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Just to revive an old thread, I had the same shudder issue when accelerating. They ultimately replaced the following items which eliminated the shudder - for now anyway. Service notes pasted below.
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Concern: Vehicle has noise or vibration while driving (customer couldn't determine location)
Customer states: When accelerating there is heavy vibration and shutter coming from front right right of vehicle.
Pay Type: Warranty
Corrections: Interior NVH General Diagnosis
Performed road test during service visit and found vehicle experiencing torque steer and wheel shudder. Due to the amount of torque vehicle produces will will experience shudder and torque steer, front tires will make screeching noise as tires are trying not to lose traction. Upon road test did verify steering clicking noise. Next step is to lift vehicle and retorque front suspension and retest for system operation
Corrections: Suspension - Front - Check Torque
Torqued front suspension to specification. Road test vehicle.
Corrections: Halfshaft Assembly - Front - RH
Removed and replaced halfshaft assembly.
Part Quantity
FRONT RIGHT HALFSHAFT - DUAL MOTOR (1030616-00-B)
Parts Replaced or Added
Corrections: Jackshaft Assembly - Front
Removed and replaced jackshaft assembly.
Shop foreman test drove vehicle prior to installation of new parts. Following installation of the front right halfshaft assembly and the installation of the front jackshaft assembly, shop foreman test drove and verified that vehicle is now operating to the specifications of like models. No further work recommended at this time.
Part Quantity
JACKSHAFT ASSY, FR (1030632-00-A) 1
Parts Replaced or Added
Just hit 35K miles and the vibration is back in full force just as bad as it was right before it was fixed at 24K. My suspicion is that WAY many more PDL cars have this folks realize.
I guess I should have mentioned that replacing the half shafts again fixed the problem again. I hope it stays fixed this time
Sorry to bring up a dying thread, but because of this thread my 85D is in service and they are replacing both front shafts. I will report the part # when it happens.
Thanks for putting this on my radar @sorka , hopefully the new part resolves it. I'm at 35k mi and I don't want to pay for this down the road if it's caused by a poorly designed part.
Has your vibration returned now that you have the suspected stronger half shafts that come on the P100D ?
Got the car back today. As I suspected, it was the right hand side CV joint. They replaced the half shaft on that side. After confirming it the fix, they decided to also replace the left hand side as well. Not sure if it's because they still detected some vibration or not. They said it was "for good measure".
Finally smooth and vibration free. In fact, I guess the problem has been there for quite some time because it's far smoother than I remember even when it wasn't bad enough for me to call it a problem.
So my vibration has returned full strength and it did so after a specific incident. Did a full power acceleration on a right turn with the suspension on max which resulted in a violent shake.
After that normal straight line acceleration on "normal" or "low" produce a modest vibration.
I'm fairly certain that the CV joints when put under tremendous torque while at an angle caused the joints to stretch and loosen.
I think they should limit torque (i.e. power at low speed when during sharp turn or when on the highest two suspension settings.