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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

240 I6 trans guidance

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Old May 28, 2026 | 04:49 PM
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CMiller122821's Avatar
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240 I6 trans guidance

Sorry in advance for my lack of knowledge. I inherited a 72 f100 with a 240 I6 and a 3 on the tree. its been sitting for 20 ish years. everything I know about these trucks i had to learn to get this one running so I am very new to this. I have been driving it for about a year now and am interested in swapping it over to an automatic trans. I have no idea what im looking for and there seems to be a lot of options out there. I would appreciate some advice or some nudges in the right direction.

 
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Old May 28, 2026 | 09:27 PM
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You will need a small block Ford V-8 pattern C-4 AT and flex plate. You won't need a c-6 as that would be overkill. Best bet is to find a AT equipped truck as you will need a lot of little pets to finish it. You can buy a C-4 first.
 
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Old May 29, 2026 | 07:45 AM
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Agreed, find a junkyard truck for all the parts, like the flex plate and flywheel bolts, and the radiator and trans shift and kickdown linkage.
I'd look for a rebuilt C4 or rebuild the one you find at the junkyard
 
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Old May 29, 2026 | 08:26 PM
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Thank you so much! I am sure i will have more questions but this points me in the right direction.
 
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