727 46RH conversion coming

Transmission and Drivetrain Tech

  1. 67dartgtgo

    67dartgtgo FABO Gold Member FABO Gold Member

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    Hi guys,
    I've decided to do it this fall and have a rebuilt A518/46RH to replace my 727 with. Going in a 1967 Dart. I've done lots of research and will start a thread and try to do a good documentation on it when I get there.
    I'll have some questions for the smart tranny guys.
    My first one is are the 67/68 single pole 727 neutral safety switches a direct swap with the 46RH 3 pole switch? or will I have to change the rooster comb? The reverse switch is located in the console shifter in this car.
     
  2. 67dartgtgo

    67dartgtgo FABO Gold Member FABO Gold Member

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    Also can a valve body be removed while the transmission is standing on its end, tc end down on the bell, without losing anything or creating any issues or is it not recommended?
     
    Last edited: Jul 19, 2019
  3. TrailBeast

    TrailBeast Slightly Twisted Member

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    Single an 3 pole switches are not interchangable, but you might consider a neutral switch also in the console.
    I think it would be a lot simpler than changing the trans stuff.

    The valve body check balls are between the layers of the valve body and will not fall out from taking the VB off.
    The only loose thing when you pull the VB is the accumulator spring and it's real obvious.
    Yes you can pull the VB in any orientation without loosing anything.
     
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    • jas0162

      jas0162 Well-Known Member

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      Just use the hook up your neutral switch wire to the middle wire on the 3 wire terminal.
       
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      • 67dartgtgo

        67dartgtgo FABO Gold Member FABO Gold Member

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        I wondered if it were possible to just use the center pole on the neutral safety but wasn’t sure if it’s been done. I was hoping the switches were interchangeable and would just lose the back up light circuit which I wouldn’t need anyway.
         
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        • TrailBeast

          TrailBeast Slightly Twisted Member

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          You could do it that way.
          All the neutral safety function needs is a ground in neutral and park, and that's the center pole.
          Don't know why I didn't think of that the first go around.:D
           
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          • 67dartgtgo

            67dartgtgo FABO Gold Member FABO Gold Member

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            No worries at all trailbeast. I can just use the 3 pin pigtail and wire the center contact and be good to go.
             
          • 67dartgtgo

            67dartgtgo FABO Gold Member FABO Gold Member

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            How can you tell if your valve body has a shift kit installed.
             
          • TrailBeast

            TrailBeast Slightly Twisted Member

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            Some kits have a different color separator plate for the valve body, but not all.
            I modded my factory plate, so even though it has a kit it still looks bone stock.
            You might take a look at the pressure regulator valve spring adjustment.
            Compare it's position to a non kitted pressure valve adjustment, because most kits instruct to change that quite a bit.
            If you can look up some of the kit instructions and see what they say about that might be a good idea.
             
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            • HTRTrash

              HTRTrash Well-Known Member

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              Any updates?
               
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              • transman

                transman Well-Known Member

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                What kind of updates are you thinking of? There is a ton of updates done on that transmission, including a change in the overdrive planetary kit by the factory. There were issues with the early design 22.5-degree tooth pitch to the late design 15-degree tooth pitch. The early design was a weak design, hence the change by the factory.
                 
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                • kursplat

                  kursplat FABO Gold Member FABO Gold Member

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                  thinking more like, did he get it done?
                   
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                  • 67dartgtgo

                    67dartgtgo FABO Gold Member FABO Gold Member

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                    Any updates?

                    I’m getting ready to start the swap by the end of the month I think. I believe I’ve got all my parts but still get a little confused on the wiring with relays. Not my strongest suit. I may reach out to @TrailBeast for help with that as I like the way he wired his.
                    I’ve done a shift kit on the valve body, I have Hobbs pressure switches for the od/lu solenoids circuits and a vacuum interupt switch.
                    I’ve been replacing my front k member and suspension after rebuilding them so that’s taken some time. I also cut out my garbage headers and replaced them with trebligs manifolds.
                    I figure I’m not going to be driving this for a couple months anyway here in Massachusetts but have been reluctant to do the swap until the front end was done.
                    Thanks for asking and giving me motivation.
                     
                    Last edited: Jan 15, 2020 at 12:40 PM
                  • 67dartgtgo

                    67dartgtgo FABO Gold Member FABO Gold Member

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                    I’m also following @MileHighDart with his installation thread and am really looking forward to seeing his finished. Some outstanding work there.
                     
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