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Thread: Speedometer stopped working (not speedo cable?)

  1. #1

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    Speedometer stopped working (not speedo cable?)

    Hey all - happy to be making my first post on the forum. I recently got a '93 mighty max and overall it is running well - though I think it needs a new head gasket but that is another story.

    When I purchased the vehicle the speedo worked just fine and suddenly stopped while on the highway. I figured it must be the speedometer cable but I received a replacement today and it did not work. By 'did not work' I mean I secured it to the transmission and observed that there was no movement at the opposite end of the cable when I drove the vehicle around.

    I took another look under the truck and here's what I saw - which might be relevant in fixing the issue.

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    I don't know the purpose of these two wires but they are attached to the transmission and emerge from the wiring harness. It looks like this has been repaired at some point. I assume there is power running through one of the wires, though I haven't taken a volt meter to them yet. Are they related to the speedometer? Any input on where to go from here is appreciated!

  2. #2



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    that is the reverse light switch- has nothing to do with the speedo problem. pull the speedo gear out and look at it-it comes out by taking the y shaped bracket off the side of the tranny where the speedo cable hooks up and spin the round housing out of the tailshaft.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  3. #3

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    Excellent! I'll give an update once I take a look in there.

  4. #4

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    Hmm, I was able to remove the bracket but the housing only moved maybe 1/4 turn before it froze up completely. I've got some penetrating oil on it. We'll see...

  5. #5

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    No luck. Maybe I just don't have the brute strength or tools required, but I get the impression it should not be this difficult.

  6. #6

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    Any luck?

  7. #7

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    The cable bracket right next to the reversing light wiring looks like it had kinked the cable a bit. This could cause (or maybe already has caused) the cable and inner sleeve to wear out. I know this isn't the most fun job you can do but it might be worth your while to pull the entire speedo cable out and inspect it. I have never heard of the cable spline drive in the gearbox extension housing failing but there's always a first time...

  8. #8

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    If the speedo gear unit is like other Mitsus, it needs to come out very straight. Rocking it side to side will only get it bound up in the transmission housing. The best bet, if you've got room, is to rotate it in the hole and try to pull it outward as it rotates.

  9. #9



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    did you get the right cable - the manual and automatic cables have a different cable end at the tranny, and the speedo won't work because it won't lock to the speedo gear.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

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