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#1
02-16-2024, 06:43 PM
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Flexplate differences
I need to buy a flexplate for a 400 crank. How do I know which one? There is an earlier one and a later one. The hole in the middle is bigger? What year was the change or what casting numbers?
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#2
02-16-2024, 08:34 PM
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Measure the crank register for the hole in the middle . Will be 2.5 or 2.75.
Then there are "internal balance" if a shop did it possibly or the factory "external balance" that has one hole missing.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
02-16-2024, 09:44 PM
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I have a brand new on
In the box,yours for shipping cost.PM me.Tom |
| The Following User Says Thank You to tom s For This Useful Post: | ||
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#4
02-16-2024, 11:21 PM
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Also early ones only have 3 converter holes. Later ones have 6 holes. Early torque converters have mounting hole farther out from the center. The ones with 6 holes will fit everything though later converters had metric bolts and the holes will have to be enlarged slightly.
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#5
02-17-2024, 04:58 AM
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| The Following User Says Thank You to Kenth For This Useful Post: | ||
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#6
02-19-2024, 09:28 AM
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I found out about this the wrong way while doing a 400 install on a friends car. Of course we had the wrong flexplate and had to rush ship another one to finish the job except I had to fly home and couldn't stick around for the first drive.
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