I checked the parts placement sequence and if I understood correctly, the raised (nipple) part faced the crank/flywheel.
I have a spare 3 speed truck tranny and compared the lengths of the transmission main drive gear, the shaft end protruding from the retainer. Measuring the exposed section of the shaft from the retainer base to the end of the shaft there is a difference of 5/32”. The spare shaft is longer by 5/32”. The tranny on Sparky was reported to have been rebuilt at the same time the clutch and engine were done, as indicated previously.
In looking at the Master Parts Catalog (1929-1950), if I understand correctly, it shows the Main Drive Gears were shorter length for 4 Speed tranny’s vs 3 Speed, by 11/32”. I am now wondering if the wrong MDG was installed in Sparky???
Also, I think the possibility the rebuilt disc might be defective is a reasonable guess.
I am considering replacing the disc and maybe disassembling the tranny for a closer look???
Wow, when I stated earlier I’d be learning more about this stuff, I may jinxed myself....
