I responded previously to your post and said "check for software update". However, since that post, I had the 60k service done on my car. The @#$@$ dealer did not perform two additional items that are specific to the 60k service interval.

1. Change PDK (transmission) fluid
2. Change PDCC reservoir

The PDCC reservoir is irrelevant to your (and my) problem with jerky shifting, but the transmission fluid is not. I am posting this so that you and others are aware that the above two items are scheduled maintenance, but the dealer can (and mine did) overlook them because they are not part of the standard every 10k, every 20k, etc schedule.

I just now had PDK fluid changed (at 69k miles) and reflashed transmission software. My shifting is not perfect, but is MUCH improved.

 

Can you find out the software version they flashed too?

 

The jerkiness in my transmission has returned. I had it in recently for oil and coolant leaks (oh joy!) and told them about the jerky 2nd gear behavior. They said:

1. We updated the transmission software
2. We do not know whether you had the latest or not because our computer doesn't tell us that - it just puts down the new version regardless


I don't know whether either of those two statements are true, but 2nd gear still does not behave the way I EXPECT a transmission (at any price) to behave.

This is the one issue that keeps me from loving my PTT unconditionally.

 

I remember reading a review, I think of the new Panamera, and they talked about the con of the older versions was that the PDK was jerky.

 

The only time it gets annoying to me is if I'm starting with heavy throttle from a stop or if accerating up a hill from a stop. What works for me is manually shifting into first then after moving push the lever to the right to get auto mode, almost immediately. Also, using very light throttle until the clutch hooks up works too,
The PDK is a wonderful transmission but I found adjusting to its characteristic makes it more enjoyable.

 

My PTT has only 40k miles on it and i was having the same jerkiness with it, took it to the dealership last week and had the transmission serviced and asked for the update! Been told that there’s a new update and had it updated! (Service + update), + PDCC full service and brake flush and other 20k 40k services which are not related to this topic! Had the car back and first ride off the road felt the huge difference! Perfect shifting timings and smooth acceleration! Couldn’t be happier!! The next day took the car for another test and transmission was smooth and ride was super pleasant!

Yesterday drove the car again and street raced twice on sport plus with a Nissan GTR and was impressed by the results! But as soon as I’ve switched over to normal mode all the jerkiness and weird shifting was back again!

i have no idea what happened or going on but these PDKs are so complicated! I’ve never seen something like this! I believe thats what they call adaptation! Or relearning driving style! As soon as i pushed the car and drove it sporty it has gotten back to his jerky mode!

so i believe this is just the way these transmissions are, as i said car is almost brand new with only 40k on it and have been told everything is operating perfectly!

so I’ve found the pedal shifting the best way possible of reducing jerkiness but even with that it’s still there and you can experience it!

long story short software update or service would not resolve the issue but it will prevent it from the mechanical failures!

good luck everyone and enjoy your Porsche!

 

Hey guys, just wanted to inform you all that Ive had plenty of great experience with fixinig this issue on a few panameras, these usually can become apparent after 50k miles depending on the climate that you live and the type of driving that you do... If you switch over to Motul Multi-DCTF transmission fluid, the jerkiness completely smooths out and the transmission just runs much much happier with that fluid in. It is Porsche approved by the way. Just thought Id share that with you guys as this is precisely the reason why I go with this stuff.

 

Also, when you drive going from Sport+, and switching back down to regular eco mode, a lot of the jerkiness is due to the delay in the drive by wire for the throttle. if you start off by driving in eco mode first, the jerkiness isnt there i noticed.

 

Porsche recommends to only use the Pentosin FFL-3 in all PDK transmission but i strongly believe that Pentosin isn’t a superior fluid and thats why PDKs are having problems after 30k to 50k miles depending on the driving style!!

I’m 99% with you because in one of my Porsches i was having jerking and shutter problems and it all went away after adding a transmission fluid additive to it! So it was all fluid quality related!!!!!!

 

Just a quick FYI, the Motul Multi-DCTF fluid is Porsche A40 approved.

 

most of the PDK issues are fluid related and it can be fixed with an additive! I’ve never tried Motul but i believe it can be effective!

 

I would first try a PDK reset (instructions on forum), then a fluid change - this was the best for mine. But this PDK is no where near the same as the 911 one.

 

both were done by dealership! No changes! It’s all fluid quality and friction related!

 

Did anyone ever get a clear fix for this? I have same issue with jerkiness...sometimes I hear engine reving but transmission not catching and when it finally does it jolts me. When this happens should I manually shift to 1st gear to smooth it out?

Also I noticed turning off psm has helped with the jerkiness

 

I've learned to live with it and get around it. If I take my foot off the brake and wait half a second, there is no delay. To me, it feels like the clutch engaging.