I have a 1940 Buick Special with a 263 engine out of a 1950-1953 with a manual transmission trying to find the year of the transmission # 1312397-6?
Thanks Jimmy.
Jimmy,
Specials from 1940-47 used a transmission with a short mainshaft and rear bearing retainer. From 1948-53 they used a long mainshaft and rear bearing retainer. Not sure the later type would fit into a 1940 model without major rework of other driveline components.
Attached are 2 pages from the 1940 shop manual showing the short type and 1 page from the 1952 manual showing the long type. The case looks like it's the same.