Anyone know how to read these numbers on these transmission? I know one is a Hemi the other is a 361/383. But I'd like to know when they were built, is that possible? Julian dates? Thanks.

H2538389 304 3789
H2538334 252 2864

You should be able to figure it out from this example I put together. See attached PDF file.

And this has some early model IDs

They're not "Julian" dates, they're based on a 10,000 day calendar and those don't match the year of the transmissions.

Most automatic transmissions I/we see are from the Kokomo, IN transmission plant & the part number is preceded by "PK". What plant is identified by the "H"?

I'm guessing that this "H" plant coded things differently, anyone have another early trans to check?

If the 252 & 304 are days of the year (252 = Thursday, September 9, 1965 & 304 = Sunday, October 31 1965). I'm not sure that works with one of the days ending up on Sunday.

RacerBill, got pics?

Here's a "J" case with a 392 date code so it can't be the day in a year code.

These are the #'s on my survivor trans.can't seem to find the info..
PK34106681 3028 6913

PK - Chrysler Transmission plant in Kokomo, IN
3410668 - automatic trans used in 383 4bbl b & E-bodies
1 - (actually a "L") - ??
3028 - assembly date Tuesday, November 11, 1969 (Veteran's Day)
6913 - unit number (anyone know if this is - day, week, month, year??)

What's the SPD of your Super Bee?