Rough down shift
Burning Brakes
Joined: Dec 2018
Posts: 1,043
Likes: 357
Many people in the TPMS thread seem to point to the 2-1 shift in Sport Mode being the issue. But, I'm noticing the lurching/roughness in the 3-2 shift in non-Sport, too, as most of you here have mentioned.
Icemang, the survey is a good start. I'd also consider calling PCNA.
I'm this close to purchasing a Cayenne but will hold off specifically because of this issue, esp now that I've driven one around town for a few days.
Icemang, the survey is a good start. I'd also consider calling PCNA.
I'm this close to purchasing a Cayenne but will hold off specifically because of this issue, esp now that I've driven one around town for a few days.
BTW - and this is a little off topic but what the heck - I discovered a trick to eliminate the annoying shove-in-your-back when the engine turns on with AS/S engaged when you take your foot off the brake. When the car is stopped and the engine is off due to AS/S, the trick is to paddle-shift the car into 2nd so the car starts up again in 2nd rather than 1st. Because it's in 2nd, the shove-in-your-back from the engine starting isn't felt anymore. It's become second-nature now for me to do this, but it only works when the car is on level ground. If the car's on even the slightest incline, it will not shift manually into 2nd gear when stopped. The "geniuses" who designed the car must've figured the engine wouldn't be able to get the car moving again in 2nd gear if it's on an incline, so they lock that out when it is with the car stopped. Totally ridiculous, but there it is.
Last edited by LSR; Apr 23, 2021 at 03:57 PM.
Racer
Joined: Aug 2019
Posts: 267
Likes: 48
From: Austin, TX
That other thread talks about the transmission lurching being fixed but it isn’t. The campaign has nothing to do with transmission software; its stated by Porsche to correct the TPMS software. I’ve had the campaign done to my base Cayenne and it did zip for the transmission. For whatever reason the folks in the other thread report their cars don’t lunge anymore, that’s great. I wish I knew what changed with their cars so I could replicate it with mine. It's a good assumption that if the campaign discussed in the other thread addressed the transmission, Porsche would say so and my car would also be fixed, but it’s not. Transmission downshift lunging is still a serious problem. So much so, that I’m not getting another Cayenne if this isn’t corrected by the time I’m shopping again in about a year.
Last edited by Pushinit; Apr 23, 2021 at 04:38 PM.
Burning Brakes
Joined: Dec 2018
Posts: 1,043
Likes: 357
This is very interesting. This tells me that Porsche did something in addition when they did the RDK update. I had the update and am one of the ones who has enjoyed the fixed downshift in Sport mode. For giggles I just took it out for a errand and decided to test that exact thing 5 different times. It rolls to a stop in Sport mode a smooth as silk. Nothing like it would do before.
Instructor
Joined: Jul 2019
Posts: 219
Likes: 148
One of the things I've been most impressed with in my Turbo Coupe is how smooth the transmission is and how fast it shifts. My previous 2016 GTS had a rougher transmission. My wife has a Lexus and the Cayenne shifts as smooth as the Lexus and 100x faster.
Burning Brakes
Joined: Jul 2019
Posts: 1,040
Likes: 417
The short answer is experienced Porsche dealers have a fix to this issue, and lots of us don't have this issue any more.
It was fixed on our 2019 Cayenne S. I suffered from it for 22,000 miles until my last wkk2 service update, where I complained about it and said they would fix it. ( of course dealers always says to everybody that they never heard about it or heard of any other problem)
I thought the fix was part of the wkk2 rdk update, but as I learned from experience, Porsche fixes don't necessarily show on the invoices, and the wkk2 update does not sound involved in this issue that I understand.
This issue has been discussed a lot in our forum..
https://rennlist.com/forums/cayenne-...e-fixed-2.html
It was fixed on our 2019 Cayenne S. I suffered from it for 22,000 miles until my last wkk2 service update, where I complained about it and said they would fix it. ( of course dealers always says to everybody that they never heard about it or heard of any other problem)
I thought the fix was part of the wkk2 rdk update, but as I learned from experience, Porsche fixes don't necessarily show on the invoices, and the wkk2 update does not sound involved in this issue that I understand.
This issue has been discussed a lot in our forum..
https://rennlist.com/forums/cayenne-...e-fixed-2.html
Rennlist Member
Joined: Dec 2017
Posts: 51
Likes: 10
From: Folsom CA
I just posted about the 3rd to 2nd downshift in my 2019 Cayenne S, though my issue may be a little different from that discussed here. It is not so much that my car lurches forward in the downshift (especially using the paddles in sport mode), but that the rev matching seems a little off, whereas in each of the other downshifts it is very smooth. Also a software issue?
Rennlist Member
Joined: Aug 2006
Posts: 634
Likes: 251
From: Southcoast MA
If it's not affecting the way the car acts (or "feels") as you come to a stop it's a different issue, so it would be hard to say what the cause might be.
Last edited by icemang; May 14, 2021 at 01:01 AM.
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Rennlist Member
Joined: Aug 2006
Posts: 634
Likes: 251
From: Southcoast MA
Originally Posted by austincarowner
Filed a complaint with NHTSA
I would encourage all of you experience the lurging / lurching issue to file a complaint with the NHTSA ([url
Filed a complaint with NHTSA
I would encourage all of you experience the lurging / lurching issue to file a complaint with the NHTSA ([url
https://www-odi.nhtsa.dot.gov/VehicleComplaint/). This problem that they refuse to acknowledge is even a problem, let alone fix in North America, is a safety issue to pedestrians as well as drivers in non-ideal driving conditions. Unfortunately the threat of government mandated recalls and costly legal burden put on Porsche is likely the only way we'll get them to take any accountability for this car defect.
The NHTSA form takes <5 minutes to complete. When asked "What part of your vehicle was affected", I selected "Brakes" and "Power Train". Again, you can file a complaint easily here -> https://www-odi.nhtsa.dot.gov/VehicleComplaint/
The NHTSA form takes <5 minutes to complete. When asked "What part of your vehicle was affected", I selected "Brakes" and "Power Train". Again, you can file a complaint easily here -> https://www-odi.nhtsa.dot.gov/VehicleComplaint/
I'd encourage people to follow this advice posted in the "Lurging" thread. I just did. I'm convinced it's the same issue.
Last edited by icemang; Apr 29, 2021 at 04:40 PM.
3rd Gear
Joined: May 2021
Posts: 3
Likes: 0
From: Vancouver, BC
A loaner 2020 Cayenne brought me here... I have my Taycan 4S in for an update and the dealer gave me what they had available.
I've been driving this around for about a day and noticed weird behaviour causing very jerky (abrupt) acceleration and braking with this car.
As many have described, this "lurching" occurs during braking and happens right around when the vehicle in about to come to a complete stop. It feels like the car lunges forward and an adjustment in brake force is suddenly needed. I believe it is related to Auto S/S because it's disappears when I've manually turned it off or driving in Sport Mode which disables AS/S. Seeing as this is the latest M/Y, the problem still exists sadly.
The other issue I find is when the car is in a Auto Stop mode, that accelerating is also abrupt causing a sudden push forward which isn't smooth at all.
Is this common with Cayennes only or has anyone heard this is just an issue with Porsche's Auto S/S technology that is experienced in all their automatic cars?
I've been driving this around for about a day and noticed weird behaviour causing very jerky (abrupt) acceleration and braking with this car.
As many have described, this "lurching" occurs during braking and happens right around when the vehicle in about to come to a complete stop. It feels like the car lunges forward and an adjustment in brake force is suddenly needed. I believe it is related to Auto S/S because it's disappears when I've manually turned it off or driving in Sport Mode which disables AS/S. Seeing as this is the latest M/Y, the problem still exists sadly.
The other issue I find is when the car is in a Auto Stop mode, that accelerating is also abrupt causing a sudden push forward which isn't smooth at all.
Is this common with Cayennes only or has anyone heard this is just an issue with Porsche's Auto S/S technology that is experienced in all their automatic cars?
Burning Brakes
Joined: Dec 2018
Posts: 1,043
Likes: 357
Sadly, yes - these are common, model-wide problems. I’m not buying another Cayenne until the refreshed model (mine is a 2019) hits the showroom and then only if it does not have the transmission and AS/S issues the current models have.
Last edited by LSR; May 13, 2021 at 09:34 PM.
Burning Brakes
Joined: Jul 2019
Posts: 1,040
Likes: 417
Contact Porsche of Houston North, I know they fixed mine. Maybe, they can talk to your dealer about how they fixed it.
I learned by experience that dealers don't post certain fixes on their receipts that may not require new parts.
Burning Brakes
Joined: Dec 2018
Posts: 1,043
Likes: 357
Again, many of us that suffered from that problem since 2019 and for 20,000 miles, had the lurching issue fixed.
Contact Porsche of Houston North, I know they fixed mine. Maybe, they can talk to your dealer about how they fixed it.
I learned by experience that dealers don't post certain fixes on their receipts that may not require new parts.
Contact Porsche of Houston North, I know they fixed mine. Maybe, they can talk to your dealer about how they fixed it.
I learned by experience that dealers don't post certain fixes on their receipts that may not require new parts.
Racer
Joined: Oct 2015
Posts: 391
Likes: 28
Again, many of us that suffered from that problem since 2019 and for 20,000 miles, had the lurching issue fixed.
Contact Porsche of Houston North, I know they fixed mine. Maybe, they can talk to your dealer about how they fixed it.
I learned by experience that dealers don't post certain fixes on their receipts that may not require new parts.
Contact Porsche of Houston North, I know they fixed mine. Maybe, they can talk to your dealer about how they fixed it.
I learned by experience that dealers don't post certain fixes on their receipts that may not require new parts.
This is encouraging news. Can you give me the name of your SA or the shop manager with whom you dealt and would know about this? I’m ready to call them tomorrow, but don’t want to be told “it’s normal.” My dealership has that phrase on auto-repeat. If you prefer, you can message me with the info. I’d be enormously grateful.
I decided to ditch the idea of getting a Cayenne after returning it (see above; it was a loaner). I drove a 2021 Escalade a few minutes after stepping out of the Cayenne, and the smoothness of the transmission was night and day. Almost unreal.
Porsche: If you're paying attention, your Cayennes deserve much, much, much more attention.
Rennlist Member
Joined: Aug 2006
Posts: 634
Likes: 251
From: Southcoast MA
Well one way to get their attention is the new owner survey. I replied that I was "very unhappy" and "would not recommend" in the survey and got a call the next day, the first of several. I only heard from the dealer (who I praised in the survey, I only criticized the car), but it was the General Manager who called me first. I actually directed his attention to this thread and the "Lurging" thread. After that I heard from the head service guy and the head of sales. They all promised to do something about it.
Unfortunately I'm 500 miles away for care on a medical thing that has popped up since I ordered the car and won't be back in my home state for another 3-4 weeks so I can't report what happened when I took it in yet but I will report back when I have something to report.
Unfortunately I'm 500 miles away for care on a medical thing that has popped up since I ordered the car and won't be back in my home state for another 3-4 weeks so I can't report what happened when I took it in yet but I will report back when I have something to report.