It's a performance rear motor and drive unit from a 2015-2016 Tesla Model S P90D, similar to the one used in the 2017-2020 P100D. I'd consider last year "current."I think your confusion comes from outdated info. But since you weren’t able to do you own research, I’m happy to help. Heres a great article that not only explains why there is no transmission or gear box, but goes a little into what a transmission does, and even ends with the specific the specific misunderstanding you posted about older Tesla Model S (pre 2016)
“EVs only have/need a single-gear – or at least, this was true for the vast majority of electric cars made in the past decade. As a result of this, a transmission system is not needed in an electric car. And since there’s no transmission, there’s no transmission fluid required in an EV either!”
Hope this clears up your misunderstandings… I’m sure you’re not the only one with inaccurate and outdated information. Feel free to follow up with any questions or apologies.
Advanced Transmission states Tesla has a 1-speed transmission.
From the article you linked: "The Telsa Model S, X, and 3 actually have gears in the front and rear motors."
and: "Model S contains a form of gearbox which contains transmission fluid, hence the Tesla service checklist PDF says that the transmission fluid needs changing at the 12 year – or 150k mile – mark. And some people on the Tesla forums have even said they’ve been advised to change the transmission fluid at the 1 year – or 12.5k mile – mark instead."
Those are direct quotes from your article, so somehow you missed that there's a gearbox that holds the gears and lubricant and other stuff. And that the Tesla Service Checklist shows Transmission fluid.
InsideEVs shows the Tesla gearbox and oil filter. The lubricant it uses is Dexron 6, which is Automatic Transmission Fluid, though it's being used as gear oil in this case.
I did find your 17-parts comment on GreenMatters, it's a bit misleading for those who don't know how the gearbox works, or that gears even exist. Clearly if one looks at the pictures, they do.
Regardless, there is a gearbox, with gears, and lubricant. Very simple, very obvious. If there's a different drive system being used on some models, show it to me, I'll be happy to take a look at their new technology.
Meanwhile, here's other gearbox video (the gears connected to the universal joint are pictured):