Fred2

New owner question

The new car I test drove did not creep when at an idle, but the 2009 car I purchased does.

What I am trying to describe is that one car felt like it had a centrifugal clutch, and you had to give it gas to get it to move.
My car feel like it has a torque converter, and it will pull itself along in 1st gear.

Is one or the other right or wrong?

Mike in CA

This is from the 2009 technical info on PDK:

Crawling
To ensure that the PDK transmission behaves in the same way as a Tiptronic transmissionwhen driving off, clutch 1 is already slightly engaged so that the transmission becomes positively engaged and must be held by the brake. Another advantage ofthis measure is that the vehicle drives off very comfortably and generally smoothlywhen only a light load is applied. Driving off at a higher load results in higher driveoffpower.

Stationary decoupling
When the vehicle comes to a stop, the clutch is generally opened as long as the
brake is applied. However, the clutch remains slightly engaged in order to take full advantage of crawling. The reason for this measure is reduced fuel consumption.

The PDK in the new 991 has had some hardware and software changes. Maybe the crawling feature has been changed or eliminated.

fgv1it

My wife drives a 2012 car with a PDK (a Boxster), and it creeps at idle, just like a normal automatic transmission. Have not driven a 991 or 981 yet, so i don't know if that behavior has been changed for the new cars.

Fred2

If it helps, the non creeping car was a 2011 GTS.

Mike in CA

I don't know if they made any changes to PDK for the 2011 model. I would generally say that that it's designed to creep as per the info above. If the car you drove wasn't doing that I don't have an explanation.

Leader

My '11 GTS creeps at idle. Has from Day 1.

sixtosune

My '12 (last production run) 997.2 S creeps (crawls) at idle.

Yet anothercrisis

As does my 12 997S

TheDatanator

So I have a question about something I've been concerned with since taking delivery of my 981CS in June ...

... Given the fact that PDK - by design - has a creep feature and the technical writings indicate clutch 1 is engaged much of the time even when stopped, is there any concern regarding premature wear of these wet clutches?

I tried searching but nothing really came up - then again I'm using the mobile client so...

What is the expected life of these clutches Equal or similar to clutch life on a car with MT?

My flame suit is on btw... I realize Porsche engineers are talented enough to account for this constant slippage at stop but I can't seem to find anything to give me a good comparison to the only thing I know: manual clutches.

... Flame on brothers!

Dartmouth

I just bought a 2009 C4S pdk and find it to be inconsistent herky jerky in 1st. I have tried three different driving methods, straight automatic, automatic with Sport engaged (normal shocks) and manual clutch. I am having a very rough time with the personality of my 4S taking off in 1st gear. I just can't get comfortable with the take off from start. The hesitation, the hard hit I I feel sometimes and a consistent accel point on my gas feeding on the accelerator. In Sport mode it is different as well in take off and also downshifts from second to first. Will I ever be become one with my PDK? A frustrated previous manual shift C4 owner.

Fred R. C4S

Your experience may be limited to DRY clutches. The PDK uses wet clutches which can handle the small amount of energy required to slip the clutch under the very light load of idle speed creep.

kouzman

My 09 does the same. I guess it is normal.

91469972

I don't believe I have ever taken my foot off brake peddle at a light in my entire life.

rodsky

I thought the only PDK that didn't creep was the 991 GT3.Aside from that they all do. I'm not 100% but think that's the case.

Mumbles

Of course you have....or you'd still be there