I suppose that I'm now thoroughly confused about my drivetrain.
From all of the literature that I've seen, the car was originally supposed to have a 3 speed gearbox. My transmission is a four speed marked "Type M-3, Det Nr 254160 and Tillv Nr 1450. (see post #80, page 8). I think the type M-3 is a 3 speed gearbox, but I don't know. In my box of "spares" (loosely defined), I do have a shaft that I assumed was a transmission first motion shaft. Perhaps the transmission was modified from 3 to 4 speeds, but I think it is unlikely since the transmission cover was modified. (see post #94, page 10). I'll need to examine and identify that part more carefully.
Now the differential is also unexpected. All of the literature that I've seen shows a final drive ratio of 4.5:1. So after scarping off decades of greasy buildup, I was surprised to see a the 41/0 tag on the differential, indicating a 4.1 rear end.
I like the Chris' fridge magnet idea. I also need to do something like that for the key bypass / button under dash starting instructions.
