Board index Flathead Power-Technical Questions, Answers, and Suggestions Pans Transmission ID

Transmission ID

Post Tue Oct 19, 2010 6:46 pm

Posts: 25
Location: Upstate NY
I have a 4 speed trans in my current Pan and I'd like to know when the trans case was cast. The part number is stamped 121-35. There is also a 1E stamped, not sure what that means. Finally, there is a little raised area that looks like a number plate was attached to the mold when casting and this raised area has a "3 3" on it. Am I right in reading the "3 3" as a March, 1953 casting date?

Post Tue Oct 19, 2010 7:16 pm

Posts: 2688
Location: Los Angeles, CA
The 3 3 code was used for many years during the mid '50's. No explanation why.
Here is a thread about it from ... +date+code

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