Ultra-Efficient EV Project (Chevy Sprint 2021 06)
Channel: TurquoiseEnergy
Date: 2021-07-08

The goal: ultra-efficient electric cars (including conversions) that will go 50% farther on the same batteries and similar performance with a 2/3 size motor. (target: 100 WH/Km, solar charging)
(Planetary gear: AliExpress.com)
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See Turquoise Energy News especially #157 & 158 -- TurquoiseEnergy.com

Note: My previous understanding of typical automotive transmission efficiencies (for the whole drivetrain?) was:
Manual: 70%
Automatic 60%
Looking it up now, it would appear there have been very significant improvements in the last 15 years, especially to automatics, especially with locking fluid torque converters.