CPO issues, what to do?
02-05-2023, 02:09 PM
#106
On yet another trip to the dealership (replaced rear spoiler—warranty), this time I took a road test with the shop foreman and he confirmed the 57mph vibration. He along with the service manager said that this is an inherent problem with the Panamera and that despite replacing multiple parts on numerous Panameras in effort to solve the problem, they have no remedy.
I contacted PCNA and they stated that the vibration is a “harmonic characteristic” of the Panamera and “Germany” considers it “normal”. Since the vehicle is "performing normally" there is no service issue—case closed.
I guess we can all stop chasing our tails. There is no solution.
I contacted PCNA and they stated that the vibration is a “harmonic characteristic” of the Panamera and “Germany” considers it “normal”. Since the vehicle is "performing normally" there is no service issue—case closed.
I guess we can all stop chasing our tails. There is no solution.
02-05-2023, 02:21 PM
#107
"A harmonic characteristic". Wow!
Customer support from the German manufacturers is, sadly, the worst in the industry. Your $125k plus car vibrates, they will tell you that it is normal and represents superior German engineering.
Customer support from the German manufacturers is, sadly, the worst in the industry. Your $125k plus car vibrates, they will tell you that it is normal and represents superior German engineering.
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chassis (02-05-2023)
02-05-2023, 03:14 PM
#108
Rennlist Member
That's not what I'm talking about. I'm talking about the frequency's ability to increase again at 91 miles an hour and then reduce as you go passed that. In other words, much like you have less shimmy at 62 than you do at 52, I have that as well but then around 90 mph the same thing happens again and then happens less above that.
02-05-2023, 04:06 PM
#109
Basic Sponsor
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So it's time to change the crank shaft! 😂😂😂
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chassis (02-05-2023)
02-05-2023, 04:21 PM
#111
Burning Brakes
So to take a step back, has anyone taken a AWD 971..1 or .2 on a lift, removed all four wheels, and increased the car's driveline through this speed in a specific PDK gear (6th) ?
Can this even be done, without setting off a bunch of alarms. I would say the PTMS traction management has to be disabled, but what else ?
Still vibs ?
Then disconnect the prop shaft to the rear axle and repeat.
Still vibs ?
Remove both front half shafts.
Still vibs ?
Can this even be done, without setting off a bunch of alarms. I would say the PTMS traction management has to be disabled, but what else ?
Still vibs ?
Then disconnect the prop shaft to the rear axle and repeat.
Still vibs ?
Remove both front half shafts.
Still vibs ?
02-05-2023, 04:32 PM
#112
Time to cancel the 2023 4S order?
No Technician but doing some research:
Driveline Harmonics & Drive Shaft Vibrations Explained | Quadratec
No Technician but doing some research:
Driveline Harmonics & Drive Shaft Vibrations Explained | Quadratec
Last edited by Panuny; 02-05-2023 at 04:40 PM.
02-05-2023, 04:57 PM
#113
You would think the engineers could figure out how to dampen it.
02-05-2023, 05:16 PM
#114
Rennlist Member
On yet another trip to the dealership (replaced rear spoiler—warranty), this time I took a road test with the shop foreman and he confirmed the 57mph vibration. He along with the service manager said that this is an inherent problem with the Panamera and that despite replacing multiple parts on numerous Panameras in effort to solve the problem, they have no remedy.
I contacted PCNA and they stated that the vibration is a “harmonic characteristic” of the Panamera and “Germany” considers it “normal”. Since the vehicle is "performing normally" there is no service issue—case closed.
I guess we can all stop chasing our tails. There is no solution.
I contacted PCNA and they stated that the vibration is a “harmonic characteristic” of the Panamera and “Germany” considers it “normal”. Since the vehicle is "performing normally" there is no service issue—case closed.
I guess we can all stop chasing our tails. There is no solution.
rhetorical question.
02-05-2023, 05:22 PM
#115
Rennlist Member
I don't think the case is closed, because you still report vibration. The dealer could have replaced the propshaft because they know how to beat the (warranty hours) book on this job and therefore make some coin on the project.
02-05-2023, 05:27 PM
#116
Rennlist Member
Back to exhaust hangers, there is a video of a guy who replaced the ZF8HP fluid on an RS5, and the exhaust mount/transmission mount/transmission crossmember were clearly visible.
It could be there is too much going in in too small of a package space, with too little rubber. The vibration sources of exhaust and driveline are mounted via (possibly too small?) rubber isolators and attached to the transmission crossmember, which is attached to the body. The distance to the body (underfloor) from the rubber exhaust and transmission mounts is very small. It could be a case of simply not enough isolation.
An idea is to try a V8 transmission mount and exhaust mount, if they fit. The heavier V8 powertrain would likely have a more substantial transmission mount, not sure about the exhaust mount.
Thoughts?
It could be there is too much going in in too small of a package space, with too little rubber. The vibration sources of exhaust and driveline are mounted via (possibly too small?) rubber isolators and attached to the transmission crossmember, which is attached to the body. The distance to the body (underfloor) from the rubber exhaust and transmission mounts is very small. It could be a case of simply not enough isolation.
An idea is to try a V8 transmission mount and exhaust mount, if they fit. The heavier V8 powertrain would likely have a more substantial transmission mount, not sure about the exhaust mount.
Thoughts?
02-05-2023, 05:29 PM
#117
Rennlist Member
Per Chassis earlier post , I’m now a believer in the center longitudinal torque coupling. Many other cars have the 4.0 and PDK from WAG and not the same harmonic vibration.
but, can this part be replaced or is it replaced w the PDK. If with the PDK, Now a 30k repair.
people have placed car on lift and replicated vibration, BGB placed car on dyno w front drive disabled and replicated problem. Therefore, not likely suspension, not a specific gear like the Cayenne, not CV joint or other rotating items.
exhaust mount or other mounts would be more road surface conditions vs speed as these parts aren’t connected to speed.
In my drive today I touched 90 but did not feel any extra vibration like at 56mph.
but, can this part be replaced or is it replaced w the PDK. If with the PDK, Now a 30k repair.
people have placed car on lift and replicated vibration, BGB placed car on dyno w front drive disabled and replicated problem. Therefore, not likely suspension, not a specific gear like the Cayenne, not CV joint or other rotating items.
exhaust mount or other mounts would be more road surface conditions vs speed as these parts aren’t connected to speed.
In my drive today I touched 90 but did not feel any extra vibration like at 56mph.
Last edited by Norge911; 02-05-2023 at 05:32 PM.
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chassis (02-05-2023)
02-05-2023, 09:58 PM
#119
Rennlist Member
Per Chassis earlier post , I’m now a believer in the center longitudinal torque coupling. Many other cars have the 4.0 and PDK from WAG and not the same harmonic vibration.
but, can this part be replaced or is it replaced w the PDK. If with the PDK, Now a 30k repair.
people have placed car on lift and replicated vibration, BGB placed car on dyno w front drive disabled and replicated problem. Therefore, not likely suspension, not a specific gear like the Cayenne, not CV joint or other rotating items.
exhaust mount or other mounts would be more road surface conditions vs speed as these parts aren’t connected to speed.
In my drive today I touched 90 but did not feel any extra vibration like at 56mph.
but, can this part be replaced or is it replaced w the PDK. If with the PDK, Now a 30k repair.
people have placed car on lift and replicated vibration, BGB placed car on dyno w front drive disabled and replicated problem. Therefore, not likely suspension, not a specific gear like the Cayenne, not CV joint or other rotating items.
exhaust mount or other mounts would be more road surface conditions vs speed as these parts aren’t connected to speed.
In my drive today I touched 90 but did not feel any extra vibration like at 56mph.
Porsche uses the "map controlled multi-plate clutch" terminology with both Panamera and Cayenne. The coupling seems like it would be replaceable on Panamera if it has its own oil volume, separate from the PDK.
02-05-2023, 11:27 PM
#120
Burning Brakes
Time to cancel the 2023 4S order?
No Technician but doing some research:
Driveline Harmonics & Drive Shaft Vibrations Explained | Quadratec
No Technician but doing some research:
Driveline Harmonics & Drive Shaft Vibrations Explained | Quadratec
Last edited by Ericson38; 02-05-2023 at 11:31 PM.