n2mb_racing
Active Member
My service advisor called yesterday to follow up on the vibration. He said there's a new half shaft prototype design. He's going to order them for my car and schedule a service when they come in. Fingers crossed!
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Prototype..? I’ll believe there’s a new half shaft design when I see it. Part numbers, please, when available!My service advisor called yesterday to follow up on the vibration. He said there's a new half shaft prototype design. He's going to order them for my car and schedule a service when they come in. Fingers crossed!
I know, right? I hope not just trying to run out the clock on the Lemon law. Though, I just checked and it's 2 years or 24,000 miles in NC.Prototype..? I’ll believe there’s a new half shaft design when I see it. Part numbers, please, when available!
Yep, trash of a reply; but not at all unexpected.I just picked my car up from service for the console and suspension creaking. I mentioned the half shaft vibrations and here's the invoice reply:
"Test drove vehicle to duplicate issue. Under all test conditions, some small amount of axle chatter was heard, though during testing and hard checks while in repair, no hardware failing was found. At this time, after having replaced the axles twice for this concern, no further replacement of axle half-shafts will be performed so long as the driving characteristics match what was found while in service. It can be expected that in certain conditions, in the chassis of the Plaid Model S with 1000+ HP can have some noise emanating from the axles without warranting continuous replacement."
Seems like a ridiculous response, since my 700 HP 2016 model S didn't have this vibration, but suddenly going to 1000 HP would add a new vibration under light load? But, whatever. I'll go back to lowering the car and move on.
Fake news offered to placate the angry customer....Prototype..? I’ll believe there’s a new half shaft design when I see it. Part numbers, please, when available!
Come on, it's not the half shafts. How would you explain away that they magically "fix" themselves when in Track Mode, full rear bias? The front DU is still very much active.My service advisor called yesterday to follow up on the vibration. He said there's a new half shaft prototype design. He's going to order them for my car and schedule a service when they come in. Fingers crossed!
I think the vibration goes away in Track Mode with full rear bias because:Come on, it's not the half shafts. How would you explain away that they magically "fix" themselves when in Track Mode, full rear bias? The front DU is still very much active.
I don't know. I think it might be still the half shafts. Why would the vibration go away when we lower the car or replace the half shafts?Come on, it's not the half shafts. How would you explain away that they magically "fix" themselves when in Track Mode, full rear bias? The front DU is still very much active.
Cold Grease is a valid option.I think the issue might be play in inner joints, perhaps rollers too small? I had 2 new axles and both have play on them.
FYI that’s not true about 1.). It absolutely does vibrate under harder acceleration. It’s just that you get through the really trouble mph much more quickly. It’s easiest to feel the vibration under the lightest of light acceleration.I think the vibration goes away in Track Mode with full rear bias because:
1. When not in Track Mode, the vibration happens under light acceleration, not hard acceleration
2. When in Track Mode with full rear bias, light acceleration does not activate the front DU - this can be confirmed by CAN bus readings on front DU power (tesLAX shows 0W for me in those conditions)
I'm tempted to try this ...Cold Grease is a valid option.
We have a guy here who injected via a syringe as much axle lube as possible and the shudder was gone. Guess the gravity has and effect, plus cold lube.
Oh interesting, I haven’t felt it under hard accel. Have you tried to accelerate hard with Track Mode/full rear bias on to see if you still feel it?FYI that’s not true about 1.). It absolutely does vibrate under harder acceleration. It’s just that you get through the really trouble mph much more quickly. It’s easiest to feel the vibration under the lightest of light acceleration.
Yes, and I do not. You feel the general resonance through the drivetrain much more not in track mode. Now I haven’t completely gunned it since I’m very nervous to not end up in a tree, but even heavier acceleration you can definitely feel the difference.Oh interesting, I haven’t felt it under hard accel. Have you tried to accelerate hard with Track Mode/full rear bias on to see if you still feel it?
The hard acceleration shudder is the electronics getting on the edge of the wheel spin and then correcting each wheel individually. I do have a 2017 performance with 21“ for now 120k KM drive like a bat and still have the first drivetrains. Even the slightest uphill or cold start provoked this behavior. Plus the anti slip kicking in stakkato like evoking a worn halfshaft. A machine gun.Oh interesting, I haven’t felt it under hard accel. Have you tried to accelerate hard with Track Mode/full rear bias on to see if you still feel it?
I don’t think there is any half shaft wearSo everyone gave up? Do you think having the halfshafts replaced then immediately lowering the car is a good solution?
I haven’t bothered to take mine in for service, it seems like a waste of time until you resolve the issue causing premature halfshaft wear.
I gave up (on Tesla to fix). The lowering links help, but don’t eliminate the vibration.So everyone gave up? Do you think having the halfshafts replaced then immediately lowering the car is a good solution?
I haven’t bothered to take mine in for service, it seems like a waste of time until you resolve the issue causing premature halfshaft wear.
I don’t think so, either. Why? Because you can 100% turn the vibration in track mode (rear bias on full).I don’t think there is any half shaft wear
I don’t think so, either. Why? Because you can 100% turn the vibration in track mode (rear bias on full).