manual trans with 5.9 magnum

Manual Transmission & Clutch Discussions

  1. duster george

    duster george Member

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    need help have 5.9 mag out of 98 dodge 4x4 have complete truck .putting it. n 71 duster was slant 6 3 speed on floor .what trans needed just a cruiser .would like to keep efi stock from truck if possible
     
  2. RustyRatRod

    RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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    Put the three speed behind it.
     
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    • DionR

      DionR Well-Known Member

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      If you want to keep the EFI and the manual trans, you will need an aftermarket flywheel. The flywheel has the crank tone ring notches the PCM uses to know the crank rotation and the stock Magnum flywheel is too large for a car bellhousing. I know of one guy that had one turned down to fit the car starter ring, but seems hit and miss as to getting a shop to do this.

      You will also need a different bellhousing to bolt up to your 3 speed. This bellhousing will require a notch to be added for the crank position sensor as well.

      In the end, it might be easier all around to find a small block 904/727 and use that if all you want is a cruiser. Unless you really want to use a stick.
       
    • dodge71demon

      dodge71demon Well-Known Member

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      change the manifold and use either the fitech or sniper efi or use an automatic either way IMO your opening a can of worms remember the balance on the magnum is different than any thing else
       
    • RustyRatRod

      RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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      Whatever happened to real hot rodding? Yeah, just give up. That's the answer.
       
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      • dodge71demon

        dodge71demon Well-Known Member

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        If your replying to my response I'll be nice I've probably done more HOT RODDING than most people on this site
         
      • RustyRatRod

        RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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        Not replying to any response in general. Just the general attitude of giving up an idea because it's "too hard".
         
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        • Syleng1

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

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          :popcorn::popcorn::popcorn:
           
        • TT5.9mag

          TT5.9mag Two atmospheres are better than one

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          If you want to keep the original efi the only real option is to use a Bellhousing and flywheel from a manual trans equipped Dakota or Ram. The Dakota was offered with an AX15 5 speed trans behind a 3.9 v6 and the Ram had the nv3500/4500 5 speeds. It is possible to find the stuff on eBay occasionally if this is the route you want to go.
           
        • duster george

          duster george Member

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          would a Dakota 4.7 with manual work its 2003 I think
           
        • TT5.9mag

          TT5.9mag Two atmospheres are better than one

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          Don’t quote me because I have no first hand knowledge of the 4.7 but I think the Bellhousing bolt patterns are different.
           
        • duster george

          duster george Member

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          what's benefits of 904/727 verse stock 2wd drive truck trans ? are they smaller?
           
        • Tooljunkie

          Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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          Think i would transplant a 4.7. They run pretty strong. And Less money to maintain than a 5.7 hemi.
          I have a 360 magnum /manual i was considering putting in my barracuda. I have been wrenching all my life, and after researching it i thought different.
          Good luck whatever path you choose, interested in seeing the build.
           
        • dartslantsix

          dartslantsix Well-Known Member

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          I'm using an AX15 in my car behind a 5.2L with stock injection. It's been fine, but did require substantial tunnel mods. The torsion bar cross member had to be opened up and the sheetmetal redone. Details are on my blog www.dartslantsix.wordpress.com
           
        • GREEN DART 5

          GREEN DART 5 Well-Known Member

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          I think American Powertrain still makes a flywheel that will work with the ignition trigger. Part number FWCH-10004CS. Then it’s a small cut/notch in the bellhousing and mount the trigger. This was for a 4 speed.....the cost of the flywheel with my laziness lead me to put a carburetor on.....Good luck with your build!!!!!
           
        • 67Dart273

          67Dart273 FABO Gold Member FABO Gold Member

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          On top of the other problems, "duster george", was this an automatic or stick originally? My old gas 5.9 2500 HAD NO PILOT DRILLING with an automatic. You would have to either have the crank machined for a pilot, or hand drill a clearance hole for the pilot shaft, then use the large diameter pilot bearing/ fits in the pilot hole.

          There has GOT to be a way to trigger that thing, even if you have to build your own trigger wheel, either at the front or rear of engine.

          So far as balance, don't know. Surely the aftermarket makes 5.9 flywheels for pass. car bells. (130? tooth)
           
        • sireland67

          sireland67 FABO Gold Member FABO Gold Member

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          My 5.9 was drilled for a pilot bearing.
          McLeod sells a 130 tooth flywheel that takes a bolt on weight for the mag balance.
          As far a FI not sure, I ran a carb on mine.
           
        • duster george

          duster george Member

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          what bellhousing and trans u use
           
        • sireland67

          sireland67 FABO Gold Member FABO Gold Member

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          I have done it twice.
          Stock bellhousing 833 trans (car)
          Stock bellhousing NP435 trans (truck)

          Both times used stock type flywheel from McLeod with bolt on weight.
           
        • MRGTX

          MRGTX Well-Known Member

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          Why are some drilled and some not? Is it only Magnums that were installed at the factory with a manual transmission that are drilled? How about Mopar crate engines?
           
          Last edited: Jan 23, 2020
        • sireland67

          sireland67 FABO Gold Member FABO Gold Member

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          I don’t know why.
          Right now I have two 1972 340’s both with a cast crank, one is drilled and the other one is not.
           
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          • Idaho

            Idaho FABO Gold Member FABO Gold Member

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            The flywheel for a 5.9 will cost around $350 IIRC.
            I’m doing this with an A833 OD.
            Bought the flywheel then decided to make it a stroker (internally balanced) so will be selling the flywheel.
             
          • TripleL

            TripleL Well-Known Member

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            $$$$$!!
             
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