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Volt Gen 1 Transmission 4ET50 explained with real parts.

5375 Views 6 Replies 7 Participants Last post by  RobbertPatrison

Good video showing the internal parts.
The Gen 1 is really a very clever design.
Couple of things I really like:
Use of 2 electric motors
Use of "Clutch packs" for engaging or stopping rotating parts vs one way clutches on Fords.
Plus geared final drive vs Second generation Volts chain = early Prius, While latest Prius went to geared.

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The Volt transmissions are true Engineering miracles.
I find this description a bit long and confusing. And it is not entirely correct either. In the second EV mode both electric motors are running in parallel, each on one end of the planetary gear. The reason for this is to reduce the RPM of MGB at higher speeds, and with that improve efficiency. Kelly's description assumes that only the smaller MGA is running at low power, which is incorrect.

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