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Trying to identify these, cleaned up and took pics of casting numbers. The transmission with tail shaft is 3 speed . Think the other is overdrive unit ? .

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The first is most likely a '41 as it has the Electromatic switchgear attached. Dont think electromatic was offered without OD after the war.

The second trans appears to be a Cadillac or LaSalle 3 speed--greatly beloved by hot rodders in the day

Can't see the entire unit but the top photo with the switches Ross ID's as 41 (or 42) may not have an overdrive -- The Electromatic Clutch was new and available as a standalone option in 41 and needed switches to tell it what gear car was in. The other pieces of the EC option mounts to the engine block and firewall. The trans may just have the adaptor end plate where the speedo gear and governor needed for EC inserts. From what I can see it looks like it might be the start of a driveshaft flange just behind the trans rather than the large case containing an OD.

If there is no OD unit then standalone EC, while rare, still might not have that much market today. So many think EC is not worth the trouble so disable and remove the units even when on an OD car. The trans could be sold as a 3 speed but the adaptor plate would need to go with it and without a governor that hole would also need to be covered.

For those with casting numbers, you can look them up in the parts manuals in the literature section.

Uncle had a 41 Packard and a 37 Lasalle conv so maybe these were spares to those cars. Thanks for the knowledge and insights!