Originally Posted by tclederman
Here is the information I could find in the 1954 Shop Manual. It states where to find the code; but, it does not indicate what the code is?

Of course, I could be missing something (I am getting older/slower every day).


Tim, do you have a different link.
It's showing Bumpers, Lights & Horn.

Also, don't know if this will help, but....

It looks like the change was in 1953.
1953 1st design & 1953 2nd design.
1954 is the 2nd design.

However, the same 3 speed Transmission Case,
with casting 591615, was used thru 1954.
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0372.htm

The difference between the 1st design & 2nd design
looks to be internal.

Here are some of them:

Main drive gear
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0402.htm

Clutch, gear & also the
Retainer, Synchro ring
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0404.htm

Gear, 2nd speed
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0405.htm


There was also a new 3 speed, heavy duty transmission in 1954. (not torque tube)

-Tom

1950 Chevy 3100 w/ 1956 235