[unruhjonny]

Originally Posted by Lee

Years ago, I worked on a '72 GTO with floor shifted 3-speed. It was the original owner, he had traded his rust-bucket (his words) '65 GTO for it in '71. I remember the tranny had an iron or steel case, and was quite heavy. I also remember it having Ford designations on it, and the owner assuring me it was original.

if it had a Ford logo on it, then not so much.

I know some late 1960's Pontiac applications (including GTO's) used the Ford toploader.

It is possible that something happened and a three speed from (oh lets say) a 1969 GTO could have been swapped in - if everything was grabbed, it would have been a complete swap over... assuming of course that the driveshaft length was the same.

GM developed an in-house heavy duty three speed, and phased it into production on select very late 1968 model year Chevrolet cars;
It became the standard (accross the board) HD three speed for the 1970 model year, and remained the only HD three speed that GM used till somewhere around 1975;
After they ceased to be used in cars, they continued to be used in trucks.
I believe all but a few of the passenger cars had the "B" gear set, and all the trucks, and a few of the cars (read: wagons) used the "A" gear set;
"A" gear set: 3.03/1.75/1.00/r3.02
"B" gear set: 2.42/1.58/1.00/r2.41

It has a full cast iron case, I am told that it is pretty much indestructible, and let me assure you, it is SUPER heavy.