Speedo still dead. Odometer works.

1968 -1970 Mopars

  1. Mark1972

    Mark1972 FBBO Gold Member FBBO Gold Member

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    New cable. Cars up on stands. Put in drive and the odometer turns but speedo still dead. If the trannsmission speedo gear us good, and I can watch it turn the inner cable, then I assume my speedo gauge itself is shot or broken? Before I pull the gauge cluster again, any ideas? Trying to get safetied soon.

    1970 Plymouth Satellite base model
    A904
    318
    Non rally dash
     
  2. khryslerkid

    khryslerkid FBBO Gold Member FBBO Gold Member

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    If the odometer is working then you know the gear in the trans and cable are ok.
     
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    • pearljam724

      pearljam724 Well-Known Member

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      If you have the rectangular standard gauge. The speedometer is broke. A plastic bushing that the pointer, stem goes through. Gets brittle and when it cracks it will no longer work. I can’t see it being easily repairable. Many people obtain gauges over the last 20-30 years from cars that sat outside too long.
      I was in the same boat. An easy way to detect this before buying one. If the needle doesn’t point at zero, at rest. Then the plastic bushing is cracked/broken. The pointer stem will move in and out. Move the needle by hand and it doesn’t crack back to zero with force. Same deal.
      The odometer is unlikely to ever break. It’s only consists of a metal worm gear and metal sprocket and will work as long as your cable is good.
       
      Last edited: May 5, 2019
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      • Mark1972

        Mark1972 FBBO Gold Member FBBO Gold Member

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        Thank you for the help. Yes, I believe the speedo gauge itself is broken. Add that to my temp and fuel gauges, and it might be easier to find a whole new gauge cluster. Or used I should say. Can the speedo gauge itself be replaced?
         
      • pearljam724

        pearljam724 Well-Known Member

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        They can all be replaced separately if you want. My suggestion is just spend for a nice looking full cluster and save your current one for parts if needed. Then sell the old.
        I had the same exact problems as you not long ago. I thought I was looking at replacing my sending unit, messing with ground strap. Betting the float at least needed replaced. I bought a very nice cluster. Fixed all my problems. Everything works now. Don’t buy anything with rust on the back. Good indication it sat outside too long. Look closely at the circuit on back for burn marks or damage areas. Extremely common that the pins are broke on the back that the harness connects to. People aren’t delicate enough removing/installing harness. Make sure all pins are present and not bent buying a new one. Many for sale have a pin or 2 broken off.
         
        Last edited: May 5, 2019
      • BeepBeepRR

        BeepBeepRR Well-Known Member

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        I have a speedo ill sell you cheap. It was working fine swapped clusters for one with a good board.

        IMG_1934[1].JPG
         
      • scottmann27

        scottmann27 Well-Known Member

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        Mine shows 30 mph sitting still and never moves
         
      • pearljam724

        pearljam724 Well-Known Member

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        Same deal, I described above. Your plastic bushing is cracked. When the bushing cracks. It doesn’t hold the needle’s stem in place properly. That’s why it’s stuck where it’s at, 30 mph. And won’t move.
         
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        • Billccm

          Billccm Well-Known Member

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          Contact Dicks Speedo in Tempe, AZ.
          He rebuilds speedometers and clusters.
           
        • Richard Cranium

          Richard Cranium FBBO Gold Member FBBO Gold Member

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          That just doesn't sound right.
           
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