I am trying to get some confirmation on which transmission I have and my numbers do not seem to match what I have read in literature. Maybe I am reading the numbers wrong (they are pretty worn) or hopefully someone has some can help me decipher what I have. It is a 3 speed in a 1956 3200 with a 235 engine. I’ll try to post pictures below. On tail piece, left hand side: GM 18 3(8?)707185. On case, left side: GM 12 38(6?)45122, then under that, C266. On side cover: 9845157. Sorry, the picture will be upside down as the stamp is upside down on the side cover (never mind that I could not figure out how to flip it).
