Speedometer Gears

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by linkwhy, Feb 13, 2018.

  1. Feb 13, 2018
    linkwhy

    linkwhy Member

    Joined:
    Jun 7, 2007
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    59
    I have a 74 cj5 304 t15 trans 33x121/2 3.73 gears tires how do I get the speedometer to read right thanks
     
  2. Feb 14, 2018
    scuter83

    scuter83 Member

    Ann Arbor, MI
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  3. Feb 14, 2018
    numbersix

    numbersix Newberg, Oregon

    Oregon
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    Mar 31, 2012
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    I'm not aware of anyone that sells speedometer gears for the Dana 20. I thought the only way to fix was via one of those expensive ratio adapters. If anyone does find or know of a source for D20 speedo gears, I'd sure like to know as well.
     
  4. Feb 14, 2018
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    The original poster needs to remove his driven gear from under the speedometer cable and adapter on the D20
    Record the current number of teeth and the SW number stamped into the gear.
    Typically one tooth up or down is good for about 5-6 mph.
    The driven gear must be matched to the drive gear inside the D20.
    Don't just buy any old gear; you can damage what you have.
    So check first then report back.
     
  5. Feb 14, 2018
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    I've seen some on ebay; don't know if it's Crown or another company that is making a few.
     
  6. Feb 15, 2018
    zila

    zila I throw poop

    Rock Springs,...
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    Oct 6, 2003
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    863
    Actually, have an app on my phone the has a speedo on it.. I just use it if I really care how fast I am going
     
    DHill78 likes this.
  7. Feb 15, 2018
    nickmil

    nickmil Super Moderator Staff Member Sponsor

    Happy Valley, OR
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    If the OP can determine what gears are needed I'd post an ad in classifieds. Enough 20 parts are floating around that someone probably has some. I may in my stash somewhere.
    The ones linked to above won't work. They are late model gears and are completely different.
     
  8. Feb 15, 2018
    3b a runnin

    3b a runnin Sponsor Sponsor

    virginia
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    this
     
  9. Feb 15, 2018
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Can't drive and play with phones out here.....
     
  10. Feb 15, 2018
    3b a runnin

    3b a runnin Sponsor Sponsor

    virginia
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    just set it in the cup holder
     
  11. Feb 15, 2018
    zila

    zila I throw poop

    Rock Springs,...
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    Can't here either so I open the app before driving. The put it in the dash mount..
     

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