42RH / A-500 in a Duster with pictures.

Transmission and Drivetrain Tech

  1. magnumdust

    magnumdust Well-Known Member

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    How difficult was it to rebuild that transmission?? I'm thinking of grabbing one at the end of the year and seeing if i could rebuild it then talk to a friend about putting it on my car.
     
  2. gdonovan

    gdonovan Well-Known Member

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    If you can do a 904 you should be able to do this but you will need a special tool and a press for the overdrive section.
     
  3. dartjack

    dartjack Well-Known Member

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    Couple of quick questions. What kind of shift improvement did you do?(brand) Did you change the 1-2 shift spring to raise it up to 2-3 rpm?
     
  4. streetdak

    streetdak Well-Known Member

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    next on the list! Great thread!
     
  5. superdart

    superdart A little misguided...

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    So is that WOT switch a hydraulic unit, or a vacuum operated unit?

    I'll get some flutter with my A-518 if I don't keep the acceleration going up past the OD kick in point. This time delay relay looks like a great idea.
     
  6. gdonovan

    gdonovan Well-Known Member

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    I did what was in the kit, generally speaking the only way to raise the shift points is by shimming the throttle valve (if I recall correct) and making custom governor weights. The weights are different than 904/727.

    Fairly sure I used a Transgo SK-TFOD-JR Shift Kit with a few other tweaks.
     
  7. gdonovan

    gdonovan Well-Known Member

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    Was vacuum, went to a mechanical switch.
     
  8. adiffrentcity

    adiffrentcity Bent Rodder

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    Were you able to configure your high speed switch for the OD?
     
  9. gdonovan

    gdonovan Well-Known Member

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    Not yet, been busy with winter stuff.
     
  10. Woods74

    Woods74 Broke Senior

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    Any updates? Ain't winter anymore!
     
  11. gdonovan

    gdonovan Well-Known Member

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    No updates yet, spent the last few weeks working on the GTX and stuff that is overdue because of a long winter.
     
  12. Woods74

    Woods74 Broke Senior

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    For those that are interested, I'd like to add this to the library:

    This ATSG video covers general build tips, common issues, and interchangeability of parts in the overdrive sections of the a500/518. Enjoy!


    [ame]http://youtu.be/6Nz_ICxyMW8[/ame]

    [ame]http://youtu.be/Sn1iw_6eq1U[/ame]

    [ame]http://youtu.be/wGa-mzdHb_k[/ame]

    [ame]http://youtu.be/R81LR8rfnT8[/ame]
     
  13. gdonovan

    gdonovan Well-Known Member

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    Brief update- Here is the part number of the speedo cable I used.

    ATP Part # Y819 which is an 80" truck cable. Please note 67 Darts have a threaded end on each end of their cable and you will have to change your speedo to 68-69 or find some sort of extension.
     
  14. SteveAle

    SteveAle Well-Known Member

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    Great info, but I have a question.

    When using a aftermarket crossmember like Hemi-Denny or Alterkation is it still needed to reinforce the hoop back in? If subframe connectors are being used and the torsion bars are not?

    Thanks, Steve
     
  15. gdonovan

    gdonovan Well-Known Member

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    If the torsion bars are not being used it would not have to be as strong in that area.
     
  16. sledger46

    sledger46 Well-Known Member

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    Question about the hobbs pressure switch. Where are you connecting it to get the pressure reading? Do you simply T it into the transmission cooler lines or are you connecting it to a test port on the A500?
     
  17. gdonovan

    gdonovan Well-Known Member

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    Governor pressure test port.
     
  18. jos51700

    jos51700 Professional Nobody

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    Who's the fella that makes the laser-cut pieces to mod the crossmember? I can't find them
     
  19. gdonovan

    gdonovan Well-Known Member

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    First I have heard of it, no idea.
     
  20. jos51700

    jos51700 Professional Nobody

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    • Like Like x 1
    • Thanks! Thanks! x 1
    • Tjfly4pay

      Tjfly4pay 1964 Valiant Conv.

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      I'm not sure if you are referring to my kit or not.
      My parts are used to convert over to the tremec T-56 MAGNUM 6 speed manual transmission. Lots of pictures and an install guide on our Facebook page at
      ToddRon Restorations. Thanks, I hope this helps. Todd
       
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      • SteveAle

        SteveAle Well-Known Member

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        Do I need to run an adaptor plate to mate the 518 to a 5.7 Hemi?

        I have seen several threads and I can not confirm for sure if this is needed. Street and Performance shows and adapter kit but I am not sure its for my setup.
         

        Attached Files:

      • salinasjoel

        salinasjoel Learning Daily

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        Will this work the same in an early a body or will I need to make my tunnel larger?
         
      • gdonovan

        gdonovan Well-Known Member

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        I have no idea, though I'm told the Gen III Hemi has the same bolt pattern as a small block mopar and just needs a flexplate which Mopar Performance sells.
         
      • gdonovan

        gdonovan Well-Known Member

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        Define "early a-body"

        67-76 should be the same, pre-67 no idea.
         
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