Is it me or do 130 tooth flywheels count 131? I counted mine 3 times both ways and came up with 131. yes its off my 340 eng .Its been in use for many years.

Are you counting the top of the teeth or the bottom of the grooves seperating the teeth?

Either way the count should be 130

the teeth I'll count again

still get 131

i want you to balance my check book.

That must be a rare one, save it may be one of a kind. I counted one in a junkyard once, came up with 139, but counted it again after marking tooth 1 and came up with 130...
get one of these http://www.amazon.com/Crayola-Ultimate-C...eywords=crayola mark everytooth with a different color you should have 22 colors left in the box

SSeriously though, I am going to guess your #1 tooth is also your #131

Lotta guts to post that, we have all done bone head things. Mark the first one, start counting the next one, count the marked one last. Everything has a procedure to follow. Had a shop teacher who had all these sayings, one poster had the 5 Ps, Proper Planing Prevents Poor Poformance. Understood it better as life went along.

nope still 131, really...I dug out another "130" tooth fly wheel and marked and counted and low and behold 130! Then I remarked the oddball and re counted. I'm tellin ya it's 131! It came off my 340 that I ran for years in the challenger, no issues. All I can think of is the ring gear was replaced at some point with a [censored] part!

IT'S A MOPAR, NEVER SAY NEVER!!!!!

The OP is absolutely correct, there was a 131 tooth wheel used on late vans. Check out Pioneer FRG-131-CH.

http://www.amazon.com/Pioneer-FRG-131CH-Flywheel-Ring-Gear/dp/compatibility-chart/B0052XOHNQ

This question has been asked a few times over the years and most everyone said it's a Brand X part or else you counted wrong.

Neither Ford or GM V8s, at least the pushrod varieties, had any ring gears in the 130s as far as teeth go. Most started around 150 teeth.

R.

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Ok, cool, got to be made in metric land.

Some torqueflite 727 converters used a 131 tooth ring gear, same inside diameter as manual ring gear.

Will this later 131 tooth flywheel work on an engine originally equipped with a 130 tooth flywheel?

I'm sure it does, It was in my car for years till I pulled the motor to restore the car. Like I said a few times ran that flywheel for years no issues. I'm setting the car up with a 383 now and needed a flywheel, that's what started all this counting. Mopar just to make things difficult. Gotta love this stuff. If it was easy everybody would have one.

As the tooth pitch is the same (same starter gear), the 131 tooth wheel would be 131/130 times original diameter. It would move the pitch diameter out less than 1%. It's probably within tolerance for mesh, or else the starter was moved out a little. I vote for the first option.

R.