Tom,

Thanks for the information.

Here is the Shop Manual link - sorry.

http://chevy.oldcarmanualproject.com/shop/1954truck/54ctsm0000.html

(I have corrected the link above, thanks, again).

I think the only differences between 1954 and earlier is briefly described in the first paragraph under Three-Speed Transmission:
http://www.1954advance-design.com/Documents/EngineeringFeatures/slides/orig_Page56.html

I am looking to buy a 1954 transmission - I'd like to be able to ID it, if possible.

Thanks,