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11-15-2011, 09:27 AM
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GM Manual Transmission Identification?
The right side numbers are 3925658 8338GM NFc4.
The shifting case is 52254 GM7. Can anyone help with identifying this 4spd? Thanks! 
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11-15-2011, 10:12 AM
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that was the right side..the left side numbers are...
Left side shows GM 6261888?
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11-15-2011, 11:02 AM
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Awfully close to a Muncie (3925660). Not a T10 (1304 series); If its iron and has all three shift levers on the side cover, its a Saginaw.
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11-15-2011, 11:12 AM
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I don't have my book right now.
Any idea which year? Is it from a car or truck? My books only cover 65 - 75, but I'll look them up tonight.
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11-15-2011, 12:21 PM
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3925658 is the p/n for the 1968-'69 Muncie "M-type" main case (casting number 3925660).
I'm thinking this is a cast iron Saginaw, the casting number would be 39255656 though. Casting numbers are notorious for being vague and hard to read.
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11-15-2011, 06:01 PM
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3925656 is the casting number for the saginaw used in 68-75 at least. But the other numbers don't match the extension or sidecover casting numbers.
Like Cobalt said, it is very easy to mistake a 6 for an 8 in these castings. 3925658 does not match any casting numbers in my books. Any more information about this trans? Pics?
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