jvecchi

I have been experiencing an upshift issue with my 992 GT3. I generally always operate the car in Sport mode and the PDK in manual mode. Occasionally when I upshift from first to second the transmission does not upshift on the first command - I have to give it a second, and sometimes a third, command to get the transmission to shift. The problem is the same whether I use the gear lever or the paddle. It only occurs after the car is warmed up and moving out from a dead stop. There doesn't seem to be any correlation between vehicle speed, RPM, or throttle position, and it only happens occasionally - maybe once or twice on a 100 mile drive. There are no error messages or error lights when this happens. The car has 6k miles.

The car has been looked at by the dealer. They checked and did not find any error codes stored. They are at a bit of a loss to explain or diagnose the problem.

Has anyone out there experienced anything like this? Any thoughts?

raymort

Sounds like both the PDK and MT transmissions have some defects.

992.Turbo.S

There is an entire thread in the 992 Turbo S forum on this ongoing issue.

https://rennlist.com/forums/992-turb...hift-fail.html

JB991

Weird, mine happens 4th to 5th and 5th to 6th. Sometimes, on a cold start, my reverse won't engage. Dealership chalks it up to being a GT3. No fix action and isn't always easy to duplicate.
This is all street driving, so not sure how it'll go on a track day, and not really excited to go out and try it to see the end result.

This happens on occasion and only when "punching it", so the frequency is not one to gauge to be able to show the tech back at the dealership.

Peruna

What are the MT defects? Mine has been pretty great so far (1800 miles).

AtTheGlen

There are several of us who have posted on the above thread. I have sent Porsche Customer Service and Porsche Customer Relations numerous quotes from members (without names/handles) who have had similar 1-2 shift failures. I have about 2,500 miles on my Turbo S and I use the paddles about 99.5% of the time. I am seeing missed upshifts in both "Normal" and "Sport" modes. Others report missed 1-2 upshifts only on curves, only when warm/cold, etc. One post (#28 in the above thread) includes a "recipe" that the owner used to increase the likelihood of recreating a missed shift with his service advisor. On this thread, you will see various service managers' reported explanations for the 1-2 fail, and these typically receive a very poor reception on the thread.

There are 169 posts on the above thread indicating that the problem is real. Not only am I trying not to over-rev the engine when cold, but also it is embarrassing when the person in a 20-year-old beater next to me thinks that I'm drag racing. About a year ago, I was surprised that a 992 GT3 owner posted that about a missed 7-speed PDK 1-2 shift. I had been thinking that in changing the 7-speed PDK to the 8-speed used in non-GT3 cars that I and others have, Porsche might have run into problems mechanically or with software programming. Or maybe they made some emissions-related modifications that are causing the issue. I never had an issue with a 1-2 shift in manual mode on my 991.2 GT3.

Early next week, I plan to reach out to Porsche Customer Service again and I will ask to speak with a senior manager. I received one call in response. I asked if this representative had spoken with technical staff in Atlanta or, if necessary, Germany. He said he did and that a service bulletin had been published. My service advisor has not seen it, and when I wrote back to the rep and asked for the bulletin number, I never received a response.

My last email to Porsche was on June 12, and I will follow-up early next week with a phone call. I wonder if Porsche is aware of the root cause of the issue (design, software, emissions commitment) and knows that implementing a fix would be very costly.

For anyone reading this thread and having 1-2 shift issues with the GT3 7-speed PDK, please share details about your experience and I will add that anonymously to my current list of owners' 1-2 shift fails. Thank you and I'll report back on this thread with any updates.

mkfaraj

blew my MT at 1200 miles

ipse dixit

Tell us more.

sparetireless

Same https://rennlist.com/forums/992-gt3-...pdk-issue.html

porsche.earth

Could anyone guide me on extracting the raw log data for errors from a 992?

I'm concerned that there's a possibility the tools intended for scanning for errors have been tampered with to withhold certain outputs. My intention is to start collecting raw log data before my next service visit. Typically, when my car experiences issues, the dealer scans it, clears the codes (thus, possibly erasing evidence) and assures me everything is functioning correctly while doing very little else.

Any help in this matter would be greatly appreciated.

jvecchi

Thank you for all of the feedback.

I put 144 miles on my GT3 yesterday. I tried a bit of a different procedure for shifting gears. Rather than just giving the paddle a quick flick, I held it in until the shift was complete (which only takes less than a second). I did the same thing when I use the gear lever to shift. I experienced no issues when using this procedure. Has anyone tried this?