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Old 11-25-2003, 01:03 PM
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flywheel usage

I have searched your forum and are unable to find any info. pertaining to my problem. I am unsure of which flywheel to use. I have a built chevy sb 350 and am trying to use a th400 transmission. Which flywheel do I use and is it weighted or non? Help me please.

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Old 11-25-2003, 01:21 PM
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There are two common ones.......

168 tooth
153 tooth

The 168 has a starter head bolt pattern that is angled.
The 153 has a starter head bolt pattern that is straight across.

Buy one to match your starter.

I prefer the 168 myself. It has more leverage

Flywheels come in the old pattern, and the later one for 86 or so models. Get one to fit your crankshaft flange.

This is a straight across pattern starter.........for the 153 tooth flywheel.

click on this for a better explanation.......

Hope this helps.........

This is one for the 168 tooth flywheel........


"I won't be wronged . I won't be insulted, and I won't be laid a hand on. "

Last edited by Deuce; 11-25-2003 at 01:18 PM.
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Old 12-03-2003, 01:09 AM
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One thing that is important to note is that the early 350 was balanced differently than the later model that has the 2-piece rear main seal. I believe that one was internally balanced and the other was externally balanced. The end of the crankshaft is different on the later model. You didn't tell us what year yours is.
The balancing question is probably why one flywheel is weighted and one is not.
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