Are all fly wheels the same ?

[Kids first car]

Can anyone tell me if the 383 and the 440 fly wheels are the same?? thanks:torn:

 

[Basketcase]

I know there is a 10 1/2" and an 11". I THINK the number of teeth are the same. You might check in the Factory Service Manual in our tech section...all we have is the '69 model year (this started as a '69 site)

 

[mahoney0_00_3]

the flywheel is the same just the clutch+ pressure plate is different 10 1/2 and 11 in 66 to 69 fit 70 to 74 fit

 

[mcmopar]

The '69 383 used an 11" flywhell while the 440 used a 10.5". They aren't the same. I know because back in '03 I purchased what I thought was the right flywheel for my 11" clutch. Guess what? I got a 10.5" flywheel (Centerforce billet steel SFI approved) and the 11" clutch did not bolt up correctly. So I had to spend some extra $$$ and get an 11" flywheel.

 

[moparmonk]

What are the differences to look for when comparing the two? Is the diameter the usable surface or the complete outside distance across the face?

 

[ACME A12]

Monk:

Some of what has been posted above is not quite accurate...the diameter difference is based upon the year - NOT the displacement. How to spot the visible difference? - Count the teeth.

'68 383/440: 11" flywheel with 143 teeth. Used bellhousing casting #2892262

'69 383/440: 11" flywheel with 143 teeth. Used bellhousing casting #2892626

'70 - '72 383/440: 10.5" flywheel with 130 teeth. Used bellhousing casting #2892513

All use the 4.805" bearing retainer diameter. No idea what the difference is between the '68 & '69 bellhousing castings. Never had a '68. Probably nothing.


One other thing to mention - just in case - is that a 440 with the big rods (commonly referred to as six pack rods) never came with an 11" clutch. '69 A12s did not have big rods - these came out in '70. SO, if you use a big rods with an 11" clutch/flywheel there is a teeny, tiny weight that should be added to the flywheel. I know because I am running this combination. '70 big rod 440 mated to my original 11" flywheel.

 

[arcticmopar]

Monk:

Some of what has been posted above is not quite accurate...the diameter difference is based upon the year - NOT the displacement. How to spot the visible difference? - Count the teeth.

'68 383/440: 11" flywheel with 143 teeth. Used bellhousing casting #2892262

'69 383/440: 11" flywheel with 143 teeth. Used bellhousing casting #2892626

'70 - '72 383/440: 10.5" flywheel with 130 teeth. Used bellhousing casting #2892513

All use the 4.805" bearing retainer diameter. No idea what the difference is between the '68 & '69 bellhousing castings. Never had a '68. Probably nothing.


One other thing to mention - just in case - is that a 440 with the big rods (commonly referred to as six pack rods) never came with an 11" clutch. '69 A12s did not have big rods - these came out in '70. SO, if you use a big rods with an 11" clutch/flywheel there is a teeny, tiny weight that should be added to the flywheel. I know because I am running this combination. '70 big rod 440 mated to my original 11" flywheel.

I know this is an old thread, but it popped up during a search.

The only difference between the ‘68 - #262 and the ‘69 - #626 11” bellhousings is the #626 housing will accept either a 4-speed or 3-speed, where the #262 is only drilled to accept the 4-speed.

Also, ALL the ‘70-72 440 HP motors will have the heavier “six pack” rods and require the externally balanced 10.5” flywheel (OEM) for the #513 housing as well. As noted earlier, if using the 11” setup with this motor, you will need to either find an aftermarket flywheel or have an 11” custom balanced. Although I will say I have yet to find an aftermarket 11“ flywheel (143 teeth) externally balanced for use with the ‘70+ 440HP motor and the #262/626 bellhousing combination.