5 ms·

> The lurch when the transmission shifted during launch was too hard on the transmission, and many of them broke under warranty. Tesla had to replace many trans

by Goz3rr 4y ago

> The lurch when the transmission shifted during launch was too hard on the transmission, and many of them broke under warranty. Tesla had to replace many transmissions. It was easier to fix the problem on the electric side than the gear side. Seems to me this was more a problem with Teslas build quality or design, because the Porsche Taycan and Audi e-tron GT have a two speed gearbox. From when I drove the e-tron GT this shifting was almost completely imperceptible, no lurching of any kind even when launching it in sport mode. If you're driving in anything other than sport mode the car will spend most of its time in second gear anyways, not even using it from a standstill.

timc3 4y ago
I can feel it on my Taycan (it’s one of the most powerful models) but it’s not bad at all. Porsche has a lot of experience with gearboxes which probably explains why they can build a reliable one when dealing with the power and torque.
- olivermuty 4y ago
  How is the maintenance aspect of this? One of things I like about my EV (Tesla) is that mechanical maintenance is essentially zero, whereas I had to pay 1000 eur every second year to service my Mercedes automatic transmission...
theluketaylor 4y ago
Only using first gear for hard launches helps, as does the fact they are using dog clutches in addition to traditional friction plates. The coolest part is the rear motor can be completely mechanically decoupled from the axel so it can just coast. Most other EV just shut of power to the motor, but Taycan can freewheel on the rear axle. Jalopnik did a huge in depth on the whole powertrain that is really interesting. https://jalopnik.com/an-extremely-detailed-look-at-the-porsche-taycans-engin-1837802533 https://jalopnik.com/an-extremely-detailed-look-at-the-porsc...
labcomputer 4y ago
> Seems to me this was more a problem with Teslas build quality or design, because the Porsche Taycan and Audi e-tron GT have a two speed gearbox Actually, Tesla outsourced the transmission, first to Bosch then to Borg-Warner. Apparently neither of them could design and build a suitable gearbox.

by Goz3rr 4y ago

timc3 4y ago

I can feel it on my Taycan (it’s one of the most powerful models) but it’s not bad at all. Porsche has a lot of experience with gearboxes which probably explains why they can build a reliable one when dealing with the power and torque.

olivermuty 4y ago
How is the maintenance aspect of this? One of things I like about my EV (Tesla) is that mechanical maintenance is essentially zero, whereas I had to pay 1000 eur every second year to service my Mercedes automatic transmission...

theluketaylor 4y ago

Only using first gear for hard launches helps, as does the fact they are using dog clutches in addition to traditional friction plates. The coolest part is the rear motor can be completely mechanically decoupled from the axel so it can just coast. Most other EV just shut of power to the motor, but Taycan can freewheel on the rear axle. Jalopnik did a huge in depth on the whole powertrain that is really interesting. https://jalopnik.com/an-extremely-detailed-look-at-the-porsche-taycans-engin-1837802533 https://jalopnik.com/an-extremely-detailed-look-at-the-porsc...

labcomputer 4y ago

> Seems to me this was more a problem with Teslas build quality or design, because the Porsche Taycan and Audi e-tron GT have a two speed gearbox Actually, Tesla outsourced the transmission, first to Bosch then to Borg-Warner. Apparently neither of them could design and build a suitable gearbox.