1. dusterdemon

    dusterdemon Well-Known Member

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    What would be the correct third member for an original 71 Dodge Demon 340? Thanks Warren
     
  2. Mtrhead

    Mtrhead Ace of Spades ♠️

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    489
     
  3. Dana67Dart

    Dana67Dart Like a fine wine, only getting better with age! FABO Gold Member

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    Check the factory parts book.
     
  4. Demonracer

    Demonracer 71 Demon 00 Ram 16 Chrysler 300S 05 Caravan FABO Gold Member

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    Probably whichever number was on the shelf during assembly time. I've seen all three of the third members in unmolested cars over the years.
     
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    • 66fs

      66fs FABO Gold Member FABO Gold Member

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      Probably a 741, cone style Sure Grip, 3.23 ratio.
       
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      • Syleng1

        Syleng1 Karma is real and Life is short... FABO Gold Member

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        I agree but it all depended on what the customer orders were. But if it was a dealer stock inventory then it was 3:23ratio. I’ve seen 489 and 741 in plenty of 8-3/4 rear axles in Demon and Dusters and Darts.
         
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        • Scody21

          Scody21 Member

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          As Syleng1 and the other guys has said. at the end of the day, no one gets under the car and looks unless you have being judged on a concourse. So the better question is what are you doing with the car.. Is the 489 the best out of the 741,742,489 cases, some say so. Is the 489 more of a pain to setup if you don't put in a crush sleeve eliminator? Yes. Are you pushing more than about 600hp/TQ at the tire? if so you should be looking at a S60 or the like. 741/742/489 run them....
           
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          • oldkimmer

            oldkimmer FABO Gold Member FABO Gold Member

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            In my 70-72 A body factory 340 cars I’ve had 741 and 489 cases with 3.23/3.55/3.91 gears with cone type sure grips. Kim
             
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