarguides.com/maintenance-g...odel_year=2010

12 years, 120,000 miles

Torque Specs & Fluid Capacities:

Front differential drain bolt: 22 ft-lbs
Front differential fill bolt: 22 ft-lbs
Front differential oil capacity: 0.9 liter

Parts Required:

• Porsche 75W-90 Gear Oil, 1 Liter - P/N: 99991754600 (2 liters required)

Step 6: Fill the front differential with new oil. (Steps 3-5 same as above)

ˇ Re-install the drain bolt and torque it to 22 ft-lbs; it does not have a crush washer.

ˇ Add ~0.9 liter of Porsche gear oil into the fill port using a fluid transfer pump

ˇ As long as your car is level, you’ve reached capacity once the oil starts to drip.

ˇ Re-install fill bolt and torque it to 22 ft-lbs.