700r4 ID

[69SCSS]

hey guys, been searching the net like crazy to find out what this trans is out of, and I'm leery of picking it up unless I know what it is actually out of, even for $100. But here's what the guy is giving me for the ID: 9Y3125D. That doesn't correspond to any of the decoders I've found. Most have a number for the first digit, three letters, 3 numbers, and a letter. 8 digits for 86-93 and 7 for 82-85, because it only had 2 letters for model. It also had an "M" on all of them. i don't know if this guy is reading the ID stamp wrong, but anyone have any idea? I'm going to be in the area tomorrow morning and will literally be driving right by, but if the guy tells me the ID is that and he's calling it a 700R4, I'm a little leery of even going by.

Any help is appreciated. A link to decode it would be great. I will still need to find a trans if this isn't the real deal.