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Trans. ID???

Discussion in 'Dodge Ram' started by MoparsOnly, Jul 6, 2019.

  1. MoparsOnly

    MoparsOnlyIt's great to be young and insane

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    Hey Yall, Just got a 1990 w-150. I believe it's a late 89 since thats what the door reads. In the cab on the dash It has an OD on/off button. What makes me think early 500 trans. I'm just not sure. Any Help would be appreciated.
     
  2. 65 sporty

    65 sportyWell-Known Member

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  3. MoparsOnly

    MoparsOnlyIt's great to be young and insane

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    By the looks of it from your link It could be either 500 or 518.
     
  4. MoparsOnly

    MoparsOnlyIt's great to be young and insane

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    Another question. I was taking the rear lift blocks out and noticed a electrical connector that goes to a sensor on top of the rear diff. What the hell? ABS? Speed sensor? Never seen this. I'm used to the older models. 85 and down.
     
  5. MoparsOnly

    MoparsOnlyIt's great to be young and insane

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    by the way sporty it's a 518 now I have to figure out If It's a RE or RH.
     
  6. 7mopar

    7moparWell-Known Member

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    I have one here myself that I need to figure that out on. Have just not taken the time.
     
  7. MoparsOnly

    MoparsOnlyIt's great to be young and insane

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    the speedo is electronic uses a pulse system at least that's what I got from PATC
     
  8. Polara_500

    Polara_500Well-Known Member

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    Probably the RWAL feature. ABS for the rear only essentially.
     
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    • MoparsOnly

      MoparsOnlyIt's great to be young and insane

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      Thanks Polara, Looks like it. found the little pump on the frame rail back there.
       
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      • 7mopar

        7moparWell-Known Member

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        you mean as no cable? Even in 88 there was a pulse box between the gear and spedo cable for a computer signal.
        I don't think the transmission I have even has a gear or the housing for one with it so that will not work anyway.
         
      • MoparsOnly

        MoparsOnlyIt's great to be young and insane

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      • 7mopar

        7moparWell-Known Member

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        What is the cable for if not the speedometer? A quick check under the dash will determine what the speedo head is. The wire just sends a pulse to the computer so that it can read ground speed and tell the od when to kick in and out.
        If not wrong the old 518 has a single wire to the valve body the controls od. The transmission I have has that singe wire.
         
      • MoparsOnly

        MoparsOnlyIt's great to be young and insane

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        I have no clue I wish someone would chime in to give us some clarity on this. This Trans Is a whole new thing for me. It being such an early model and everything.
         
      • 65 sporty

        65 sportyWell-Known Member

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        I would think your trans is a RH because of the year, it has hydraulic controlled governor pressure. The later trans is the RE because it has electronic controlled governor pressure.

        This helps some
        TorqueFlite - Wikipedia

        Your trans has the TV cable doesn't it?
         
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        • MoparsOnly

          MoparsOnlyIt's great to be young and insane

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          I really don't know. Is that the mechanical KD your talking about or, Is It like the thing that GM had back in the day where you would push the button to shorten or lengthen the cable that went to the trans.
           
        • 65 sporty

          65 sportyWell-Known Member

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          Yes, that's the cable I am talking about. It's more than just kickdown though. The RE trans doesn't have the cable because it is electronic, it has a pressure switch and solenoid to do what the cable does.
           
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          • MoparsOnly

            MoparsOnlyIt's great to be young and insane

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            Oooohhhh, I got It now. I'll have to look after this rain stops. I don't think It's working and If It Is It's not adjusted correctly. Thanks Sporty
             
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            • dodgefred

              dodgefredWell-Known Member

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              Right your transmission is a rh by the year. should be A500/42rh with lock up and overdrive or early 518/46rh. check the pan must be a deeper one

              42 RH OD.jpg

              a500.jpg
               
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              • LocuMob

                LocuMobFluid Technician

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                500 has the same shape pan as a 904, the 518 same shape as a 727. Might help.
                 
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                • MoparsOnly

                  MoparsOnlyIt's great to be young and insane

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                  From the link you shared before from I gathered It looks like A518 not the 500 Sporty. I also had a break in the weather this morning It Is a TBI system. It has a two cable system. I would say one for the pedal and the other for the TV?
                   
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