PP13

Hello Gents,

I am trying to better understand the dual clutch system in my 2013 991.1 , I have PDK and I wanted to know if it's true that when if you drive in auto mode the clutch would wear out faster vs.manual shifting. I know when I ma driving in auto by the time I hot 50 miles the gear is already in the 6th gear, where in manual mode I have more control on the shifting where I wouldn't be exercising the clutch as much. I like driving the car with both options I was just curious how much of a wear do you see in auto mode over time.


Thank you

shammerman

Never ever heard anyone express any concern about this. The PDK is pretty much bullet proof (with a very, very few exceptions) and does not require much anything other than the basic service that has very very long service intervals (first one for 991.1 at 120K miles or 10 years if I recall correctly) . While not a mechanical expert to any extent, that just sounds a complete non issue.

snake eyes

I think the powertrain would wear out around the same time as the PDK.... I mean they throw this transmission in everything from Panamera's to their SUV's
This isnt a Ferrari F1 transmission

PP13

Thank you gents. for the inputs, I guess my understanding was since it's a dual Trans. it has two clutches? or is it designed as one? which was my initial concern about the clutch wear. I be honest with you I like to drive it in manual mode and I tend to down shift often which definitely contributes to the clutch wear.


Cheers

snake eyes

Its a wet clutch, not a dry clutch transmission...wear is minimal.

chuckbdc

Watch this for a good explanation of how PDK's dual clutches work.

https://www.autoweek.com/news/techno...week-explains/

PP13

Good morning

Thank you Chuckbdc, and other's for sharing the information. I have a better understanding now. Since we are on the topic of PDK, as I had mentioned in the beginning of the tread my 991.1 is a 2013 with 20k miles, I know the service recommendation is 120k or 10 years, well I am in the 10th year now. Has anyone had a PDK service done? what is a typical service cost? Can a Porsche Indy specialist do the service or it has be done by the stealer-ship?

Cheers
FM

Izzy911

At least I thought on the 997.2, I thought I saw a oil flush for PDK clutch as part of 60k service. But I also read to wait at 120k service???

Laszlo_Laz

It’s kinda of a life-time tranny unless it blows up. So preserving one way or another is mute. I’d simply enjoy and not overthink it.

drdantheman1

Has been discussed a lot on this forum. If it's been 10 years, go ahead and have it changed. I had mine done at the dealer for peace of mind (and I do NOT take my car to the dealer for anything), around $800. Some indy shops are capable of doing it, but PDK is expensive and I'm not about to take that risk.

PV997

The PDK has two chambers, the clutch/hydraulic chamber (hydraulic fluid) and the gear chamber (gear oil). On the 997.2 the clutch fluid was 60k but Porsche changed it to 120k service for the 991.1. There's really no good reason for this as there's minimal difference between the two, presumably Porsche just determined the original interval was too conservative. Gear oil is 120k on both the 997.2 and 991.1.

It's not really a flush as the clutch fluid is simply drained and refilled, only about 60% of the fluid is actually replaced as large amounts are trapped in areas that don't drain. I DIY'ed mine at 60k/10 years (997.2) and the drained fluid looked brand new. I'm sure I could have left it another 60k miles and it would have made no difference.

Multiple examples of people getting screwed over the by dealership as they charge ridiculous prices for the fluid (up to $60/liter, more than 2x the online cost) and charge for a dry fill (5+ liters) instead of what was actually drained.

Izzy911

Great info and well explained, thanks!

RP4S911

I'm pretty certain that the only point where the PDK could get more "wear" than not in any way is if it's in stop&go traffic it's entire life. They say it's better for the car to give it more room in traffic to let 1st gear engage fully when moving up. Either way, as odd as it is, the very very few PDK issues have been random and usually by people that baby it either way. Nevertheless it's bulletproof and statistically less issues than any and all transmissions on the market, even with the usual Porsche track day abuse that most other cars never see. It's been the only 3rd pedal-less car i've ever owned that I enjoy this much.

NCheok

This needs to be better qualified, what is stop & go traffic?

Rather, the better answer is, don't coast = Letting the car roll without using the throttle.

If the car needs to move, use the throttle and feather accordingly.

Letting it coast is not ideal nor recommended.

RP4S911

Stop&Go as in having the car constantly slipping the clutches before engaging first. Like you stated, help it get into first instead of letting it constantly slip. However, this is nitpicking because the PDK is engineered to do all this without problems, but it's the only real wear point I can think of.