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

Transmission and Drivetrain Tech

  1. gdonovan

    gdonovan Well-Known Member

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    The bellcrank MAY crash into the overdrive housing, it is much larger than the original units tailshaft. Some people have got it to work with extensive rework, welding and grinding but in that case was an e-body.

    Gary
     
  2. gdonovan

    gdonovan Well-Known Member

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    E-body install, note the twisted angle of the bellcrank and this was after a big rib was cut out of the case.

    A518 Overdrive Questions
     
    Last edited: Sep 4, 2018
  3. moparmat2000

    moparmat2000 FABO Gold Member FABO Gold Member

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    Still researching a 42RH for my sons 69 barracuda. I have a list of what i need to install this trans, only hang up question i got left is what everybodys using for a kickdown linkage? Should i use a push-pull cable type arrangement from summit? This will allow the use of a taller intake later on. I have an eddy streetmaster i just got (thanks txstang84) or should i use a stock A904 arrangement. Only vehicles i can find the A904 V8 kickdown are late 70s volare /aspen. Not sure if that will work with A body.
     
  4. mopardemon340

    mopardemon340 Well-Known Member

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    I looked into this all to and forgot if its an automatic or a mechanical kickdown.. But if you need a mechanical lockdown go with a lokar you will be very happy with it.
     
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    • 89on35s

      89on35s Inferno Red Duster FABO Gold Member

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      I used Lokar for my A-500 Duster install. It worked great and you could use any intake combo.

      Cley
       
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      • MileHighDart

        MileHighDart Well-Known Member

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        Something I didn't see mentioned in this thread, unless I missed it.

        Will my 904 driveshaft yoke plug into the A500?
         
      • 89on35s

        89on35s Inferno Red Duster FABO Gold Member

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        No. You need a 727 yoke. At least my A500 did.

        Cley
         
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        • 67Dart273

          67Dart273 FABO Gold Member FABO Gold Member

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          ^^I thought the newer transmissions were different spline that the older ones?^^
           
        • 89on35s

          89on35s Inferno Red Duster FABO Gold Member

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          Mine was from a 91 truck and it took a slip yoke from a 727.

          Cley
           
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          • Cuprum-74

            Cuprum-74 Moparus Fanaticus

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            Well look what I finally decided to start on.
            20190828_100309.jpg 20190828_102931.jpg 20190828_103205.jpg 20190828_104109.jpg 20190828_104144.jpg 20190828_105712.jpg 20190828_115746.jpg 20190828_115803.jpg 20190828_115712.jpg
             
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            • MileHighDart

              MileHighDart Well-Known Member

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              Looks like my workbench right now.
              But I think I lucked out, mine was super clean on the inside. Hardly a speck of anything in the pan. Nothing on the magnet.

              IMG_20190804_113248752.jpg

              IMG_20190804_113255794.jpg
               
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              • Cuprum-74

                Cuprum-74 Moparus Fanaticus

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                The funny thing is all the clutches and bands don't look burnt so far.
                But then again I haven't tore in the Overdrive section yet. Somethings burnt though, because i can smell it.
                 
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                • Cuprum-74

                  Cuprum-74 Moparus Fanaticus

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                  So I've been looking at 26 spline Torque Converters for these trasnmissions.
                  Since it has the lockup. (May or may not convert to non-LU).
                  The stall rating selections for the 26 spline is extremely limited, all I can find is up to 2500. Is there any place I can get a stall rating higher than 2500 for the 26 spline lock-ups?
                   
                • moparmat2000

                  moparmat2000 FABO Gold Member FABO Gold Member

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                  What years of Van's and pickups will have a 42RH in them? I have been told only 89-91 I will find a 42RH. After that they are a 42RE.
                   
                • Jadaharabi

                  Jadaharabi FABO Gold Member FABO Gold Member

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                  I thought 96 was the switch over year.
                   
                • Cuprum-74

                  Cuprum-74 Moparus Fanaticus

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                  My A500/42RH is from a 92 dakota, so I know they went past 91, I believe Jadaharabi is right 96 was the year they switched.
                   
                • moparmat2000

                  moparmat2000 FABO Gold Member FABO Gold Member

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                  Ok, cool, it widens my search then. Want a 42RH over a 46RH. Lower ratio 1st gear than the 46 will work great with a mild 318 and 3.73 rear gears, plus its smaller and lighter, and can be built to be just as tough as a 46RH.

                  Is it more common to find a 42RH behind only a V6 truck engine? Or were they behind V8s too.
                   
                • MileHighDart

                  MileHighDart Well-Known Member

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                  I believe they were also used behind 5.2 magnums.
                   
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                  • moparmat2000

                    moparmat2000 FABO Gold Member FABO Gold Member

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                    I might be able to get a 46RH. Not my first choice. Up to what year did the do the 46RH? I have a friend with I think a 99 or 01 full size ram. Truck was hit pretty hard in the front.
                     
                  • Jadaharabi

                    Jadaharabi FABO Gold Member FABO Gold Member

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                    Once agin 1996 was the change over year for both the 42 and the 46.
                     
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                    • moparmat2000

                      moparmat2000 FABO Gold Member FABO Gold Member

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                      I am curious because your duster is the same wheelbase as the 69 barracuda I will be eventually putting a 42RH or 46RH trans in. What length did you have the driveshaft shortened to? I am using a ford 8.8 rear axle. Not sure how much of a difference that the ford rear makes on the length.
                       
                      Last edited: Oct 5, 2019
                    • moparmat2000

                      moparmat2000 FABO Gold Member FABO Gold Member

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                      Got a 42RH out of a V6 dakota. I noticed its flexplate has a bunch of lightening holes punched in the flexplate at one spot to lighten it. Also saw in rockauto that it's a different PN than the 1993 318 one which lists without balance weight.

                      Am I right to assume that because it's an odd fire V6 that the flexplate wont work with a neutral balance 1974 318, and that I should just get the neutral balance flexplate for the 318 or 360 from rockauto.

                      This leads to the next question. The first neutral balance V8 flexplate pic has a tone ring for a hall effect pickup. I will not be using that, and would prefer to use the cheaper flex plate without the hall effect ring built into it. Can the one in pic #2 be used on the 42RH torque converter?

                      Screenshot_20191010-115803_Samsung Internet.jpg

                      Screenshot_20191010-115730_Samsung Internet.jpg
                       
                      Last edited: Oct 10, 2019
                    • plumkrazee70

                      plumkrazee70 Well-Known Member

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                      Youre gonna want the flexplate in pic #2. That should be the one you want.
                       
                    • moparmat2000

                      moparmat2000 FABO Gold Member FABO Gold Member

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                      And that one will line up with the bolt circle on the 42RH lockup converter ?
                       
                    • plumkrazee70

                      plumkrazee70 Well-Known Member

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                      I am not 100% sure, but that looks identical to my 340 flexplate and from my research it will bolt to the 42rh converter, with a little rounding on one hole.
                       
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