It's quite a bit more than the noise, but the shaking gets so onerous before the shafts are near the point of actual failure that I don't think it's a safety concern yet. Then again, while I can't imagine someone reasonably making the decision to drive the car at that point, the world is great at making better idiots when you make something idiot-proof.
Very interesting; there must be multiple issues with them. Mine have been replaced twice, and it's about time for a third. Last time the joints were noticeably worn compared to the new ones. You could feel the play by hand.
Give it a few months and then tell us if it is still a big improvement. Mine is at the Van Nuys service center now seeing what they can do about the shudder. We'll see what gets replaced when I get it back.
Sounds like your Signature Loaner got a pane-free, "Over-The-Air" update.
So incredibly good. Thanks for the smile in this relatively somber thread.
From my experience the new parts have corrected the balance issue. Jack Shaft was also updated.
Either the wear makes the half shafts degrade into the harmonic frequency, or the harmonic vibrations are initially muted by some kind of fitment that eventually wears down. That's assuming it's truly a harmonic problem.
FWIW the part numbers are identical for the times they have been replaced on mine. Same numbers as @wallstguy and @veyronish Last time in late March. Great for a couple thousand miles, then back to shaking. It's getting really bad on mine again, even resuming cruise control accelerates hard enough to shake.
