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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Jebinc’s Plaid Vibration Experiment Results!!!
- Thread starter jebinc
- Start date
WilliamG
Hinge Fanatic
Prototype..? I’ll believe there’s a new half shaft design when I see it. Part numbers, please, when available!
n2mb_racing
Active Member
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.
He asked about how I was feeling about the Lemon law process. I said I would prefer my car to be fixed, but if we can't fix it, I would try another new one. I wasn't interested in just getting my money back and moving to another car manufacturer.
I figure doing a buyback and getting a new Plaid would be a sufficiently large pain in the ass that I'm willing to try to get mine fixed. Mostly because I assume I'll lose my 1.24% loan, and I'll have to get them to fix all the new car defects all over again... But hey, I'd get the new better headlights and taillights, steam, round wheel, and tilting screen!
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.
MarcG
Active Member
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)
n2mb_racing
Active Member
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?
trayloader
Member
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.
trayloader
Member
WilliamG
Hinge Fanatic
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.
n2mb_racing
Active Member
MarcG
Active Member
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?
WilliamG
Hinge Fanatic
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.
trayloader
Member
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.
A rougher tarmac, summer, and a warm axle means complete silence.
IMHO 80% of the „worn halfshafts“ we witness here is a nothinburger. Plus tesla has a grease problem. Especially on the left side where the hot air from charging gets trapped and further liquifies the grease.
lbowroom
Plaid, white on black, CF, 8/27/21, Track Pack
I gave up (on Tesla to fix). The lowering links help, but don’t eliminate the vibration.
I don’t think so, either. Why? Because you can 100% turn the vibration in track mode (rear bias on full).
My vibration is about 80% improved in track mode. Have we made Tesla aware of the fact Track Mode improves vibrational issues?
It’s kinda silly to have this problem plague 1000s of Teslas for years and have it be improved dramatically in a mode that is limited for track use.
Tesla should be working on an update to make whatever is helping to reduce the vibration apart of normal drive modes. This thread should be brought to Tesla’s attention.
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