Flywheel Numbers

[Robert Willis]

A friend is looking to see if this wheel is for a 454 or a 400 engine. The numbers he gave me are, 3873457N and a code of J19.

Thanks in advance. Bob

[Joe L.]

Re: Flywheel Numbers

Bob------

I can't find any reference to a GM casting #3873457N flywheel. However, GM casting #3993457N is a Mark IV 454 14" nodular iron flywheel. I suspect that he may be reading the casting numbers incorrectly. That's very easy to do with casting numbers, especially those on flywheels.

[Joe L.]

Re: Flywheel Numbers

Bob------

I can't find any reference to a GM casting #3873457N flywheel. However, GM casting #3993457N is a Mark IV 454 14" nodular iron flywheel. I suspect that he may be reading the casting numbers incorrectly. That's very easy to do with casting numbers, especially those on flywheels.

[Robert Willis]

Re: Flywheel Numbers

Thank You.

Bob

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