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by Animats5 hours ago |
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upvoteby egorfine4 hours ago|
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This is a straightforward way of electric conversion. You plug in the motor in the place where torque is expected and let the rest do its job.

Gearboxes in EV conversions are usually locked in the highest gear with clutch and lever removed.

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upvoteby imglorp1 hours ago|
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How much friction loss do you get going through a transmission compared to direct drive?
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upvoteby egorfine1 hours ago|
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I'm not sure a direct drive is possible with EV conversions. You still need to match effective RPM range with diffs. And replacing transmission with a simpler specialized diff would cost much, much more than just using the existing transmission in place.
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upvoteby cucumber37328421 hours ago|
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Negligible. Roll the windows up if you want that range back.

I still think it's dumb and they should package it to replace the transmission and stuff all the batteries where the engine would go.

It would be "easy" to make the motor replace the bellhousing and midsection of a 4L80 and then simply provide the same output so you can stick whatever tailhousing you want on it. Put shifter on the side in the same spot, etc, etc. Could've packaged the batteries to fit in the same place as a SBC longblock.

I can't really come up with a "good" reason they did it the way they did. Like either replace the engine so it can work with "any" transmission that can handle the torque (i.e. most of them) or replace the transmission too. Don't replace the engine and then mandate a particular trans. The only reason I can see to do that is if it's some sort of wink and nod deal where they know that it's easy to make it work with other transmissions but they're not touting it as compatible to cover their asses.

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upvoteby CamouflagedKiwi3 hours ago|
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Presumably so it's an easier conversion - you replace the motor but don't have to replace the rest of the drivetrain, and maybe you want the gearstick inside for the look of the thing (although I imagine you likely wouldn't have to use it most of the time).
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upvoteby jakogut4 hours ago|
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Probably to interface with existing cars by replacing the engine, retaining everything after, including the existing transmission, differential(s), and suspension.
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upvoteby tecleandor3 hours ago|
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It says:

"The current eCrate kit requires a GM 4-speed automatic transmission with an external mode switch (e.g., 4L60, 4L65, 4L70, 4L75 Transmissions). This helps to make the eCrate conversion easier for vehicles that already have a conventional driveline, plus it provides extra torque in lower gears and extra speed with overdrive. We are working on bringing a direct drive variant option to our eCrate portfolio."

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upvoteby consp5 hours ago|
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Reduction ratios, greater comparability due to interfacing links, attachment points, just a few guesses. Most ev conversions I've seen keep the gearbox.
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