Flywheel Identification
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
Well, I just ordered the expensive ring gear (2GA-6384-A) which should fit. If this doesn't work out, I'll contact jmadsen for his assistance. Thanks everyone. I learned quite a bit from this discussion.
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
Thread Starter
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
No, but I did remove the old one (without breaking it) so I could more accurately measure it. Used my oxy-acetylene cutting torch to heat it up and remove it. Took about 5 minutes of warming and a brass punch to knock it off since the flywheel is such a large heat sink. Installing I should think is easier since you can heat the ring gear separately and then drop it onto a cool flywheel. I will install the gear probably this weekend and then send the flywheel out for resurfacing.
Fleet Mechanic
Joined: Aug 2010
Posts: 1,994
Likes: 3
From: Morgan Hill, CA
No, but I did remove the old one (without breaking it) so I could more accurately measure it. Used my oxy-acetylene cutting torch to heat it up and remove it. Took about 5 minutes of warming and a brass punch to knock it off since the flywheel is such a large heat sink. Installing I should think is easier since you can heat the ring gear separately and then drop it onto a cool flywheel. I will install the gear probably this weekend and then send the flywheel out for resurfacing.
Welder User
Joined: Feb 2009
Posts: 5,269
Likes: 50
From: northwest MT
It also doesn't hurt to put the flywheel in the freezer for a while as well. I have done this task a couple of times. It helps to have the flywheel sitting on a nice flat surface. If all of the stars and planets are aligned properly, the ring should just drop right into place - assuming you have heated the ring gear up sufficiently!
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
I hope I missed my chance at throwing it into a snow bank. It is a whooping 41 degrees here today and the snow is starting to melt down. I have to temper my enthusiasm though because here in Michigan the weather is always changing. The saying goes "If you don't like the weather, wait a day, it will change".
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Fleet Mechanic
Joined: Aug 2010
Posts: 1,994
Likes: 3
From: Morgan Hill, CA
I hope I missed my chance at throwing it into a snow bank. It is a whooping 41 degrees here today and the snow is starting to melt down. I have to temper my enthusiasm though because here in Michigan the weather is always changing. The saying goes "If you don't like the weather, wait a day, it will change".
My wife always loves it when I bring parts into the kitchen!
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
Never again while she is home!
Believe Nothing
Joined: Jun 2004
Posts: 7,516
Likes: 403
From: W. Central FL.
Glad you got the correct gear. As sloppy as those starter gears mesh with the flywheel gear, would a two tooth difference actually make a difference? I kinda doubt it. Guess it would be determined by the thickness of the teeth.
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
I'm not sure but from what I know, Ford used a 10 tooth starter drive gear for the 112 tooth ring gear and a 9 tooth starter drive gear for the 114 tooth ring gear. This is actually what caused me to look into the different ring gears as I noticed that Mac's sell a starter drive for the V8 flatheads with the same part number as the one they sell for the 226. I assume it is a 10 tooth and I thought since the V8 never used a 114 tooth ring gear they must be for a 112 tooth ring gear. I plan on replacing my "bendix" starter drive with one of the more modern barrel type drives and I believe they are all 10 tooth units for the flathead. I don't think they would mesh well with a 114 tooth gear. But, I could be mistaken . . .
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Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
You won't believe this but the darn 2GA-6384 ring gear didn't fit! 
The ID was too large. The original was 13.040" while the "2GA" I received was 13.090". Fifty thousands too big which allowed it to drop over the flywheel without heating. Not good!! Now I suppose the ring gear could not actually be a "2GA" as it has no part number or it could be I need a different ring gear. If anyone has a good ring gear with these dimensions please let me know.
13.040" Inside Diameter
14.190" Outside Diameter
.575" Inside Diameter to Top Of Tooth
.370" Thickness
I think I may be looking at purchasing a used flywheel at this point!
The ID was too large. The original was 13.040" while the "2GA" I received was 13.090". Fifty thousands too big which allowed it to drop over the flywheel without heating. Not good!! Now I suppose the ring gear could not actually be a "2GA" as it has no part number or it could be I need a different ring gear. If anyone has a good ring gear with these dimensions please let me know.13.040" Inside Diameter
14.190" Outside Diameter
.575" Inside Diameter to Top Of Tooth
.370" Thickness
I think I may be looking at purchasing a used flywheel at this point!
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