Flywheel ring gear.....

[41panelmark]

Guys, I am guessing that the ring gear on a stock flat head is the same size for all correct? I have a flywheel with bad teeth on that gear and would like to have it replaced. What is the best method for replacing one or who should do it, i.e., machine shop?

I see that places like Mac's carry them, which company has the best and or correct part?

thanks.

[flatheadmurre]

There are different sizes depending on what year the engine is.

[Tony, NY]

You can do it yourself. Grind a slit in the old one and use a chisel to split the last bit. Use heat on the new one and drop it on. It's been a while, but that's what I recall.

[51504bat]

Mark,

I bought mine from Joe's Antique Auto in MA. www.joesantiqueauto.com
(508) 278-3980 Good guy to deal with and shipping is fast and reasonable. I cut a slit in the old gear and knocked if off with a punch. I put the flywheel in the freezer and heated the ring gear on the barbie to warm it up and it slid on the flywheel no problem. Just make sure you install it with the teeth bevels going the right direction.

[41panelmark]

Thanks, I will get one coming, guess there are different sizes at mentioned above so I will give them my size when I order one.

[jake197000]

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u can knock it off with a punch.clean everything,lay the new one one the flywheel in the correct direction.go round it with acetilinene torch itwill drop right on.may be a tap or two to seat it. its easy.just dont turn it red.good luck. its fun!

[Karl Wolf]

Originally Posted by jake197000

u can knock it off with a punch.clean everything,lay the new one one the flywheel in the correct direction.go round it with acetilinene torch itwill drop right on.may be a tap or two to seat it. its easy.just dont turn it red.good luck. its fun!

X2... But, I've used vise grips, hold it up, torch in the other hand- heat up to hot, not red. Drops on.

Karl

[48 coupe]

There is a difference in the set back on the teeth. Check it out good . I think early 32 to 48. then 49/ 53.

[flatheadmurre]

There is 2 inner diameters of the ringgear depending on early/late.
Knock it of, notch it with a grinder and break it with chisel...lots ot ways to get i off.
Dont overheat it, an oven aint a bad thing.

[Ronnie]

It is either an 8ba or a 59a nothing else.

R

[Fordestes]

As stated previously, be sure and take note as to the direction of the beveled edge of the teeth, We have been known to flip the used gears side to side and rotate a few degrees, engines stop in specific positions and create a wear spot, so we rotated the gears to offset the wear spots and use the un worn side, I have seen starters try to hang and delay engagement on the unbeveled side however. ( we had to use what we had sometimes ) but it worked!

[flatheadmurre]

Here´s some pics of the different types.
8BA has the larger inside diameter.
Rest of the gear is identical.