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360 Magnum balancing ? #844118
11/02/10 08:39 AM
11/02/10 08:39 AM
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prodak87 Offline OP
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I have a 360 Magnum that I got from a wrecked 99 Dakota R/T . I want to hook it up to a 904 tranny. I know the balance is different than the LA 360 . My question is What weights do I use and where can I get them? and is the weight the same if I use a 727 trans.

Re: 360 Magnum balancing ? [Re: prodak87] #844119
11/02/10 09:59 AM
11/02/10 09:59 AM
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Andrewh Offline
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for the 727, I know it uses a neutral balanced torque converter and a balanced flex plate. B&M makes/made a specific flex plate for this.
not sure if they have one for the 904.

Re: 360 Magnum balancing ? [Re: Andrewh] #844120
11/02/10 12:00 PM
11/02/10 12:00 PM
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HotRodDave Offline
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Just use the flex plate from the R/T it already has the weight on it for the magnum. If you do that be sure to knock off the 360 weight on the converter. You may have to elongate one bolt hole but it works great.


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Re: 360 Magnum balancing ? [Re: HotRodDave] #844121
11/02/10 12:19 PM
11/02/10 12:19 PM
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Grand Haven, MI
patrick Offline
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Quote:

Just use the flex plate from the R/T it already has the weight on it for the magnum. If you do that be sure to knock off the 360 weight on the converter. You may have to elongate one bolt hole but it works great.




but wasn't the magnum 360 only available with 727 based trannies? (46RH/RE)?


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: 360 Magnum balancing ? [Re: patrick] #844122
11/02/10 12:53 PM
11/02/10 12:53 PM
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Branson, Mo.
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joedust451 Offline
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Quote:

Quote:

Just use the flex plate from the R/T it already has the weight on it for the magnum. If you do that be sure to knock off the 360 weight on the converter. You may have to elongate one bolt hole but it works great.




but wasn't the magnum 360 only available with 727 based trannies? (46RH/RE)?




No, i have mine hooked up to a 904, i just used the 360 magnum flexplate with the weights, just longate one of the holes & its a fit.


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: 360 Magnum balancing ? [Re: joedust451] #844123
11/02/10 01:31 PM
11/02/10 01:31 PM
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Grand Haven, MI
patrick Offline
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Quote:

Quote:

Quote:

Just use the flex plate from the R/T it already has the weight on it for the magnum. If you do that be sure to knock off the 360 weight on the converter. You may have to elongate one bolt hole but it works great.




but wasn't the magnum 360 only available with 727 based trannies? (46RH/RE)?




No, i have mine hooked up to a 904, i just used the 360 magnum flexplate with the weights, just longate one of the holes & its a fit.




so the OEM weighted flexplate will work with a 904 or 727?


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: 360 Magnum balancing ? [Re: patrick] #844124
11/02/10 01:46 PM
11/02/10 01:46 PM
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Andrewh Offline
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well, one of the bolt holes doesn't line up. you have to slot it out so it will bolt up.

I have not run one like that, but sounds like others have.

Re: 360 Magnum balancing ? [Re: patrick] #844125
11/02/10 04:40 PM
11/02/10 04:40 PM
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joedust451 Offline
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Quote:

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Quote:

Quote:



so the OEM weighted flexplate will work with a 904 or 727?




Yep, speaking for the 904 anyway, i'm sure the 727 would be the same, some magnums came with the weights on the converter, just need the ones that had the weights on the flexplate.


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: 360 Magnum balancing ? [Re: joedust451] #844126
11/02/10 05:39 PM
11/02/10 05:39 PM
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Grand Haven, MI
patrick Offline
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Quote:

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Quote:

Quote:

Quote:



so the OEM weighted flexplate will work with a 904 or 727?




Yep, speaking for the 904 anyway, i'm sure the 727 would be the same, some magnums came with the weights on the converter, just need the ones that had the weights on the flexplate.




but what I'm saying is the 360 mag was never available behind a 904 based tranny (42RH/RE), and I _thought_ the bolt circle on a 904's converter is a smaller diameter than a 727's converter.....if it's not, B&M makes a magnum weighted flexplate for a 727


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: 360 Magnum balancing ? [Re: patrick] #844127
11/02/10 05:54 PM
11/02/10 05:54 PM
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joedust451 Offline
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Quote:

Quote:

Quote:

Quote:

Quote:

Quote:



so the OEM weighted flexplate will work with a 904 or 727?




Yep, speaking for the 904 anyway, i'm sure the 727 would be the same, some magnums came with the weights on the converter, just need the ones that had the weights on the flexplate.




but what I'm saying is the 360 mag was never available behind a 904 based tranny (42RH/RE), and I _thought_ the bolt circle on a 904's converter is a smaller diameter than a 727's converter.....if it's not, B&M makes a magnum weighted flexplate for a 727




For whatever its worth, I'm not sure what tranny was behind this 360 magnum flexplate, but not only did my "stock" 904 converter bolt up to it, so did the PTC i bought, another thing i did (& it worked out great) is open up the flexplate holes to except the 7/16" bolts, I don't know what to tell you, other then you "CAN" bolt up a 904 converter, & B&M no longer makes the flexplate for the 904/360 magnum conversion.


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: 360 Magnum balancing ? [Re: joedust451] #844128
11/02/10 07:39 PM
11/02/10 07:39 PM
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Oakdale CT
gdonovan Offline
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Re: 360 Magnum balancing ? [Re: gdonovan] #844129
11/03/10 08:44 AM
11/03/10 08:44 AM
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Grand Haven, MI
patrick Offline
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good info gdonovan!


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: 360 Magnum balancing ? [Re: patrick] #844130
11/03/10 09:52 PM
11/03/10 09:52 PM
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Oakdale CT
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good info gdonovan!




Your welcome!

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