speed77

Anyone have this issue when at the higher end of 1st gear? Is it normal? Feel like when I’m hitting 40-55mph there’s a loud whirring sound from the battery. It’s silent in 2nd gear. Not sure if this is normal.

also, after 1300miles PSCB are starting to have brake squeak but that’s life I guess.

RingoDingo

There have been a number of threads in other places addressing this noise. It's typically described as a low hum or drone that starts around 40MPH (in Sport or Sport+ only) in first gear and stops once the car kicks into second gear. Apparently heard only in the base and 4S models, which have the smaller drivetrains. Very, very common and Porsche claims it is "normal" though I find the noise annoying. There's a guy on another forum that was a noise and vibration designer for GM who think it has something to do with the mesh in the transmission amplifying the sound waves and creating this loud noise. You can get a new motor or whatever, but it's just as likely to happen again as it seems to relate to the design, rather than anything being wrong per se or malfunctioning. I'm planning to learn to live with it, though I have it on record with the dealer should anything actually go wrong in the future.

speed77

thanks for the info. Not annoying enough for a new engine. But it is annoying. I’ve got a turbo so suprised

RingoDingo

Interesting - could be general design but maybe more common with the lower end models. Anyway, not worth a new drivetrain... there's a guy that had the whole rear drivetrain replaced by Porsche and then it was quiet for a while and the sound came back in the new drivetrain (again, implying a design flaw rather than an individual issue). I didn't notice this until a while into ownership, so either it was there all along and I never noticed it or it became more prominent a few thousand miles in. It's like a droning sound, right? The key is it comes on around 40MPH only in first gear and then goes as soon as the car kicks to second.

speed77

Yup this exactly. Right around 40 mph

kort677

almost all of the very early tesla model Ss had to have their drive units replaced because of similar noises but at far lower speeds. maybe the drive units need to be checked

RingoDingo

Maybe, but I think they would have done so by now or there would be some kind of service bulletin on it. The service people at Porsche Austin, which I suspect probably has sold more Taycans than any dealership outside of California, were 100% unfamiliar with the issue - I had to go on multiple ride-alongs before they could hear what I'm hearing -- it's very subtle, but very recognizable and consistent once heard. I suspect its some kind of resonance from the design, rather than anything being "broken" per se - just an unattractive sound.

Jeffery_

I guess it is important they look into that

RingoDingo

Unless these drivetrains are all ticking time bombs, I suspect this is all just aesthetics (i.e., an unattractive sound noticeable only to those keen to hear it) rather than a mechanical fault or failure in waiting per se -- given that there isn't any precedent for what a two speed transmission in a Porsche EV is supposed to sound like, I'm not sure we have much leverage if Porsche says it's "normal" because... I mean... normal compared to every other Porsche Taycan? Maybe they have a point?

speed77

Im on a one year lease with a dealer I have a very good relationship with. Not super worried. If drivetrain goes, it goes. Seems like a lot to try and diagnose just to potentially have the same issue.

On_Your_Left

I've got the issue as well on my '21 Turbo S. It's currently at the dealer where both the rear diff and transmission are being replaced. I've read the other threads where the issue is known to return, but I figured I'd try this once and see what happens. Will report back if the sound returns.

RingoDingo

Yes, please do report back - both whether the replacement solves the issue and then again if it comes back. I've heard of both things happening post-replacement, which would certainly incentivize me not to bother.