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Muncie/W-30 Build Date

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Old January 25th, 2020, 07:49 AM
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Muncie/W-30 Build Date

1970 W-30 with a Muncie M-21 stamped POS21B and a trim tag stamped 11D. Does this combination seem either possible or probable ?
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Old January 25th, 2020, 04:23 PM
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Yes, It codes out as follows:

P = Muncie
0 = 1970 model year
S = November (1969)
21 = 21st day of Nov
B = M21 gear sett

Last edited by BackInTheGame; January 25th, 2020 at 04:25 PM. Reason: added year of manufacture
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Old January 25th, 2020, 09:27 PM
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Originally Posted by BackInTheGame
Yes, It codes out as follows:

P = Muncie
0 = 1970 model year
S = November (1969)
21 = 21st day of Nov
B = M21 gear sett

If Built Nov 21,1970 Would it not be for a 1971 Car ... ?
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Old January 26th, 2020, 07:57 AM
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No, Muncie marked the model year on the trans. From the marked month and date, we know it was actually built in the calendar year '69. If it had Month and Date of 01/01 (or later), we would know it was built in both the MODEL and CALENDAR year of 1970. Later in the 1970 CALENDAR year they began manufacturing the 1971 MODEL year transmissions, etc.
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