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Slipping transmission

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Old Apr 1, 2020 | 05:46 PM
  #1  
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Default Slipping transmission

I just recently took delivery of my 2020 Panamera 4s that was on order, picked it up and the next day sales shut down due to the virus. I have noticed that when I come to a stop such as at a stop sign and immediately take off, my transmission seems to slip. The RPM's will jump up to 1700 - 2400 and then the car will move forward. This only happens when I stop and then immediately go. I have not taken it in yet due to the virus and it is hard to get the car to do it every time. Has anyone heard of an issue like this? My 911 nor my old Macan Turbo ever exhibited this type of behavior. This will happen both with the auto start stop engaged and disengaged.

Thank you,
Phil
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Old Apr 1, 2020 | 07:56 PM
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Are you in Comfort or Sport mode? Our car is a bit older but in Comfort mode it starts out in 2nd. Try Sport mode and see if it acts differently.
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Old Apr 1, 2020 | 08:18 PM
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971 Panameras start out in 1st regardless of drive mode. I had a similar problem with my 2018 4S; it was as if the transmission was caught off guard by a sudden call for power and the clutch wouldn’t engage. Meanwhile, the revs would climb. I found it less likely to happen in sport and sport + but still there. I also experienced some clutch slip when accelerating fast through the gears on the highway, such as merging briskly (blasting) into traffic. I did the so-called transmission reset posted elsewhere on the forum and it helped a little. Ultimately I took it in for the 10k service and complained about it. The dealer had the car for 3 weeks - they fussed with it, agreed there was a problem, consulted with Porsche NA, did some fiddling with it, then returned the car to me saying to bring it back if I have any more problems. “Code” for “we couldn’t entirely fix it, but we’re hoping the problem goes away.” The transmission has been better since but I have less confidence in the car. I plan to bring it up again when I bring the car back in for the 20k. Since I’ve had improvement, I’d suggest you bring it to the dealer as these transmissions are complex.
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Old Apr 1, 2020 | 09:53 PM
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Thanks Beer Brewer, you describe exactly what it is doing. Do you remember the process to do a transmission reset? I would like to try this before taking it in.

MC-pgts, as Beer Brewee stated, this starts out in 1st no matter in comfort or sport, i played around a bit and it did seem better in sport mode but I want it to work correctly in all modes.
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Old Apr 1, 2020 | 10:31 PM
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Beer Brewer, I found the reset but it did not have any effect, guess I get to go to the dealer. Did get a great video of it slipping though
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Old Apr 2, 2020 | 07:25 AM
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Good morning sir: I think that’s a good idea. Hopefully there will be a fault stored in the TCU that’ll help them figure out what’s going on with your car. The dealer DID make my car better, but again, they had to admit they couldn’t make it perfect. The 8-speed in the 971 feels very different than the 7-speed I had in my Macan Turbo. Between the two I prefer the 7-speed, which behaved perfectly over 65k miles.
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Old Apr 3, 2020 | 02:28 PM
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My 2018 4S was hesitant off the line and sluggish in town driving. I did the PDK reset but didn't notice a difference. Once my car was past the ~2,500 mile break-in period, some harder driving solved the problem. My first full throttle pass in the desert had the PDK searching for the next gear, shifting up , then back down, then back up. The second pass was a single shift up, but not at the optimum point. The third was solid and the subsequent in town driving was transformed. The car now has little slip off the line, RPMs stay higher, the PDK downshifts more quickly when called upon in normal town driving. It's like a different car. My car has sport chrono, and the same calibration was done for sport mode as well but the change wasn't as dramatic and frankly might have been the result of the normal mode calibration that had already been done. I was shocked at the difference, and how aggressive a 4S can be.
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