FYI on costs for a PDK clutch oil change
03-24-2016, 11:56 PM
#46
Racer
The only data point I can offer is that I took in 6 liters of fluid and they used about 5 and a quarter of that (I got back about ¾ of one bottle). 2 quarts certainly isn't enough since quarts and liters are close to the same.
Did they provide a part number or brand name on the quoted fluids? On my change they used Pentosin FFL-3 (Porsche part 00004320729). There are reports from others that another fluid has been used in their changes. On the Pentosin bottle it warns against mixing with any other similar fluid. If guess if the Pentosin is thoroughly flushed out when using a different fluid it would be okay, but in my case I'm glad they stuck with Pentosin since it raises no concern there.
Did they provide a part number or brand name on the quoted fluids? On my change they used Pentosin FFL-3 (Porsche part 00004320729). There are reports from others that another fluid has been used in their changes. On the Pentosin bottle it warns against mixing with any other similar fluid. If guess if the Pentosin is thoroughly flushed out when using a different fluid it would be okay, but in my case I'm glad they stuck with Pentosin since it raises no concern there.
03-25-2016, 03:02 AM
#48
All wheel drive controller aka front differential.
03-25-2016, 11:53 AM
#50
04-17-2016, 08:33 AM
#51
Thanks for the very informative thread.
So at 6 years - do the pan needs to be replaced?
If the pan is replaced - does the gearbox oil from the cogs compartment drains out and has to be replaced too?
So at 6 years - do the pan needs to be replaced?
If the pan is replaced - does the gearbox oil from the cogs compartment drains out and has to be replaced too?
04-17-2016, 11:25 AM
#52
6 years change pdk oil - do this! Although the oil you will get will still look new, do this. Gear oil is 12 years. However, I think for the 991, which I think should also apply for the 997.2 both lubricants have a service life of 12 years.
04-17-2016, 09:27 PM
#53
2009 and some early 2010s were advised to change the pan. Later, the threads on the drain plug were not compromised. Oil should be clean, the cost should be less than $500, the peace of mind for doing the service ... priceless.
04-18-2016, 03:56 AM
#54
what i'm asking - when this pan is replaced, do the oil from the gearbox/cogs compartments drains out and needs to be replaced to?
or this pan serves just the clutches section of the box?
or this pan serves just the clutches section of the box?
04-18-2016, 10:30 AM
#55
Full pan replacement or drain plug does the same. Clutch and gearbox (tranny) are shared. The diff is separate.
04-18-2016, 11:30 AM
#56
no - clutch+dif is one compartment, gearbox/cogs are another one.
04-21-2016, 10:27 AM
#57
Rennlist Member
Thread Starter
However the PDK clutch fluid serves three purposes and just draining it out of the drain hole is not sufficient to fully change it. The fluid lubricates the multi-plate clutch surfaces but is also a coolant for them. The clutch fluid pump runs faster when the PDK is being used more aggressively and runs at full speed when launch control is activated. Additionally it is used as a hydraulic fluid to activate a number of solenoids within the transmission.
A PIWIS is necessary to place the PDK into the proper mode to allow all of the fluid in the coolant pump lines and the solenoid control lines to be flushed out of the PDK during a drain/flush/fill operation. Simply draining the fluid from the drain hole or via pan removal is not sufficient. This is not a DIY operation unless you have a PIWIS and have the detailed instructions for the change procedure.
04-21-2016, 02:48 PM
#58
Three Wheelin'
The other answers are correct but I want to make sure you understand this fully. The PDK clutch fluid is indeed separate from the fluid for the gears in the transmission. So no worries about the transmission gear fluid until 100,000 miles. The PDK clutch pan is separate.
However the PDK clutch fluid serves three purposes and just draining it out of the drain hole is not sufficient to fully change it. The fluid lubricates the multi-plate clutch surfaces but is also a coolant for them. The clutch fluid pump runs faster when the PDK is being used more aggressively and runs at full speed when launch control is activated. Additionally it is used as a hydraulic fluid to activate a number of solenoids within the transmission.
A PIWIS is necessary to place the PDK into the proper mode to allow all of the fluid in the coolant pump lines and the solenoid control lines to be flushed out of the PDK during a drain/flush/fill operation. Simply draining the fluid from the drain hole or via pan removal is not sufficient. This is not a DIY operation unless you have a PIWIS and have the detailed instructions for the change procedure.
However the PDK clutch fluid serves three purposes and just draining it out of the drain hole is not sufficient to fully change it. The fluid lubricates the multi-plate clutch surfaces but is also a coolant for them. The clutch fluid pump runs faster when the PDK is being used more aggressively and runs at full speed when launch control is activated. Additionally it is used as a hydraulic fluid to activate a number of solenoids within the transmission.
A PIWIS is necessary to place the PDK into the proper mode to allow all of the fluid in the coolant pump lines and the solenoid control lines to be flushed out of the PDK during a drain/flush/fill operation. Simply draining the fluid from the drain hole or via pan removal is not sufficient. This is not a DIY operation unless you have a PIWIS and have the detailed instructions for the change procedure.
Great explanation.
How much fluid do you think is left in the pump and lines?
If you attempt to DIY, would this be similar to a Brake Fluid change or Oil Change where some of the old fluid is still left in?
04-21-2016, 04:21 PM
#59
Don't know about storm's procedure but mine was just drained form the drain hole overnight. Pre filled and that was the only time piwis came into the picture, measured the temperature of the clutch oil with engine running. Pdk went into oil fill mode commended by the piwis, at the right temp, and oil was filled until it overflowed throu the fill hole. That's it.
04-21-2016, 04:23 PM
#60
Thank you for the correction. As I now view the diagrams in my head, I had a rectile-cranial inversion on that post!!!! In the post 60 years old world, I now question my memory rather than my knowledge. Fortunately you were willing to correct me. I’ve been a bit embarrassed to issue thanks. That’s on me. So here it is ... Thanks.