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Changed gears, now speedo off, I need a Toyota technician!!

Discussion in '2nd Gen. Tacomas' started by KingDavey, May 30, 2009.

  1. KingDavey

    KingDavey [OP] Active Member

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    Think about it...
    Western Massachusetts
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    2013 Regular Cab 4x4
    5100s, OEM back-up cam, JVC
    Hi everyone, I love the forums! You can find almost anything on here. Now my problem. I have a base 2wd 08 access cab with the 4 banger and manual transmission. I swapped out the diff carrier and diff with one from a double cab prerunner for the limited slip and better gears for spirited driving. Now my speedometer still reads like the stock gears are in it. I understand that the speed sensor is in/on the transmission, and that the info is sent to the ecu, then to the speedo. So how can I get the speedo to read right? Can a toyota tech use a Toyota computer and adjust my ecu to know that I have different gears? Or is there an aftermarket computer that works? Or are there different speed sensors like old transmissions that had swapable speed gears? I belive that my truck came with 3.31 and the gears I put in are 3.73. Any help would be greatly appreciated!! :goingcrazy:
     
  2. Johnson8537

    Johnson8537 Well-Known Member

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    Oregon
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    Revtek Leveling Kit with 1 1/2 block spacer in rear. 17" MotoMetal blacks on 32" tires. Access Lorado Tonneau - Bed mat Billet Grill Tinted Windows Pioneer 700BT with PAC steering wheel inerface. Wet Okole Seat Covers Front and back.
    I sawsomthing out there when researching Chips but it was VERY EXPENSIVE computer plug in to adjust the speedo! I dont know of anyone who did it?
     
  3. Janster

    Janster Old & Forgetful

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    Jandy
    Lancaster, PA
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    Advantage Torza top (tri-fold), Husky floor mats, RuffTuff seat covers, C2C hood struts, Homelink mirror, USA Spec PA15-Toy (120gig Classic & 8gig nano), Garmin Nuvi 660, Protecta Bed mat, Pop-n-lock, TSB Springs, Scangauge II, Heated drivers seat, Fumoto drain valve, Aries pushbar, PIAA 540 fog lights, Hood scoop grahics, Flowmaster 50 series dual catback exhaust, RainX Latitude windshield wipers, Husky rear floor liner (ontop of folded down seats). Console Vault.
    Changing the gears will not affect your speedometer. It should still be accurate.

    Did you test it? Got a GPS?

    If you change tire size (diameter) and go bigger or smaller, the speedo won't be accurate anymore.
     
  4. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    FlimFlubberJAM
    Tenoe, AZ
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    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Changeing gear will affect the speedo. Just like larger or smaller tires. It wont affect it if the speedo signal is taken from the diff.
     
  5. KingDavey

    KingDavey [OP] Active Member

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    5100s, OEM back-up cam, JVC
    I also read in another thread of a speedo recalibrator from Dakota Digital. It seems quite involved, but it would probably work. Has anyone every dealt with one of these? And yes, the speed sensor is on the trans, not the diff.
     
  6. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    FlimFlubberJAM
    Tenoe, AZ
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    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    I havent delt with any spedo corectors. I useually just GPS my speed, and make a mental note of how far off my speedo is. :)
     
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