PDK reliability on the track
09-30-2018, 04:45 PM
#34
Rennlist Member
The PDK failed in my wife's Cayman R. We bought it with 26k miles on it as a CPO vehicle. After about 3k of track miles, the PDK completely failed while coming off the track in the paddock.
Porsche replaced the entire transmission under CPO warrantee after a number of attempts to fix it.
Porsche replaced the entire transmission under CPO warrantee after a number of attempts to fix it.
09-30-2018, 05:15 PM
#35
Rennlist Member
I have a 2015 C2S No problems so far. I run 10 track days a year and usually it's high 80's low 90's. I would certainly like to change the fluid. Can someone please give some pointers. I would rather not use my CPO if I don't have to.
10-01-2018, 02:17 AM
#36
Rennlist Member
31,000 miles more then half track. No problem.
I haven’t heard or seen GT cars with PDKS problems.
I think the non GT cars just don’t have enough gearbox cooling (Or engine, or brake cooling).
But also plenty of 991 Non GT cars do fine in the Florida heat..
I haven’t heard or seen GT cars with PDKS problems.
I think the non GT cars just don’t have enough gearbox cooling (Or engine, or brake cooling).
But also plenty of 991 Non GT cars do fine in the Florida heat..
10-01-2018, 05:18 PM
#39
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A few minutes of interweb searching indicate replacement rebuilt/exchange PDKs are available from some well know Porsche dealerships for around $8.5k. These would likely come with the typical warranty on parts, but not sure if dealer installation would be required to obtain that parts warranty.
Interesting posts here also about battery and coil pack issues. I know from personal experience that flakey coil packs can cause bizarre PDK and/or PSM and/or ECU error messages and faults displayed, along with weird drivability, all of which go away with a battery disconnect-reconnect. The data on the CAN bus must be partially corrupted when some items hanging on the bus start to flake out.
Interesting posts here also about battery and coil pack issues. I know from personal experience that flakey coil packs can cause bizarre PDK and/or PSM and/or ECU error messages and faults displayed, along with weird drivability, all of which go away with a battery disconnect-reconnect. The data on the CAN bus must be partially corrupted when some items hanging on the bus start to flake out.
10-01-2018, 05:25 PM
#40
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The pumps are all driven by gears driven by the input shaft or output shafts, but maybe PIWIS can be used to open/close some passages for oil flow within the transmission to get more out than you can get out by doing a PDK pan drop. You can get 3 qts out by pulling the pan plug. I think I saw posts here on RL where a little more comes out by dropping the pan from what gets trapped in the pan when the plug is pulled due to the pan's shape. I don't think there is any way to get all 5.7 qts of clutch-side fluid out unless you use PIWIS, but not sure. The gear-side can drain 2.4 qts by pulling the two drain plugs. I have other posts on RL about clutch-side UOA results, and soon to come gear-side UOA results comparing used to new fluid/oil and corresponding mileage and track use.
10-01-2018, 11:39 PM
#42
Burning Brakes
10-02-2018, 10:27 AM
#43
Nordschleife Master
I have just returned from Rennsport where I heard of a first, and a second... Two different people, talking about two different cars, told me about 991 GT3 PDK cars they were struggling with that keep going into limp mode. YMMV.
10-02-2018, 06:57 PM
#44
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With the 991 GT3, limp mode can be caused by things unrelated to the transmission, such as low fuel.