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What transmission do I have? I had always believed it was from my 1925, but not sure. (It never really mattered, I used a different one.)
The main housing casting body carries the following cast number: 590204. Below this is a circled "D" and a "B." A small machined boss surface at the rear of the main housing body has stamped numbers as follows: L132
I guessed this might be a date code of Dec. 13, 1922. But my other spare transmission (that I believe is a '28) in this same location has a much longer stamped number, too many digits for a date code.
The shifter cover has the following cast number: 590061 and an "R" above that.
The input shaft bearing housing has the following cast number: 590211
I would ultimately like to sell this to someone who needs it, but I need to figure out what it actually is first!
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Technical Advisor ChatMaster - 10,000
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The 28 transmission has the date code on the drivers side near the top. Go to Teck Talk and you will find casting numbers for many items to include transmissions.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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I may have one like that also, The one I have has a letter D in a circle as well. I got it years ago from a guy who did a lot of scrapping and since the knob looked like the one on Dads 490. The shifter lever has a "Jog" to move it closer to the seat and it has a cast iron cap over the shifterhousing that moves with the shifter. The cap is like the one on my 23 Olds truck and on other model 43A cars I have seen. Dad thought it might be a truck trans since the input shaft is so heavy but we aren't sure either. After I looked at it a few weeks ago I wondered if it could be from a Chevy T truck or FA or FB. I will post pictures of it.
28 Chevy LO Capitol 1 ton, 28 National 2 dr coach, 71 Chevy Custom Camper 3/4 ton. Also 23 Oldsmobile Economy truck and a 24 Olds sport touring.
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Hi, Ray -
I spent some time in Tech Talk, read throough the Casting Numbers post, etc -
but I don't find anything that addresses the casting numbers on the earlier 1920's transmission casings. It is distinctly possible that I am being blind, but I don't find it.
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Shade Tree Mechanic
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My info on casting numbers is as follows:
TRANSMISSION CASE,
Year Casting No
16-21 14181
25 590204
26 590219
28 590321(F 13 8)or 590328 or 590279 (I 8)
TRANSMISSION CASE COVER
Year Casting No
16-21 14182
25 590061
27-28 590281
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Technical Advisor ChatMaster - 10,000
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Chevy Guru, Go to Tech Talk, HOTLINKS, scroll down to entry 90195.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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I have noticed that the transmission cases went from coarse threads to fine threads on the bolts to hold the transmission cover. Any idea when the change?
How Sweet the roar of a Chevy four!
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Thanks, Gents - I found it, Ray.
So then, it IS from a 1925. Interesting that we don't have casting numbers for the 1922-24 period, but have the earlier ones.
Anyone have need of a used 1925 transmission, or for that matter, I have a '28 that is allegedly rebuilt.
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