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Speedo Gears For Calibrating?

Discussion in 'Early CJ5 and CJ6 Tech' started by mickeykelley, Jan 18, 2017.

  1. mickeykelley

    mickeykelley Well-Known Member

    Are there different speedo gears for the tranny to compensate for taller tires. I put on 215/R85 16 and now the speedo says 40 but iPhone says 42. Is there an adjustable steering stop?
     
    mickeykelley, Jan 18, 2017
    #1
  2. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Dana 18 Speedometer Gear 22 Tooth Willys Cj2A Cj3A M38 M38A1 Cj5 45-71 18670.33 | eBay
    Speedometer gear fits 54-62 willys wagon 4:27 gear ratio | eBay

    Might be tricky finding the right one, I dunno.

    But 5% is not a big variation in a speedometer. Even tire pressure could do that.

    Have you checked at different speeds, or better, compared the odometer over a measured mile? ( The state DOT may have one laid out someplace.)

    Yes the steering stops are adjustable, if you cut the weld on the thread.
     
    PeteL, Jan 18, 2017
    #2
  3. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Get rid of the iphone, problem solved.

    Seriously, mechanical speedos are not dead on unless they've been specially calibrated (i.e. police cars), IIRC most are +/- 3 MPH anyhow. You won't find any special gears to fix it anyhow.

    H.
     
    Last edited: Jan 19, 2017
    Howard Eisenhauer, Jan 19, 2017
    #3
  4. Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    +2 I wouldn't even worry about it . mine has been off for years
     
    Twin2, Jan 19, 2017
    #4
  5. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    That was my first thought too, but I didn't want to be the one to say it. :D

    Who ya gonna believe, your faithful Jeep or your lyin' iphone???
     
    PeteL, Jan 19, 2017
    #5
  6. Glenn

    Glenn Kinda grumpy old man Staff Member

    I seriously wouldn't worry about it either. Going by the radar trailers the cops have out my '06 Ram is 1 mph off.

    For the steering you might consider getting wheel spacers. Can you post a picture of the new tires? You know we'd love to see it. :)
     
    Glenn, Jan 19, 2017
    #6
  7. mickeykelley

    mickeykelley Well-Known Member

    PeteL, very strange thing. When I view this thread on my iPhone, for some reason there are red devil horns drawn in on your avatar. Not sure why.
     
    mickeykelley, Jan 19, 2017
    #7
  8. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I just want to say for the official record, that I for one welcome our new cyber-lords.
    :whistle:
     
    PeteL, Jan 19, 2017
    #8
    BobH likes this.
  9. mickeykelley

    mickeykelley Well-Known Member

    mickeykelley, Jan 19, 2017
    #9
    Glenn and FinoCJ like this.
  10. mickeykelley

    mickeykelley Well-Known Member

    Suck up.
     
    mickeykelley, Jan 19, 2017
    #10
  11. Focker

    Focker That's a terrible idea...What time? Staff Member

    Tip - If you click on the post number (in this case #309) you can copy and paste a link to that specific post.

    BTW...I like the tires.
     
    Focker, Jan 19, 2017
    #11
  12. Glenn

    Glenn Kinda grumpy old man Staff Member

    Glenn, Jan 19, 2017
    #12
  13. mickeykelley

    mickeykelley Well-Known Member

    Learned something new. Thanks.
     
    mickeykelley, Jan 19, 2017
    #13