Here is the hand stamped number off of our Saginaw :

14U111414

Here are the casting numbers :

Main : 3925856
Tail : 3522(5or6)4
Side Plate : 828188(8or6)

Hope this helps.

Thanks,

Tim

14U111414 is the VIN code from the original appliacation

1-Chevrolet
4-Model Year ending in 4, 1974, 84 ?
U-Assembly Plant U=Lordstown, Ohio
111414 are the last 6 digits of the cars vin, if it match your VIN you have a numbers matching trans.

I can't find any info on the rest of the numbers. My data only goes to 1975 and this may be later?

It comes from a '74 Vega or a full-size Van, these were the only models built at Lordstown in '74, Chris