The Stovebolt Site Forums The Shop Area Engine Shop flywheel problems i need help

i cannot figure this one out guys, i have a 50 3/4 ton truck, and i have a 54 motor 235. iam going to a 12 volt system with a 12v starter. i ordered aring gear for the flywheel 168 tooth and it is to big to fit.i bought it from lmc truck, and they said it was for a 55 and up.so are the flywheels diffrent from 546v to 55 and up 12v ? inliner thanks for any info.

Hy rodC66, welcome, according to my Canadian parts book, the 55A or first series, and the 55B or second series flywheels have different part numbers, of course it doesn't tell me how they are different, just that they have different part numbers. The flywheel ring gears of course will have different part numbers, due to the different pitch between the six and twelve volt ring gears. One thing you might consider, use your six volt starter on twelve volts, it won't hurt the starter as long as you don't have to crank the snot out of it to get it started, hope that helps.

The OD is different on 6 and 12 volt flywheels for the gear.
Most people run the 6 volt set-up on 12 volts.

thanks for the comeback,.so they did use a different flywheel when they went to 12v in mid year 55.i knew something was wrong.i wonder if the 12v flywheel would bolt up to my 54 year? if not then i will do the six volt starter on the 12 volt system.but should i go to a 12 volt solenioid? thanks again.things aren't as cloudy as they were. rodc66

as ed mcmahn would say, you are correct sir.the o.d. on my 6 volt flywheel is13.075 and the i.d. on the 12 volt ring gear is 13.250. just enough to not fit unless i wanted to get the vsmoke wrench out. i guess not. thanks for the come back guy rodc66

1942-62 used the same bolt pattern for mounting to crank.