Electric 818 trans ?

[C.Tree]

How would the trans work in an electric 818?

I'm thinking; electric motor then fix the input and output shaft together(I think its 3rd gear when the in/out are engaged)(at this point you can discard the counter shaft) then to the diff. then drive shafts then wheels.

For reverse could you reverse the polarity to the electric motor?

From here you would have to deal w/ the diff ratio. What ratio would be optimum for an electric motor? I'm thinking 1:1; so the pinion and ring would have to have the same number of teeth. I dont think such a gear exists for the subie trans so is the next logical step a whole different tran?

Thanks to all the electric experts!

[BipDBo]

Many EV DIYers keep a shiftable trans. One reason is that the EV motors that OEMs are using have a broader power band than motors available off the shelf.

If you want to go single speed, it may be best to scrap the Subie transaxle. My engineering college participates annually in the automotive competition where they build a small race car powered by a motorcycle engine and transmission. I don't remember how they did reverse. They likely either didn't have it or used a motor. The transmission is connected to the differential driveshaft with a chain and sprockets. Perhaps an EV could be done the same way. Just chain the motor to the differential. That would save a lot of space and weight. You could easily swap out different sprockets to experiment different ratios for different applications (top acceleration, top speed, commuting efficiency, etc)

[Xusia]

Wouldn't it be much simpler (and stronger) to simply connect the motor directly to the rear differential? If you need to play with ratios, you can do that inside the differential...