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Speedometer question

Discussion in 'The Garage' started by 99firehawk, Jan 17, 2004.

  1. 99firehawk

    99firehawk 1/2 ton status

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    Ok, I need to know what is the term for the part in between the speedo cable and the tc. My speedo is screwing up and I have replaced the cable, the gears are ok and the speedo head works when I spin the cable so thats the only thing I think it can be, so I need to know what it is called.
    thanks

    brad
     
  2. Tweetysuarus

    Tweetysuarus 1/2 ton status

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    Speedometer Transducer( the little blocky thing between the cable and TC)
    Bill
     
  3. R72K5

    R72K5 Banned

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    if you need any speedo parts from a 203 then i have them, in good shape,. there is a short length of shaft that goes inside there between the box and the speedo gear in the case, about an inch or 1.25" long or so,
     
  4. 99firehawk

    99firehawk 1/2 ton status

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    I have a 208, are they interchangeable, I will probaly just go to the junk yard in the morning and grab one.now that I know what to call it. Thank you guys
     
  5. 99firehawk

    99firehawk 1/2 ton status

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    What is the purpose of the transducer? Can I eliminate it and just run the cable to the speedo gear using a 2wd speedo gear "housing"?
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    Does this piece "offset" the speedo cable from the actual TC speedo driven gear?

    If so, thats a ratio adapter. Don't think they used them much later on though.

    Thought a transducer was the thing that was used in the engine bay to run cruise control on non-electronic cruise trucks. (pre '83 sometime)
     
  7. 99firehawk

    99firehawk 1/2 ton status

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    Yeah its offset, is it factory or aftermarket?
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    Probably factory. I recall seeing part #'s for these in the '85-86 parts catalog, so they WERE out there.

    Of course, someone could have done like me as well, to "fine tune" the speedometer with different tires and rear axle ratios, I just installed one that was darn close to perfect.

    The ones I've seen come apart. (seperate in the middle) If you pull it off the vehicle, you should be able to "drive" one end of it with your hand, and watch the other side to see if it works. Of course, the innards could be messed up just enough to not work under the load of the speedo cable, but with no load, might appear to work right.
     

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