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1973 440/727 Torque Converter
#1566322
01/21/14 10:49 AM
01/21/14 10:49 AM
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Joined: Oct 2005
Posts: 173
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RoadRunner73
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OP
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I bought a 440 and 727 at Carlise this past year and the Tranny is in the shop getting worked over now. Got a call back from them because the torque converter didn't have any balancers on it which from what I'm finding can't be right for the engine and tranny... looking to figure out what crank I have in the engine to really solve the problem, whats the best way (besides ripping it apart) to find this out? The engine is going to be rebuilt soon but going to stay pretty well stock...
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1973 Plymouth Road Runner
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Re: 1973 440/727 Torque Converter
[Re: RoadRunner73]
#1566324
01/21/14 10:56 AM
01/21/14 10:56 AM
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Joined: Jan 2003
Posts: 1,792
Greer, SC
TooMany62s
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Greer, SC
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Normally if you have a thick balancer like the one on the left it's a cast crank. If you have a thin balancer like the one on the right you have a forged crank. Of course that assumes the motor has the right balancer on it.
Last edited by TooMany62s; 01/21/14 10:58 AM.
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Re: 1973 440/727 Torque Converter
[Re: Dan Halen]
#1566326
01/21/14 11:38 AM
01/21/14 11:38 AM
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Joined: Aug 2007
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Valencia, España
NachoRT74
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Valencia, España
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if we trust on what factory should do... 73 440 autos should be cast so you'll need counterweights on TC
73 440 manuals got forged
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 1973 440/727 Torque Converter
[Re: NachoRT74]
#1566327
01/21/14 11:41 AM
01/21/14 11:41 AM
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RoadRunner73
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I've seen this but I've also seen variation. The other thing is I dont know if this engines been taken apart and if anything has been changed on it or not.
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1973 Plymouth Road Runner
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Re: 1973 440/727 Torque Converter
[Re: Dan Halen]
#1566329
01/21/14 04:24 PM
01/21/14 04:24 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
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Quote:
Pull the pan and look for the parting line on the crank. A thin line indicates a cast crank, thicker line is forged which would have no weights on the converter.
Yep...
I.D. the crank POSITIVELY, and go from there...
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Re: 1973 440/727 Torque Converter
[Re: Polarapete]
#1566333
01/21/14 10:27 PM
01/21/14 10:27 PM
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bc
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bc
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Re: 1973 440/727 Torque Converter
[Re: Yellow Fever]
#1566336
01/21/14 11:29 PM
01/21/14 11:29 PM
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RoadRunner73
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I'll have to look its in storage
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1973 Plymouth Road Runner
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Re: 1973 440/727 Torque Converter
[Re: RoadRunner73]
#1566338
01/22/14 04:20 PM
01/22/14 04:20 PM
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Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
John_Kunkel
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'73 was the first year of the cast 440 crank, all 440HP were supposed to have forged but standard 440 could have either cast or forged at random.
The INTERNET, the MISinformation superhighway
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Re: 1973 440/727 Torque Converter
[Re: John_Kunkel]
#1566339
01/22/14 07:35 PM
01/22/14 07:35 PM
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Joined: May 2003
Posts: 1,751
Graham, WA
Polarapete
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One thing that we are all overlooking in this thread is that the OP said he bought the engine and trans @ Carlisle swap meet. Now if it was an OEM assembly (ran well from the factory and had never been apart) then the fact that it had a converter with no balance weights would indicate a forged crank. At any rate, the transmission is being rebuilt and some time down the road the engine will be rebuilt. So continue with the transmission rebuild, rebuild the motor and put them together with a compatible converter whether it be the original or a replacement and you will be happy.
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction
1998 Ram 2500 QuadCab, new daily driver.
2008 Honda Element
2014 Carry-On 7x14 Cargo Trailer
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Re: 1973 440/727 Torque Converter
[Re: Yellow Fever]
#1566340
01/22/14 09:33 PM
01/22/14 09:33 PM
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Joined: Jan 2013
Posts: 167
maryland
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maryland
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forged crank = neutral balanced flex plate, neutral torque converer, neutral balancer cast crank = offset balancer, and then stock was a neutral flex plate and wheighted torque converter in order to use a neutral (easy to buy) torque converter when using a cast crank setup, many use a B&M flex plate that has a bite out of it. so you can use cast crank , your offset balancer in the front, your offset B&M flex plate and a neutral torque converter  note: you would not use a wheighted torque converter and an offset flexplate together. it's one or the other with a cast crank, not both
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of course the OEM cast models are smaller, lighter and cleaner looking than the OEM forged units and because of that they require external balancing. Now the spendy aftermarket forged pieces are a lot nicer, but they are also at least 40 years newer. Build your motor around the crank and you won't go wrong 
could throw together a long block with a "Krylon" rebuild and and tout it as something special. But, none of us would do such a thing 
