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Another speedo gear question

Discussion in 'Early CJ5 and CJ6 Tech' started by mdmeltdown, Dec 21, 2009.

  1. Dec 21, 2009
    mdmeltdown

    mdmeltdown Member

    Bossier City,...
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    Ok, I know this has been covered before, but I still have a couple questions. I just drove a guys '69 model 5 with the 6 and I kind of noticed the speedo seemed off, like it was reading way too slow for how fast I was driving. It has 31" tires, like mine has now. I noticed someone mentioned a chart that gives gear ratios with gear tooth count but the link is bad, I guess from when the site was down. Anyway, can someone give me a simple solution to this.

    I have 3.73 gears and will be running 31" tires. I also have a brand new NOS speedo with the orange dial and a D18 TC. Is there an aftermarket gear to set the stock speedo to the correct speed? If not, I have heard of an aftermarket speedo cable that you can adjust. Is there such a thing that will fit my jeep?
     
  2. Dec 21, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    There is not a "speedo cable adjustment" to fix your speedo but there are what are called "ratio adapters" that go in line with the speedo cable. They come straight, angled, 90*'s, etc.
    I can't help you on the math to figure what you need as that's not my strong suit. Hopefully Jim, Dante, Lynn, or one of the other smarter people will chime in on that:).
     
  3. Dec 21, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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  4. Dec 21, 2009
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Last edited: Jun 2, 2012
  5. Dec 21, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    I have used/ am using that info Jim...Thank you!
    I already had that page open when I saw this thread...
     
  6. Dec 21, 2009
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Last edited: Jun 2, 2012
  7. Dec 21, 2009
    mdmeltdown

    mdmeltdown Member

    Bossier City,...
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    When I said speedometer adjustment, I didn't mean anything stock. I was referring to something aftermarket. If I can find a bolt on adjuster, that interests me more than getting gritty with finding another gear. Are they manually adjustable or do you have to get one specific? Someone on that other post mentioned a "speedometer store." What's that?
     
  8. Dec 21, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    I agree! The id Jim has provided us with has proved invaluable to me in identifying boxes full of mismatched gears that will actually work together.
    I still owe you some cold :beer: Jim. You never sent me your address!:)
    Most/many of these gears are not produced any more and what's used is what's available, so everyone, save them! Nickmil
     
  9. Dec 21, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Oh. You mentioned gear ratios and corresponding speedo gear part numbers, so I assumed that you were looking for that.
     
  10. Dec 21, 2009
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Last edited: Jun 2, 2012
  11. Dec 21, 2009
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Last edited: Jun 2, 2012
  12. Dec 22, 2009
    mdmeltdown

    mdmeltdown Member

    Bossier City,...
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    Thank's JP. I'm looking for all possibilites, but from what was said, finding another gear would be harder than getting one of those ratio modifiers, right? Where can I get one of those?
     
  13. Dec 22, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Any shop that rebuilds speedometers or can calibrate them should be able to get them. Some driveline shops can too. I just don't know what you have available in your area.
     
  14. Dec 22, 2009
    mdbeck1

    mdbeck1 55 Willys CJ5

    Oklahoma
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  15. Dec 22, 2009
    mike starck

    mike starck Member 2019 Sponsor

    salem,oregon
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    Meltdown, have you used a handheld GPS to note the true speed.if you have one or borrow one take it in the jeep (prefferably with a passenger holding GPS)Note speed on speedo and gps reading.do this at say 30,50 mph, etc. this should give the shop some intication of the% of correction you need.recheck with GPS after your done.As Nic said thats about as easy as it gets. happy jeeping.

    mike s.
     
  16. Dec 22, 2009
    mdbeck1

    mdbeck1 55 Willys CJ5

    Oklahoma
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  17. Dec 22, 2009
    mdbeck1

    mdbeck1 55 Willys CJ5

    Oklahoma
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