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My theories are;
1) bad position sensor or speed sensor which makes air suspension engage disengage at just above 56 mph. But info in this thread, low probability
2) the front axle going from front diff, through engine block to front wheel. More likely. CV joint due to angle or bearing.
3) wheel bearings
I spoke with a friend today and he used to have an Audi allroad. His car had a harmonic vibration too. It was caused by the angle through front CV joint as car could raise up and down Was fine for 10_15k miles, The started to vibrate. All Allroads had same problem. So is this the case for the Panamera, ie theory 2 ?
Just an update, the rims were swapped from a 2022. Im still testing it but the intense vibration I was having is for the most part gone. I still have a little here and there especially at night when its cold and that has to be attributed to the size and nature of having 21 inch rims. Will keep this updated.
Hey - new to the forum and new to Porsche. Have very similar vibration issues. Was hoping the vibrating was because the 4S with Pirelli A/S had been sitting a while and maybe that it had flat spots. After 400 miles though, the intermittent vibration is still there.Ugh.
Unfortunately it might just be a characteristic of this car. The drivetrain is pretty complex, there’s also no rubber disc (guibo) on the driveshaft like most cars to cut down on vibrations. The 2022 I drove rode much softer than mine but had the vibration in the low 60s. The rims helped my car substantially but it’s still there in some conditions though minor.
The vibration seems worse when the cold--driving after sitting for a few hours/overnight (not weather conditions).
I don't think the drive shaft from the transmission to the front differential is the cause of the vibration since its rotational speed does not match the rotational speed of the wheels (1st order vibration). But who knows!
The best analogy I can make is that it feels like driving a car that has sat too long and has flat-spotted tires. There is a definite vertical up-and-down component to the oscillation. It usually improves some while driving, but rarely goes away completely. I know it's not a tire issue since I have tested with 4 different sets of tires and wheels. Also there is no vibration or shaking in the steering wheel with is usually the case with flat-spotting. Besides, tires do not develop flat spots after sitting for 2-3 hours.
Sounds to me like a tire is out of round. ESP since it got much better changing the wheels/tires out. Also, as I mentioned above, tires flat spot when they sit, esp in cold weather. Some brands more than others. It can take a long time to get them to smooth out too, if the ambient temps are cold. If you find a place that car “road force balance” your tires……and many places can….they will see that it’s out of round. I would think you dealer would have done this, but you ever know. Good luck.
Sounds to me like a tire is out of round. ESP since it got much better changing the wheels/tires out. Also, as I mentioned above, tires flat spot when they sit, esp in cold weather. Some brands more than others. It can take a long time to get them to smooth out too, if the ambient temps are cold. If you find a place that car “road force balance” your tires……and many places can….they will see that it’s out of round. I would think you dealer would have done this, but you ever know. Good luck.
No, been through all that--car has seen 4 different sets of tires/rims. Porsche even put on a brand new set of 20" tire & wheels to test--no joy. (see my earlier posts)
No, been through all that--car has seen 4 different sets of tires/rims. Porsche even put on a brand new set of 20" tire & wheels to test--no joy. (see my earlier posts)
Apologies. My recollection from the thread was that changing them to the newer wheels fixed most of the issue? Well good luck!
I spoke to my friend about this and his neighbor has a RS6. Same engine, different transmission, same AWD system. Some RS6 have rear axle steer, some don’t.
I described the Panamera behavior to him and he test drove his neighbors RS6, no vibration on that RS6 around 57-62mph
This thread is interesting. 9Y0 Cayenne with V6 engines, base 3.0L and S 2.9L TT, have vibration at 60mph in 6th gear. No complaints yet for 4.0L V8 TT GTS or Turbo models. @rrd1288 's Turbo is the first V8 complaint I have seen. The Panamera has the PDK so in my opinion we can rule out the PDK and 8HP.
I have been reading the Audi sites and they don't seem to report a vibration. To me this points to the wet multiplate torque coupling - specifically clutch plate judder.
No smoking gun yet but my guess it is downstream of the transmission: power takeoff unit, center wet multiplate torque coupling or rear propshaft. The PTO and torque coupling are relatively new tech and made by Magna.
Some Audi vehicles use a Torsen coupling behind the PTO, Porsches use the wet multiplate coupling. Some Audis use the multiplate coupling.
The three configurations for center torque distribution used by Audi and Porsche are:
- "crown-wheel differential" - traditional bevel gear diff with clutch plates
- "self-locking differential" - Torsen center differential
- Quattro ultra - wet multiplate clutch used on Q5, Panamera and Cayenne. Probably other vehicles as well.
The 8HP ZF is widely used by VAG, as well as the geared power takeoff unit that feeds torque to the center differential or coupling, which then sends it to the front and rear propshafts.
Right. And it uses the wet multiplate center torque coupling, correct? The point is to understand whether the Audi "quattro Ultra", 971 Panamera and 9Y0 Cayenne vibration are coming from the same component. What do you think?
Porsche calls it a "hang-on" PTM concept. Audi uses the "quattro Ultra" label. It's a wet plate coupling manufactured by Magna.
12-15-2022, 10:08 PM
