My 1925 engine with number 11 542 163 (April 11, 1925) which is not ice-crewed yet has the narrow older brake drum, but does it have the new T-3312 for 26-27?
What does "ice-crewed" mean?
From the change notes in the encyclopedia
JUL 27 Engine production records, Ford Archives
Last old style engine (12,218,728) built at 5:51 P.M. and new (1926) type engines began on the third shift.
This means your engine is still the old style with the small brake drum in the transmission and the old style parts.
hope this answers your question.
What's a T-3312?
T-3312 is the six stamped steel lugs for the clutch. Some of the 1925 engines had these on the brake drums. I believe it's been discussed here before.
Isn't that the transmission brake drum lug shoe?
Tom's faster than me
OOOHHHH, thaaaat T-3312! Thanks guys!
Mike Walker, "ice-crewed" is Swedish for FROZEN. ha.
You will actually need to take a look at your brake drum to see if it does or does not have the removable brake lugs. Why? First, because Ford USA also made a replacement drum for the earlier cars using that same concept.
Ref: http://www.mtfca.com/encyclo/S-T.htm#tran1 which has:
3311B (T-750B) Wider drum using the same gear and bushings as 1925. Steel shoes (3312 (T-754) were added to the clutch lugs. (Later replacements for the earlier brake drums also had these steel shoes.) The large clutch plates (T-728B) were redesigned to fit the new drum. These plates could also be used for replacements in earlier transmissions.
So if the brake drum was damaged and replaced by the Ford dealer -- it could easily have the removable lugs.
Second as Tom shared above apparently the late USA 1925s also had the removable lugs from the factory see:
Hap l9l5 cut off
Thanks everyone for answers, I have all three variants, fun to know, searched for the encyclopaedia but did not find what I know now.