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What year is my 904?

NoGM4me

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May 17, 2021
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Location
Oklahoma
My 71 Challenger has a 904 transmission with a VIN of 8A123456. How do I know if it's a 1978 or a 1968? It's still in the car and a grease ball so I can't find any other markings on it.
Thanks, NoGM4me
 

tonysrt

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Mar 12, 2017
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I think you may need numbers off the tranny to help you. The newer tranny, 78, would have a part throttle down shift were the older would have a full throttle downshift.
 
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