Which torque converter for 904 and 360 magnum

Magnum Engine Swaps

  1. StimsonGarage

    StimsonGarage Well-Known Member

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    hey guys so I’m a little stumped. I have a stock 1996 360 magnum with the correct harmonic balancer and correct flexplate that came with engine. I understand I need a neutral balanced torque convert(with out weight) was hoping somebody could tell me which one I needed maybe even a part number too! It’s going into a 904 as well. Thank you guys
     
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    • j par

      j par Well-hung Member

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      :popcorn:I'm curious as well, I may be doing this same combination...
       
    • TrailBeast

      TrailBeast Slightly Twisted Member

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      After slightly egging one of the converter bolt holes in the Magnum flex plate the stock neutral balanced converter that is for a 318/904 works perfect.
      This also means any standard high stall 318/904 converter will also.

      The 5.9 having more hp and torque will cause a little higher than advertised stall.
       
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      • Locomotion

        Locomotion Well-Known Member

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        Gotta know if it's a lock-up or not. Stuff doesn't interchange.
         
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        • TrailBeast

          TrailBeast Slightly Twisted Member

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          One would hope he would have mentioned that, but who knows.:D
           
        • StimsonGarage

          StimsonGarage Well-Known Member

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          I appreciate the help so I might be able to shed more light https://www.summitracing.com/parts/HUP-27-20 that’s the torque converter I have right now. I noticed on summit it says it’s BALANCED so would this be no go. I was also thinking my 318 la which is the engine I’m removing is internally balanced wouldn’t a balanced tq be an issue. I don’t know why I didn’t do more research before I bought it lol.
           
        • MRGTX

          MRGTX Well-Known Member

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          I went with a TCI Streetfighter 2600 stall with my Magnum/904 combo.

          Looking back at my order history, it lists the part as:
          "904-988 Breakaway Torque Converter 72-80"

          It has been working great...I hope that helps!
           
        • TrailBeast

          TrailBeast Slightly Twisted Member

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          There are two kinds of balanced.
          One is a normal assembly balance that usually uses small thin plates of steel welded to the outer perimeter of the converter.
          The other is an engine balance weight that it usually about 1/4 inch thick and welded to the engine side of the converter.
          Those can be cut off to produce a neutral balanced converter.

          If you have a converter for a 318 it is very likely a neutral balanced and can be used with the flex plate of the 5.9 as the 5.9 flex plate has the balancing weights that the engine requires welded to it.
           
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          • 318willrun

            318willrun Stomper 4x4... we kept energizer in business

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            410 getting weak?
             
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            • j par

              j par Well-hung Member

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              After 4 years of drag racing the crap out of it and spirited driving I have an over 20 lb per cylinder increase in compression!!!

              I'll probably go with a magnum motor in my 41 Studebaker. I know I can hook a 904 up to it easily. I may try overdrive but I know the 904 would be a no-brainer for me...
              But I'm not trying to talk about my car I'm trying to learn on this one...
               
              Last edited: Jul 12, 2019 at 10:55 AM
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              • StimsonGarage

                StimsonGarage Well-Known Member

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                Ok cool thank you so much. I see no weights on the Hughes converter I own so I’m assuming it is neutral even though summit says balanced.
                 
              • mopar65

                mopar65 Well-Known Member

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                I am using a Coan 8 inch 5600 stall converter in the 904 that I have hooked up to my magnum 360 engine,
                 
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