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Regear with larger tires to fix Odo / Speedo?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by CaRefugee, Nov 17, 2009.

  1. Nov 17, 2009 at 6:22 AM
    #1
    CaRefugee

    CaRefugee [OP] Member

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    I've perused multiple threads that want to address this question but seem to always have conflicting answers.

    If you put on larger tires than stock, and regear your differentials, will this correct the odometer / speedometer?

    If so, does it matter whether the truck is an auto or stick?
     
  2. Nov 17, 2009 at 5:34 PM
    #2
    Brunes

    Brunes abides.

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    Auto vs Stick doens't matter IIRC- and it may fix your odo- but you need to figure out what the error in your speedo is and then make sure you do the math to get the gears to make the correction.
     
  3. Nov 17, 2009 at 5:41 PM
    #3
    ramjm_2000

    ramjm_2000 Well-Known Member

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    Went one size up in tire size (265 75 16), corrected my speedo to within 1 mph of my GPS.
     
  4. Nov 17, 2009 at 7:01 PM
    #4
    aww1970

    aww1970 Well-Known Member

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    I went up to a 265/70/17 and my speedo is now within 1% of my actual speed.

    On my stock tires it was 4% out.

    No need to re-gear.
     
  5. Nov 18, 2009 at 4:42 AM
    #5
    CaRefugee

    CaRefugee [OP] Member

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    Hmmm...another case for going with 32's (265/75x16) rather than 33's (285/75x16). I know it has been debated to death but it does beg the question of whether it fixed your speedo but now your odo is off. Of course, the odo being slow might not be a bad thing for resale.

    What I'm wondering is if I were to go with 33's on my 2006 Tacoma Double Cab V6 Auto TRD Offroad and regear the differentials to 4.11 gears both front and rear, would the regear bring the speedo and odometer into the correct spec?
     
  6. Dec 3, 2009 at 1:57 PM
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    all.on.black

    all.on.black Well-Known Member

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    A regear on the auto won't make a different to the speedometer. They get the speed from the abs system. I'm not sure if the manuals are the same or not but in the auto the regear won't make a difference. I know, I regeared.
     
  7. Dec 3, 2009 at 4:52 PM
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    Evil Monkey

    Evil Monkey There's an evil monkey in my truck

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    Regearing isn't going to make a difference in how fast the wheel turns. The wheel will still cover the same distance as it revolves. A larger wheel will cover more distance with each revolution so your speedometer will read lower than your actual speed. Regearing will affect how hard your engine has to works to turn the wheels.
     
  8. Dec 3, 2009 at 9:17 PM
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    all.on.black

    all.on.black Well-Known Member

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    This is true but regearing on vehicles that get their speed from the transmission will change the speedometer.
     
  9. Dec 4, 2009 at 9:04 AM
    #9
    Evil Monkey

    Evil Monkey There's an evil monkey in my truck

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