lbowroom
Plaid, white on black, CF, 8/27/21, Track Pack
I misspoke, what I meant is people don’t know what symptom their talking about and lump them all together and call it the vibration from 2012
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Jebinc’s Plaid Vibration Experiment Results!!!
- Thread starter jebinc
- Start date
WilliamG
Hinge Fanatic
Yep, and that’s dead wrong. The refresh 2021 S and onward does not have the same vibration issue of pre-2021 cars.
Hotboy408
Member
i Flipped my rear axles left to right, both same part # confirm fix the vibrate when acceleration!
This is the first I've heard of having rear axles vibrate during hard acceleration. It's always been the front axles before.
Hotboy408
Member
really ? most people can't differentiate front or rear vibration anyways. but sure keep believe its the front then.
n2mb_racing
Active Member
Tesla replaced my front half shafts and the vibration went away. Also, in track mode with rear torque bias the vibration goes away.
Propofoln
Member
WilliamG
Hinge Fanatic
We know it's the front for sure. Track mode rear bias tells us that, when it's gone!
I believe be the vibration this head is about is in the front end, not rear.
Half shaft half @$$! Just having fun, but if the shoe fits…
Wow, all the typos...
s/b "I believe the vibration this thread is about is in the front end, not the rear"....
you are on to something, my 2021 mslr had vibration under hard accel,..installed lowering links adjusted to lower front to low with car set to medium, and rear set to high with car in medium. Done mostly for better tire wear ( better camber) Had car realigned for best toe, camber slightly negative for handling,...love the car now very little vibration on maximum acceleration. JCFirst, please refer to the thread below for detail information about this affliction, as that will not be discussed in this thread.
"Refreshed" Model S model VIBRATION tracking and information thread!!!
This thread aims to capture sub model (dual and trim motor) vibration occurrences for "refreshed" Model S cars. Please comment with as much information you can, should your car have this affliction (including VIN range). Issue Description: Vibration felt in accelerator pedal and sometime in...teslamotorsclub.com
Second, I’m not recommending any action on your part or any products, nor am I making any pronouncements, representations or providing a definitive conclusion – Just sharing my experience; yours may be different (or it may not)…
tl;dr - As you may recall, I recently installed new 19” Signature SV104’s wheels (all stock sizes and offsets), new “road force balanced” Pirelli PZero To Elect tires (stock), Titanium lugs, and N2itive RXS-2 Plaid adjustable lowering links and my vibrating Plaid is nearly vibration free, after three days of testing!!!
Note: My Plaid is/was the poster child for vibration in the yoke, pedal, floor and console.
The Details
Prior to the first drive, using the adjustable lowering links (purchased for this experiment as a Tesla provided solution doesn’t appear on the horizon any time soon), I dropped the car a tad more than ½” all around and detailed it for good luck and karma….
After a day of driving, I noticed no vibration and decided to really look to replicate it, post mod. Ambient outdoor testing temperatures over the past three days of testing as ranged from 38 – 43 degrees, so my new summer tires were fairly “hard”.
Yesterday (Day 2), I drove it several times trying to get it to vibrate on the low setting (1/2” drop from stock low setting) and on a few occasions (only in the mid 40’s MPH range) I thought I heard/felt the slightest vibration – so I raised the suspension to medium (which results in a height slightly lower than stock low) and was able to feel it slightly more on occasions – but still way way less than prior to all of these changes.
I used to get the vibration at various speeds, including highway speeds. So far, not even a slight vibration at highway speeds. Note: Most of my testing was not on the highway, so more testing needed.
My current thinking (subject to change with more testing):
1. Some claim not to have the vibration and others do. I’m thinking those who may launched their cars numerous times on settings other than low, might have done more damage to the half shafts/CV joints than those that always launched on low and/or with Cheetah stance enabled. In Cheetah mode, the front really drops down, reducing half shaft-CV joint angles…
2. Something is not right/damaged on my car, so it might not be possible at this point to eliminate the slightest vibration 100%, 100% of the time.
A Mechanical Engineering Perspective (See my attached diagram/aid):
I think the following are facts:
1. Basic front DU placement/design is vintage ~2013 – a front DU was added to the Model S later, whereas in the subsequent models (3/Y) a front DU was “designed in” from the start…
2. Model S front half shafts are different lengths (Asymmetric design), due to DU not being “centered” and high
3. The shorter shaft (Left/Driver’s side, I think) angles are sharper than the right, resulting in more stress and binding at the CV joints and the other front shaft.
4. Lowering the car reduces these angles, and results in reduced CV joint and shaft stress.
What we don’t know is if lowing the car “X” amount will prevent or permanently eliminate this issue. Ideally, Tesla would redesign the front DU mount to it is lower, more like the rear DU placement, resulting in less binding and damage from hard acceleration.
So, what might Tesla do if this is real, save for not redesign the front chassis and DU placement?
1. Via firmware update, change the air suspension heights so the car is lower
2. Limit power, if suspension setting is anything other than Low
3. Limit dead stop launch power if not in Cheetah mode
This story is not finished, more to come!!!
Next Steps: I plan to drop the front of the car to .7” (Setting 5 on the links) and retest in the coming days. Will then return it to stock height upon conclusion of the experiement.
Your thoughts?
View attachment 772110
@WilliamG @EndlessPlaid @lbowroom @N2itive @SignatureSales @GroovaEV @uthatcher
They'll probably just reduce power in both drive units which will obviously cripple your acceleration.
I'd log total power before during a 0-60 run and compare post update.
n2mb_racing
Active Member
Yes, they seem to have pushed a fix in 2023.44.x
It shifts power to the rear wheels and seems to reduce the vibration for some people.
WilliamG
Hinge Fanatic
There’s no power reduction. Just a shuffling of power under low/moderate acceleration. Full throttle is still full power to all motors.
Took the vibrating mid 2021 Plaid out for the first time since 44.30.7 installation yesterday.... It was about a 15 mile round trip. For the most part, no real vibration in the typical zone of 38-48 (low or med height), but there is still a muted vibration (mostly at med height) in the mid to upper 50's. Once above 62, there is no vibration. Would love for others to test for vibration in the 50's at low and med height settings. Not sure if the improvements stem from randomness, or if 44.30.7 had a fix for those left out, previously. Perhaps some of the older COVID build cars had different inverters or suppliers. Who knows....
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