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Differential gears

Discussion in 'General Tundra Discussion' started by C-tundra, Sep 9, 2016.

  1. Sep 9, 2016 at 5:40 AM
    #1
    C-tundra

    C-tundra [OP] New Member

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    So I'm guessing the answer to the actual question is no, nobody has ever changed the gears in the differential for better fuel mileage
     
  2. Sep 9, 2016 at 7:59 AM
    #2
    Relentless

    Relentless Eric @Relentless Fab Vendor

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    So I don't really actually see a question... moreso you're anticipating our answer to your question of "Has anyone regeared taller for better gas mileage"? lol, anyways...

    In the 07+ you dont have any options for it really, 4.30(stock) and 4.88 aftermarket are about all I know of.
    If you're talking 1st gen Tundra there may be some taller gears out there, but I'm not sure it would help anyways. Might drop the engine too low in the RPM range and drop out of the power band causing it to hunt between gears or unlock the torque converter and therefore hurt mpg's.
    For the cost, I honestly dont see any real benefit to even try to regear taller. You'd probably spend a lot more money swapping gears then you would save over the years from very slight MPG improvement.
     
  3. Sep 9, 2016 at 4:23 PM
    #3
    ColoradoTJ

    ColoradoTJ Moderator Staff Member

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    Didn't the non- tow package Tundras have 4.10 gears?
     
  4. Sep 9, 2016 at 4:38 PM
    #4
    ColoradoTJ

    ColoradoTJ Moderator Staff Member

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    Personally, unless you get a screaming deal on a set of gears, master install kits, and do the gear setup yourself, you will never recoup the money spent on this.

    Seriously, if it bothers you this much, go get a Eco-diesel Ram, D-max Chevy Colorado or something like that.
     
    Relentless and zcarpenter92 like this.
  5. Sep 9, 2016 at 4:46 PM
    #5
    zcarpenter92

    zcarpenter92 Yotas, Coronas and 'Merica

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    It's because he posted another thread on this subject and everyone gave him the same response: "why would you want to regear it?"
     
    Relentless likes this.
  6. Sep 9, 2016 at 4:52 PM
    #6
    Backslider

    Backslider Thirsty...

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    Or buy a used Prius and use it to daily, and save your truck for more trucky things..
     
  7. Sep 9, 2016 at 8:47 PM
    #7
    ColoradoTJ

    ColoradoTJ Moderator Staff Member

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    I would get a Camry or Corolla before a Prius, but I get your point.
     
    zcarpenter92 likes this.
  8. Sep 10, 2016 at 2:03 AM
    #8
    Spvrtan

    Spvrtan Amateur fabricator

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    Black '14 CM SR5 w/ SC; 40s on 17s; 5.29s
    I'm going to regear soon but not for MPG (it'll actually worsen).
     

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