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Need help figuring out vibration

I am trying to figure out if the vibration I have in my 2021 Plaid is the typical shudder or something else. My 9/2021 delivered Plaid drove fine until it developed a vibration after a skidding incident on the highway at 3k miles in 4/2022. I was acceleration along a slight curve and the car lost traction for a bit and it almost slid in to the median barrier. At the same time it skid, I heard a sound and vibration that felt like a tire coming of the wheel in the front. I had 20" signature wheels with All weather pilots that were 2 months old.

I pulled over and the wheels looked fine, and driving was fine as well. I couldn't figure out what happened. The next few days after this incident I started noticing a vibration through the accelerator, floor of the car in the front, and through the yoke. There was a certain audible quality as well since I had non-foam tires.

I noticed it happening under acceleration only at any speed from 39+ mph, and it would disappear in track mode with power going to the rear wheels only. I had the wheels balanced twice to make sure this was not related to the wheels. They found one wheel lost balancing for some reason and didn't notice any damage to it.

I changed the wheels back to my 21" arachnids, and had them balanced. The vibration got slightly better, and less audible, but the vibration was still there.

I took it to Tesla in May and they kept the car for three weeks and gave it back to me stating they didn't notice anything, but they did tighten up the "bolts." I assume this was something on the shafts.

For the first week it vibrated less but got worse as I drove the car during Summer 22 with the 21" arachnids. I noticed the vibration got worse in hot weather, and when going uphill. It also only happens under acceleration, light or hard. During 90 deg days it felt almost like there was an axle hitting the floor of the car when accelerating hard. It felt like something was going to break. Once my 8 year old daughter was with me in the car and I had to accelerate hard, and she said she even felt the vibration through the floor in the rear passenger area.

Using track mode to send power only to the rear motors did not mitigate the vibration anymore. Now it vibrates consistently at 39mph+ when the car has been warmed up for at least 7-10minutes of travel.

I took the car in October and it started getting colder so the intensity of the vibration lessened. I let the SA drive the car home and keep it for a day and he comes back and tells me he figured it out. I was excited.

He says it is you lane departing avoidance causing it. I was just so frustrated but I played along. They just wasted my time.

I picked up the car and found the car damaged in a hit and run in the Tesla service center parking lot which was like throwing salt on my wounds. It was a major waste of time trying to figure out the plate of the person from the crappy 720P cameras.

Well when I took it home I unsurprisingly discovered that it was not the lane departure avoidance. The vibration is still there. As it got in to 50F the vibration is less, but now the car makes clunking noises when I turn the wheels all the way and reverse or go forward in any direction at slow speeds. Also the car's tires feel wobbly when on the highway at high speeds like it is getting pushed around.

Oh and the vibration is still there even in cold weather at any speed from 39mph, though less noticeable compared to the summer hot weather. Sometimes it is only noticeable since I know how butter smooth it felt before this all began.

I am at a loss and don't know whether this is the shudder that everyone talks about in the Plaids or if it is something else. Any help would be greatly appreciated.
 
My Plaid does this at approximately about 42mph. It's minor to me and doesn't seem to be causing problems or getting worse. Oddly enough when it's warm out, it seems less noticeable or lighter

If it's causing damage, I'll be upset. If it isn't, I can live with it.
 
My Plaid does this at approximately about 42mph. It's minor to me and doesn't seem to be causing problems or getting worse. Oddly enough when it's warm out, it seems less noticeable or lighter

If it's causing damage, I'll be upset. If it isn't, I can live with it.
It’s interesting it does seem to vary with weather. But mainly the initial start up vibration. The 42-50 vibration with very light throttle applications seems independent of it
 
Constant 48-54 mph-ish under steady slow acceleration. It’s not bad enough to be annoying. It’s just there. New half shafts fixed it for 1,500 miles or so, then it returned. It’s not bad enough to get rid of the car. The bouncy suspension and the yoke are way worse than the vibration.
 
Constant 48-54 mph-ish under steady slow acceleration. It’s not bad enough to be annoying. It’s just there. New half shafts fixed it for 1,500 miles or so, then it returned. It’s not bad enough to get rid of the car. The bouncy suspension and the yoke are way worse than the vibration.
I fully agree that the vibration isn’t a deal breaker.

As someone who had a 1k hp ICE vehicle, I’m well aware of all the compromises that come along with that. That’s essentially all gone with the plaid. Stupidly quick daily driver you can throw anyone into the driver seat and not have any issue. Plaid is revolutionary.
 

Doanster1

Active Member
Feb 14, 2018
1,307
705
Oregon
You should check sway bar end links etc yourself. You said things were fine until a “skidding incident” so it doesn’t sound like something inherent like responses above. Your daughter being able to feel it from the back seat means it’s def not normal.
 
Anyone else notice vibration at higher speeds in the Plaid?

I get a constant vibration/shake in steering wheel, seats, and footwell when driving 55-85mph. Peak intensity 65-70 mph. Can be seen in left mirror. Can be heard; sounds like wind buffeting if leaving window open. Vibrates regardless of accelerating, maintaining speed, or decelerating. Increases in frequency in relation to speed. Wheels rebalanced but issue persists.

Inspected all the wheels and they look fine.

Swapped wheels from side-to-side, but vibration still centered around front left of vehicle.
 
Did your wheels come with friction locks? Wondering if the tire shifted on the rim slightly under the crazy torque? My signature wheels did, and it says so on the invoice.
165E1F11-540F-4EBE-B0E2-41C95B0E9DC1.jpeg
 
You should check sway bar end links etc yourself. You said things were fine until a “skidding incident” so it doesn’t sound like something inherent like responses above. Your daughter being able to feel it from the back seat means it’s def not normal.
I took it to Tesla in May 2022 and they said they torqued up the suspension a bit. It did make a difference for a couple of months but then returned.
 
Anyone else notice vibration at higher speeds in the Plaid?

I get a constant vibration/shake in steering wheel, seats, and footwell when driving 55-85mph. Peak intensity 65-70 mph. Can be seen in left mirror. Can be heard; sounds like wind buffeting if leaving window open. Vibrates regardless of accelerating, maintaining speed, or decelerating. Increases in frequency in relation to speed. Wheels rebalanced but issue persists.

Inspected all the wheels and they look fine.

Swapped wheels from side-to-side, but vibration still centered around front left of vehicle.
Sounds a little similar to my issue. I rebalanced and changed my wheels as well, without resolution of issue. I am waiting for warm weather to return before I take it back. Sometimes I wonder if it is just better to get a 2023 model and sell this car.
 

MFrunkerOG

Active Member
May 30, 2015
1,092
3,561
Atlanta, GA
Just a thought - I got another set of 20” wheels and found some Pirelli elect tires in my size. Was vibrating a bit and also feeling a bit squirrely.

My tire shop is ridiculously fastidious so when I took it back to get them to check it, the first thing they did was to test for roundness and sure enough it was off for both fronts. They shaved the fronts just a tad to get them perfectly round .

What a world of difference that made! Zero vibration and so much better in feel.

The tire shop owner told me that he has rarely seen perfectly round tires from the likes of Michelin / Pirelli these past few years.

Now that may not solve your issue, so if a tire roundness/shaving doesn’t fix it for you, take your car to an independent experienced shop and get them to look at all the suspension bushings - those are mostly rubber oem and I wouldn’t be surprised if those have a compromised bushing (due to your incident) causing all this. If it’s worse in one season that points to a rubber part somewhere.

Also, I cannot stress enough how great the MPP suspension links are - they have completely eliminated all the rubber bushings on my car and other than the obvious adjustability of camber and toe all round, the precision of the steering and connectedness to the road is there now. My Plaid felt like a barge before. Now it’s crazy precise in handling.
 
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