Originally Posted by scrapiron (Post 1567314)

If you are sure of the year, and you have an 11" clutch, it is from a larger truck, F6 or F7. Not sure of a flywheel difference.
Check this guy, 715-677-3809,,,ring gears are his thing,

Originally Posted by Daves55Sedan (Post 1567599)

I have a 6-cyl clutch & flywheel with ring gear out in the garage and I have a Ford-O-Matic converter front plate with the ring gear on it. The ring gear for the Ford-O-matic should match closely with what you should have I think. I will try to measure them both.

Originally Posted by 46international (Post 1567218)

I have a '59 292 motor that may have come out of a truck and I'm having a hard time finding a ring gear for it, it uses a 11" clutch. I ordered one off of the internet and it was too small to expand over the flywheel. I have found another one at NAPA and they list the inside dia. After measuring the flywheel, and comparing that to the listed I.D. it looks like the gear will have to expand .15 total to go over the flywheel. That sounds too much. I did not measure the other gear before I sent it back, but it was too small.
I guess what I'm asking is, is there a difference in ring gears for flywheels that use the 11" clutch? What about if the flywheel came from a truck, maybe even a large truck?

Originally Posted by justold (Post 1567656)

Count the teeth .

Originally Posted by KULTULZ (Post 1567696)

Do you happen to see a Casting ID No. at the mounting flange? The Basic PN should read 6384. Need the characters before and after.

Originally Posted by 46international (Post 1568211)

You mean on the flywheel? I'll check tonight.

Originally Posted by KULTULZ (Post 1568293)

Yes, in the recess at the crankshaft mounting flange. This can be crossed to the flywheel PN and once application is determined to can find the ring gear PN by itself.

Example Only- B8T 6384-C

Originally Posted by rotorwrench (Post 1568357)

Most of the Y-blocks used the same basic flywheel size but the thing can be drilled for different size clutch covers. FoMoCo made a lot of different Y-blocks but most of the ones for smaller trucks and passenger cars have interchangeability. The Big Job engines like for F7 & F8 trucks and Lincolns, not as much. A 10-inch clutch is plenty good for most Y-blocks anyway.

The ring has to be tight on the wheel. Put he wheel in the freezer and heat up the ring gear and they will generally drop right on there. According to some replacement procedures in older Ford publications. The ring is to be heated uniformly and they mention using a torch but as a general rule 250 degrees F is hot enough so an oven can be used as long as you can talk the wifey into it. Good luck with that.

Originally Posted by 46international (Post 1568496)

The gear that I can buy from NAPA has an I.D. of 13.352" I measured the flywheel at 13.477" so that meand it must expand .125 total. Is that too much?

Originally Posted by KULTULZ (Post 1568521)

The only thing I can think of is that the flywheel itself was pretty much STD to car/truck of the period. 146T RG is an EAA 6384-A.

GOOGLE the PN and you will find suppliers and maybe can contact them for exact measurements.

What are you working on?

Originally Posted by rotorwrench (Post 1568575)

An interference fit is dependent on the overall diameter of the fitting parts. It starts at around .0015" per inch at 1-inch diameter but then starts to decrease per inch the larger the diameter gets. I would say that it would need to be around the .015" figure give or take. The larger the diameter the more it expands when heated. An eighth of an inch is way too much. The flywheel, starter, and bell housing will have to work with each other.

If you heat it much hotter than 300 degrees, whatever temper in the teeth will suffer. If you heat it blue and it still won't go on then that is telling. I'd say you have the wrong flywheel for the application or you have the wrong starter ring.

Originally Posted by KULTULZ (Post 1568521)

The only thing I can think of is that the flywheel itself was pretty much STD to car/truck of the period. 146T RG is an EAA 6384-A.

GOOGLE the PN and you will find suppliers and maybe can contact them for exact measurements.

What are you working on?