When i let off the pedal, the front motor has a pretty high pitch whine, is this normal? Regen is on standard, i opened a SC but they wanna charge me for the diagnostic so i wanna see if anyone else is experiencing this.
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Loud whine from front motor when decelerating
- Thread starter fluxcapacitor
- Start date
The front motor feels noisier than the rear. When you let off the pedal, regen is using the motors (in reverse if you will) to charge the battery. Normally this happens from the rear as the car is very rear-biased. However, since the last few software updates, the car is better at detecting slippage in the rear and using the front in that situation. It becomes a more balanced AWD car. You can look at Bjorn Nyland's Youtube video stating that Tesla now has a "snow mode".
I can definitely hear my front motor more on regen now in the winter, for example after I've slipped a bit. Confirmed by ScanMyTesla which shows my front motor getting more usage in acceleration and deceleration now than last winter.
* I would say this is normal behavior *
I can definitely hear my front motor more on regen now in the winter, for example after I've slipped a bit. Confirmed by ScanMyTesla which shows my front motor getting more usage in acceleration and deceleration now than last winter.
* I would say this is normal behavior *
thesmokingman
Active Member
thesmokingman
Active Member
You can definitely hear it from inside the cabin. I dunno from the outside for obvious reasons but judging from people outside they don't seem to be alerted to the decel. I wonder if this is a case of being new to EV, and maybe Tesla's stronger use of regen?
I came from an sr+ to an LR so it is technically new to me having the front motor there now. Just thought it sounds louder than normal but i'm not quite sure.
thesmokingman
Active Member
I see, yea it would be a new thing for you since your regen in the SR is much more muted. In RWD cars, rear regen is not strong because of the braking torque, it needs to be balanced with the front This is something that made even F1 teams struggle when KERS first came out. Thus for you, you're going to have a shock as there is more noise in front.
Agreed that front motor noise makes it into the cabin more than rear motor, on dual motor Teslas.
That said if your regen sounds as loud as a Prius or other Toyota Hybrid (comparing from outside the cars), that would be unusual for a Tesla in my experience.
That said if your regen sounds as loud as a Prius or other Toyota Hybrid (comparing from outside the cars), that would be unusual for a Tesla in my experience.
It also makes a lot more noise when you are in modes where it uses the motors to heat the battery- such as on the way to a Supercharger or when it's really cold out. The heating in a Model 3 comes from purposefully running the motor in an inefficient mode, which is also noisier.
Took it into sc the other day and they said they will be replacing my front drive unit
Did they give you any more details? How many miles on your vehicle?
Glad to hear they're going to get you squared away!
they didn't, i have a 2018 with only 21k miles. She's going under the knife on the 25th of this month so yeah. The car drives fine however, it just has a loud whine.
puffdaddy
Member
I have a whine too that sounds like a distant emergency siren. It's not that loud (my kids noticed it first). Normal?
puffdaddy
Member
Nearest SC is 3 hours away. I guess I'll bring it in if I have another thing to check (or it get worse). It drives great
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