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#1
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440 flywheel
I have put a 73 440 in a 68 rr using the 68 383 flywheel and now have a engine vibration in the 2600-3000-range. I have been told that i must use a 73-78 440 flywheel is that correct? anybody have one they want to sell?
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#2
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What did you do with the 68 383? You can probably have the 68 flywheel balanced for your 73 440. Check the Mopar Performance bulletins, they might have a layout for drilling the flywheel.
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#3
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What you have is this:
You put the forged flywheel (internally balanced) on the cast crank (externally balanced) 440. You can tell by the balancer on the front of the motor. The cast crank balancer is almost twice the thickness of the forged crank balancer. You need the cast crank flywheel or you can have the forged crank flywheel balanced for the cast crank set up. Any competent machine shop should be able to do this for you. Either way you will need to fix the flywheel before you drive it. I do not have a new Mopar Performance catalog, but they started offering the flywheel for the 360 so you might look in the new catalog to see if they list one for the 440. |
#4
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So how can you look at a flywheel and know if it is for a forged or cast crank? I have a known forged crank, and a 4-speed compatible w/ a 68-70 b-body w/ flywheel, but not know what it came out of or even if the flywheel is from the same engine as the tranny, etc. all I have is it attached to the clutch. I'm very early in my project (I'm guessing 4 years to road-worthiness) so I'm not in a rush, but this is definitely a good thing to learn early on. Thanks!
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#5
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I was told to stay pre 71 they are all interchangable 72 and llater it is up to the model and other factors ken
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#6
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why is my dashboard shaking????
Unfortunately chrysler never offered a cast crank 440 with a standard transmission-You are in the unknown zone right now- what did you use for the pilot bushing,the crank shouldn't be drilled......To further elaborate the forged balancer is approx 1" thick the cast is almost 2". could you have possibly used a 360 flywheel on a forged crank....???? need more info to completely help.
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#7
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It´s not strictly a cast or forged crank issue. Even in the pre-cast-crank ages the six-packs and Magnum 440s where externally balanced (due to the use of the heavier rods)
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#8
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Hey Y'all,
I own a 440 six-pack and they ARE externally balanced. So are the '71-'73 "HP" 440's. The HP's and 6-packs have larger rods, weight on the flywheel and the harmonic balancer looks like the thin forged crank ones discussed above, but it has a little offset weight on it about 1/2 wide & 3 inches long going around the "front center ring" of the balancer. I would assume that torque converters for these motors have weights on them too, but I've never seen one. I thought that ALL the '73 440's were still forged cranks & 4-speed 440's (& 400's too) still had the forged crank up until '74. In any event '73/'74 is the changeover time. By the way, does anyone know if THE CRANK ITSELF is the same between the big rod & the small rod forged crank 440's? I've had one of each side by side & they LOOKED the same, but I didn't look that close or weigh the cranks. |
#9
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Hey all: Technically all Chrysler engines are "internally" balanced.
The difference comes with the cast vs. forged cranks. The forged crank has better tolerances as far as balance is concerned and that is why the balancer is the thin version. They didn't need as much weight to get it within tolerance on the forged crank. The 440+6 has a different balancer, but the thickness of the balancer is the "thin" version. They added the extra weight to make up for the heavier rods. But you can run the standard balancer on the 440+6 if the reciprocating assembly is appropriately balanced. The balancer is not the thick version use on the cast crank. The cast crank 440 uses a thicker balancer because the casting tolerances for the balance was not a good. This is why the balancer on the cast crank is a lot thicker, they needed more weight to get the crank in tolerance. Stick 440 - yes Chrysler offered a 4 speed with a cast crank. What about the trucks? They ran the 440 until '79 with the 4 speed. I have also seen '73 cars (Charger) with the cast 440 and the 4 speed. It mostly depends upon the production date of the car. Some early '73 cars have the forged crank 440, while latrer ones have the cast crank 440. To tell the difference on the flywheel: The cast 440 flywheel has machined holes in it on the back side. There are also two different diameters of holes drilled on the crank depending upon year. Napa makes a conversion pilot bushing, so you can get whatever you need for pilot from them. |
#10
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Hey Scott:
My last post explains exactly why the 440+6 motors don't have a weight on the converters. They added weight on the crank with the different balancer, but they flywheel and the converter don't need any additonal weight because they remedied on the 440+6 blancer. The cast 440 crank has a converter that has the weight on it. What we are generally reffering to is this: The 440, 440+6 up to '72 were "internally" balanced... the 440 '73 and up were "externally" balanced... Some 440's in '73 were "Internally" balanced...depends upon production date. They also did offer a cast crank 440 with a 4-speed. |
#11
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crow for lunch
I humbly apologize for any misinformation given,,,,been in the game since 82 honestly have never seen one..........
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#12
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Stick4406:
No worries!! I hope I didn't step on you toes there. |
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