Freudianly
Banned
May I ask what car do you currently own/drive?
I do not drive a car. I cannot stand the noise. I will buy one when I am absolutely sure it is silent in the long run, and with at least the autonomy of a Model S.
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May I ask what car do you currently own/drive?
Does anyone have experience with what happens eventually if the milling noise occurs and then is never fixed? Does the gearbox eventually overheat and fail, or what?
I do not drive a car. I cannot stand the noise. I will buy one when I am absolutely sure it is silent in the long run, and with at least the autonomy of a Model S.
The milling noise affects base DUs as well.
No sir. This is clearly a mechanical sound. This is reinforced by the fact that Tesla sometimes refers to it as "bearing noise." It has a distinctly different sound from any of the electrical noises I've heard.I believe it is an electrical sound, not a mechanical sound.
No sir. This is clearly a mechanical sound. This is reinforced by the fact that Tesla sometimes refers to it as "bearing noise." It has a distinctly different sound from any of the electrical noises I've heard.
No sir. This is clearly a mechanical sound. This is reinforced by the fact that Tesla sometimes refers to it as "bearing noise." It has a distinctly different sound from any of the electrical noises I've heard.
No sir. This is clearly a mechanical sound. This is reinforced by the fact that Tesla sometimes refers to it as "bearing noise." It has a distinctly different sound from any of the electrical noises I've heard.
The "milling sound" is caused by a bearing that gets worn and goes bad. It does sound electrical though , like phone interference. Some describe it as cicadas. It's not a grinding sound. I don't know what "mechanical" would sound like. I'd describe the "clunk" issue more like a mechanical one.
Simple. A worn bearing develops slop. A sloppy bearing causes a variance between two gears, for instance. The distance between those two gears must be tightly controlled to remain quiet. The sloppy bearing allows the clearance between the gears to move away from optimum, and a noise results.so how is a bearing dependent 100% on Kw power draw? there are 2 types of 'milling'
I think the bearing issue is the Elon fixed w/ a shim one and the other is?? replace DU and hope it doesn't happen again too soon
Simple. A worn bearing develops slop. A sloppy bearing causes a variance between two gears, for instance. The distance between those two gears must be tightly controlled to remain quiet. The sloppy bearing allows the clearance between the gears to move away from optimum, and a noise results.
As an example: When motor power is applied, the sloppy bearing allows the two gears' mesh to change unfavorably. Gears tend to want to distance themselves under power. If the bearing is allowing relative movement because it's worn, the gear mesh may part slightly, only under power. Gears like these need to be very carefully aligned to wear properly and remain silent. When motor power isn't being applied, the worn bearing allows the gears to mesh back together to proper alignment, and the noise goes away.Yeah, but why on a drivetrain with no clutch or torque converter that is solidly connected does it only occur when under power? On smooth, flat roads, I can turn it on and off like a switch with the accelerator pedal as I coast along. I do not get it all all under any level of re-generation. Wouldn't a mechanical noise be present whenever the whole mechanism is spinning?
As an example: When motor power is applied, the sloppy bearing allows the two gears' mesh to change unfavorably. Gears tend to want to distance themselves under power. If the bearing is allowing relative movement because it's worn, the gear mesh may part slightly, only under power. Gears like these need to be very carefully aligned to wear properly and remain silent. When motor power isn't being applied, the worn bearing allows the gears to mesh back together to proper alignment, and the noise goes away.
Another example. These gears are spiral cut (like all modern transmission gears, because it's quieter.) Thrust bearings are required because the gears want to move axially under power. If it's a faulty thrust bearing, it will make noise when put under the stress of the pressure applied to it when the gears are under power from the motor.
Yeah, but why on a drivetrain with no clutch or torque converter that is solidly connected does it only occur when under power? On smooth, flat roads, I can turn it on and off like a switch with the accelerator pedal as I coast along. I do not get it all all under any level of re-generation. Wouldn't a mechanical noise be present whenever the whole mechanism is spinning?
My non-Performance drive unit had the "milling" sound in low-power drive or regen. It was easier to reproduce for testing in drive though since I could "hold" power in the range needed than I could hold regen in that range.
Tesla seems either unusually proactive about this issue or worried about the public perception of it. If you post about a DU problem here, you pretty much always get a call from your SC (presuming they can link your username to real name). A week or so ago I mentioned that my clunking noise had started to return after being replaced and got a call... which reminds me, I still have to return their call. Whatever the reason, it's nice that they seem to care our issues are being resolved.Well I'll be darned. I just got a call from the Rockville MD service center (should I mention who called me?) and they explained that they want me to be happy with my car, and have scheduled me for a DU replacement at 9 AM on October 9th.