[oletrucks] 4 speed transmission identification

[Williams Grant Civ Det 2 418 FLTS/EN]

Gang,

Now that it's in my garage, what the H is it?

I have a GM 4 speed for a closed drive shaft with the following casting
markings on the left side of main assembly.

CON 5

5       L180

GM

591907

It may be from a 52 truck but ??????  I find lots of engine and head #s
available but not many for transmissions. 

Grant
50 GMC 100
46 Chevy Suburban
Albuquerque, NM
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959