Instrument Cluster?

Discussion in 'Parts Interchange' started by MikeG747, Dec 4, 2005.

  1. MikeG747

    MikeG747 Member Supporting Member

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    Has anyone ever put an older Cluster in a 77. The 77 reads 100 MPH. Was wanting to put a 73 model in that is available that reads 120 MPH. I was wondering if the wiring is the same & if the Speedometer would read correctly etc.. My son's 77 needs a new cluster & we can't locate a 77 cluster.
    Thanks, Mike:)
  2. ratio411

    ratio411 Member

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    I don't know your answer, but if you do a search, I saw that topic being discussed in length. Was in the last week or two.

    I like the looks of the earlier one myself.
    I think 75 was the last year for it.
    Good luck
    Dave
  3. Mavaholic

    Mavaholic Growing older but not up!

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    The speedometers are interchangeable.
  4. Yellow72Mavrick

    Yellow72Mavrick Banned

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    Yep what Mavaholic said...
  5. PART-TIME

    PART-TIME Member

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    There is a difference with the early and late model printed curcuit sheet that mounts on the back of the cluster. I think there is an extra curcuit added for late model economy idiot light. If idiot lights dont matter, then everything should interchange. When changing from 100 MPH to 120 MPH, don't forget to get your speedo calibrated.


    Ken
  6. MikeG747

    MikeG747 Member Supporting Member

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    Where do you go to get them calibrated?
    Thanks, Mike:)
  7. Mavaholic

    Mavaholic Growing older but not up!

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    Dosent need calibration. Its self contained.
  8. PART-TIME

    PART-TIME Member

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    Dennis,
    You don't need to calibrate (change the plastic trans. gear)when you change the speedo from 100 MPH to 120 MPH????????


    Ken
  9. Jamie Miles

    Jamie Miles the road warrior Supporting Member

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    Don't know the exact years, but a cluster from a '71 Maverick would not plug into my '74 Maverick's wireing harness. The '74 plug was smaller then the 72's plug. You will probably have to take the clusters apart and and put the early guages in your '77 cluster. As far as the idiot lights, I "think" you should be able to swap the plastic film that clips into the back. Hard to explain without showing what I'm talking about...

    As far as I've seen, '74 was the last year of the 120 mph speedometers.
  10. Mavaholic

    Mavaholic Growing older but not up!

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    Nope. The difference is in the speedometer its self. They just have stiffer springs in the 120 movement. Its easy enough to verify. Just take a drill and hook it up to each one and run the drill full speed. It will read the same mph on both.
  11. Mercurycruizers

    Mercurycruizers David (Coop) Cooper Supporting Member

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    There is a difference with the plug. I tried to put a 74 cluster in my 73 & the plug wouldn't fit. I ended up destroying the 74 cluster, trying to cut the hole big enough. Just my 2 cents....
  12. PART-TIME

    PART-TIME Member

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    Thanks Dennis for the correction. Ya learn something new everyday.


    Ken
  13. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI Supporting Member

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    I went out and compared the ones I have. The early style housing has a bigger plug than the later style housings. While the "insides" may be interchangeable....the white plastic housing as well as the circuit strip is different and will not interchange.
  14. ratio411

    ratio411 Member

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    My 75 has the 120.
    It also has the metal look center on the pods.
    My car was a "non-cat" 75, however some 75s had cats.
    I think that is the difference.
    If your car had cats, you had the later gauges...
    All black
    100 mph
    and most significantly, "unleaded fuel" label on the gauges.
    Dave
  15. sierra grabber

    sierra grabber Certifiable

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    well if you dont care about a little splicing on the wires for the back of the cluster you could just splice the plug on to the wires in your dash. might have to verify they are for the same things.:huh:
  16. MikeG747

    MikeG747 Member Supporting Member

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    I got the 73 Cluster in & as you guys said the wiring harness plug will not fit.:mad:
    Anyone have a 76 or 77 cluster available. My sons is crumbling.:eek:
  17. PART-TIME

    PART-TIME Member

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    Mike,
    Disassemble the cluster that came out of the 77 and transfer the back side plastic housing to the 73 cluster. (or just transfer the speedo to the 77 cluster)


    Ken
  18. MikeG747

    MikeG747 Member Supporting Member

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    Ken the back side plastic is the part that is crumbling.
    Thanks, Mike
  19. Acornridgeman

    Acornridgeman MCCI Wisconsin State Rep Moderator Supporting Member

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    Craig, what years did you compare? What year did they switch to a small connector?

    I've noticed that just about every 76-77 cluster I've had apart was turning to dust, like brittle chalk. I think Ford changed vendors for this part and the plastic they used will not stand up to time. I have never had an older one turn brittle.
  20. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI Supporting Member

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    I am not sure what years they were. I would say the change took place the same time they switched from a 120mph speedo to a 100mph speedo.

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