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Anybody have a posi?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Brice, Jul 7, 2015.

  1. Jul 7, 2015 at 8:06 PM
    #1
    Brice

    Brice [OP] Turbo Member

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    were could i find a posi unit for a 99 prerunner taco? i read the door panel code and it says i dont have a posi but i would like to have one.
     
  2. Jul 7, 2015 at 9:48 PM
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    TACO626

    TACO626 Well-Known Member

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  3. Jul 8, 2015 at 7:15 AM
    #3
    tan4x4

    tan4x4 Well-Known Member

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  4. Jul 8, 2015 at 10:38 AM
    #4
    Brice

    Brice [OP] Turbo Member

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  5. Jul 8, 2015 at 10:38 AM
    #5
    ramonortiz55

    ramonortiz55 Not A Well-Known Member

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    whats a posi?
     
  6. Jul 8, 2015 at 10:40 AM
    #6
    Brice

    Brice [OP] Turbo Member

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    kinda like a locker but automatic with no button to engage it
     
  7. Jul 8, 2015 at 10:44 AM
    #7
    Brice

    Brice [OP] Turbo Member

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    #7
  8. Jul 8, 2015 at 10:52 AM
    #8
    jmaack

    jmaack Well-Known Member

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  9. Jul 8, 2015 at 10:57 AM
    #9
    ramonortiz55

    ramonortiz55 Not A Well-Known Member

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    gotcha.

    is posi a short word for something longer? or just posi is a old school word itself?
     
  10. Jul 8, 2015 at 10:58 AM
    #10
    devinzz1

    devinzz1 Well-Known Member

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  11. Jul 8, 2015 at 10:59 AM
    #11
    devinzz1

    devinzz1 Well-Known Member

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    positive traction or "posi-trac"
     
  12. Jul 8, 2015 at 11:13 AM
    #12
    Brice

    Brice [OP] Turbo Member

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    hmm ill look into that no slip
     
  13. Jul 8, 2015 at 11:24 AM
    #13
    Brice

    Brice [OP] Turbo Member

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    I think i've decided to go with the no-slip
     
  14. Jul 8, 2015 at 11:26 AM
    #14
    tan4x4

    tan4x4 Well-Known Member

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    A posi (aka Limited Slip Diff), does not completely lock both sides. Only spools do that. Automatic lockers (Lock-rite, Detroit, etc) lock and unlock automatically as needed. The tru-trac is available for all Tacoma OEM rear diffs EXCEPT the e-locked diffs.
     
  15. Jul 8, 2015 at 11:53 AM
    #15
    ramonortiz55

    ramonortiz55 Not A Well-Known Member

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    gracias
     
  16. Jul 8, 2015 at 1:39 PM
    #16
    Brice

    Brice [OP] Turbo Member

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    Alright so i believe i have settled on the powertrax no-slip
     
  17. Jul 8, 2015 at 3:12 PM
    #17
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    This is what I ran in my 03 Tacoma and I ran them front and rear in my 89 pickup. I highly recommend these units, as they seamlessly transfer torque from one wheel to another vs any kind of locker that operates as like an on/off switch. They also do not wear out like clutch based units and require no gear oil additives. They make a unloaded pickup with MT tires much better to drive on in the rain on steep streets (as the tires won't spin) in addition to all the off-road benefits, and are more ideal in the snow (on the street) when you do not want your rear end to fully lock. The only time a locker will be significantly better is if one wheel has zero traction (ie airborne) then the torque transfer to the other grounded wheel will be zero.
     
  18. Jul 8, 2015 at 3:26 PM
    #18
    Brice

    Brice [OP] Turbo Member

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    would you happen to have the part # for that one? This locker/posi will be going into a 2wd prerunner. I dont want to do anything crazy but i need it to not get stuck easy as it is my only vehicle and converting to 4x4 basically voids my sell-a-bility

    EDIT: i have a 7.5inch oem open diff
     
  19. Jul 8, 2015 at 4:14 PM
    #19
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    Using Randys Ring and Pinion Diff Wizard, (where I get all my gearing work done) they do not show a TrueTrac for the 7.5 diff. I don't know if they are available for that diff.

    http://www.ringpinion.com/DiffWizard.aspx
     
  20. Jul 8, 2015 at 4:38 PM
    #20
    Brice

    Brice [OP] Turbo Member

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    well if they dont have one it looks as if im gonna use the powertrax
     

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