i am rebuilding my 3 speed out of my '51. I have 2 transmissions with the same casting numbers. I took both apart to see if I could make one good from the parts of two.
Both the mainsheets differ in looks. Also, one has WT242 2C and the other has no part number.
WT242 2A
WT242 2B
WT242 2C
WT242 2D
Are they swappable? What is the difference
Many of the parts in both transmissions do not have parts numbers.
At
http://www.vapinc.com/chevy/Transmission%20parts/main.html has many of the transmission parts.