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Discussion Starter · #1 ·
I have a 350 i'm trying to hook up to a Th400. My flexplate doesn't line up. Is there a diference between a TH350 and Th400 Flexplate? The one i have is the 153 tooth version. Please help, i almost had the thing running today. Thanks
 

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Sometimes the bolt pattern for the flex plates can be different between the two transmissions. I think a lot of the aftermarket, replacement flexplates will have both bolt patterns.

Steve R.
 

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You'll need the 168 tooth flywheel and the starter to go with it. I doubt GM ever used the small 153 tooth flywheel with the TH400.
I would say, for the most part, that the 153 tooth was used with the 283's, 307's, and the 168 tooth was used on the 327's, 350's and BB's.

Nate
 
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