Which flywheel do I need?
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New User
Joined: Feb 2010
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From: Florence, MS
Which flywheel do I need?
I just bought a 300 inline six that had been hooked up to a manual transmission. I have now bought a C-4 transmission and was needing to know which flywheel I need to buy to fit it? Could someone please help me out with this. Thanks.
Cargo Master
Joined: Oct 2005
Posts: 2,084
Likes: 94
From: Stanton, Michigan, USA
It's my understanding that a flywheel is used with the manual transmission, whereas a flexplate is used with an automatic transmission.
So, if I'm understanding you correctly, you're looking for a FLEXPLATE (and required spacer ring) that will allow you to properly bolt up your 300" straight 6-cylinder engine and will engage with your C-4 automatic transmission, correct? I will assume you've confirmed that the C4 transmission has the correct bellhousing bolt pattern to bolt up to your 300" 6-cylinder. I'm not an expert, but I do know some C4's came with different bellhousing bolt patterns.
I'm not positive, but if I recall correctly, the 240" 6-cyl and the 300" 6-cyl engines use a starter ring gear that is the same diameter and tooth count.
So, I think you're looking for a flexplate from a '64-'72(+?) 240" or 300" E100, F100 or F250 that had a C4 automatic transmission.
I don't know what the correct starter ring diameter size or tooth count is though......
-- sorry.
BarnieTrk
So, if I'm understanding you correctly, you're looking for a FLEXPLATE (and required spacer ring) that will allow you to properly bolt up your 300" straight 6-cylinder engine and will engage with your C-4 automatic transmission, correct? I will assume you've confirmed that the C4 transmission has the correct bellhousing bolt pattern to bolt up to your 300" 6-cylinder. I'm not an expert, but I do know some C4's came with different bellhousing bolt patterns.
I'm not positive, but if I recall correctly, the 240" 6-cyl and the 300" 6-cyl engines use a starter ring gear that is the same diameter and tooth count.
So, I think you're looking for a flexplate from a '64-'72(+?) 240" or 300" E100, F100 or F250 that had a C4 automatic transmission.
I don't know what the correct starter ring diameter size or tooth count is though......
-- sorry. BarnieTrk
Cargo Master
Joined: Oct 2005
Posts: 2,084
Likes: 94
From: Stanton, Michigan, USA
Yep, 312 is correct... the cone section of the starter is a different length for an automatic versus a manual....
Might just be easier to exchange/replace the entire starter, unless you have access to both...if so, then you could switch the cone sections. If you do want to switch cone sections, make sure the armature bushing is in good shape and a smear of a greasy finger inside it would be a good thing....
BarnieTrk
Might just be easier to exchange/replace the entire starter, unless you have access to both...if so, then you could switch the cone sections. If you do want to switch cone sections, make sure the armature bushing is in good shape and a smear of a greasy finger inside it would be a good thing....
BarnieTrk
Post Fiend
Joined: Nov 2000
Posts: 6,060
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From: Glendale Arizona
The pilot bushing needs to be removed so the crank can accept the pilot on the converter. The converter is machined to fit in to the bare crank.
All fords nomenclature for flywheels include standard and automatic. All the service manuals refer to flywheel and do not call out a flex plate. .
In GM terms it differs flex plate for a auto, flywheel for a manual.
Garbz
All fords nomenclature for flywheels include standard and automatic. All the service manuals refer to flywheel and do not call out a flex plate. .
In GM terms it differs flex plate for a auto, flywheel for a manual.
Garbz
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Cargo Master
Joined: Oct 2005
Posts: 2,084
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From: Stanton, Michigan, USA
Interesting.... I didn't know that either.
Thanks for setting me straight as well, Garbz!
BarnieTrk
Post Fiend
Joined: Nov 2000
Posts: 6,060
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From: Glendale Arizona
Its one of those things like stepside or high boy....
The spacer ring is in increments to shim the flywheel typically .010, .015, and so on it is to set the teeth in relation to the starter. Some times it is necessary some times it is not.
FEs also use a ring on the side facing the clutch as a reinforcement for the flywheel in an automatic application. That one is about .060. or a 1/16 inch.
Garbz
The spacer ring is in increments to shim the flywheel typically .010, .015, and so on it is to set the teeth in relation to the starter. Some times it is necessary some times it is not.
FEs also use a ring on the side facing the clutch as a reinforcement for the flywheel in an automatic application. That one is about .060. or a 1/16 inch.
Garbz
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