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is a 09 tacoma rear diff a 8" or a 8.4"?

Discussion in 'Technical Chat' started by taco_man, May 20, 2010.

  1. May 20, 2010 at 7:41 AM
    #1
    taco_man

    taco_man [OP] Well-Known Member

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    anyone know? ive been told both so i want to make sure before i buy the locker
     
  2. May 20, 2010 at 7:48 AM
    #2
    BlueT

    BlueT Well-Known Member

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    I moded 1999 Taco so much it had turned to Land Cruiser
    E-locked = 8
    all the rest 8.4
    Lookign for gears I presume ...
     
  3. May 20, 2010 at 7:51 AM
    #3
    taco_man

    taco_man [OP] Well-Known Member

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    no im looking a truetrac locker. puttin in gears next weekend and i want to do the locker at the same time so i dont have to pay install twice. ive seen truetrac on my buds f350 and it was awesome so thats wat i want on my truck. why does the e locker have a smaller diff?
     
  4. May 20, 2010 at 7:58 AM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    They are actually all 8". The non-elocks are called 8.4" mistakenly.
     
  5. May 20, 2010 at 8:03 AM
    #5
    taco_man

    taco_man [OP] Well-Known Member

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    so do i actually need to order a 8 inch locker?
     
  6. May 20, 2010 at 8:11 AM
    #6
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    This one

    TrueTrac 913A541
     
  7. May 20, 2010 at 8:12 AM
    #7
    taco_man

    taco_man [OP] Well-Known Member

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    thats the one i was looking at. should work right?
     
  8. May 20, 2010 at 8:18 AM
    #8
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    Yes, it will.

    I apologize if I confused you. All of the gears (diffs) measure 8" , but they are not all referred to as 8" gears. That's why you see all the aftermarket support refer to them as 8.4". I guess to eliminate confusion.
     
  9. May 20, 2010 at 8:22 AM
    #9
    taco_man

    taco_man [OP] Well-Known Member

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    thanks man. this cleared up a lot of the confustion. i will be buying this locker right now!!! hell ya!
     
  10. May 20, 2010 at 8:25 AM
    #10
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
  11. May 20, 2010 at 8:28 AM
    #11
    taco_man

    taco_man [OP] Well-Known Member

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  12. May 20, 2010 at 8:29 AM
    #12
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    30 spline
     
  13. May 20, 2010 at 8:50 AM
    #13
    BlueT

    BlueT Well-Known Member

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    I moded 1999 Taco so much it had turned to Land Cruiser
    Diff is not smaller but Ring (as Ring and Pinion) is narrower on e-locked thus to make difference refereed to as 8" only.
    BTW Truetrac is not a locker its a LSD. ;) So are you sure thats what your friend had ?
     
  14. May 20, 2010 at 8:59 AM
    #14
    taco_man

    taco_man [OP] Well-Known Member

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    o my bad i meant posi track. thats what he said he had. would that make more sense?
     
  15. May 20, 2010 at 9:05 AM
    #15
    BlueT

    BlueT Well-Known Member

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    I moded 1999 Taco so much it had turned to Land Cruiser
    I think people call that posi track. one thing I would be carefull you have 09 which has VSC and ATRAC. I would call eaton if you can use it with those two. VSC and ATRAC work by applying brakes which means Truetrac is going to shift power to other side much more quickly and much more power then what open diff would do. You may want to check that, however I will be very interested when you do install and drive that. it could be a awesome configuration:)
     
  16. May 20, 2010 at 9:12 AM
    #16
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    That's on the OR. Does it come on the Texas Edition?
     
  17. May 20, 2010 at 9:17 AM
    #17
    BlueT

    BlueT Well-Known Member

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    I think VSC and ATRAC came standard on all 09+ trucks. I dont know I have 07 with none of that electronic gzmos :D
     
  18. May 20, 2010 at 10:02 AM
    #18
    taco_man

    taco_man [OP] Well-Known Member

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    yea I have vsc and atrac. jegs said I can't do it then I called eaton and they said I was acting stupid so I haven't really got much help.any one kno if I Can do this or not
     
  19. May 20, 2010 at 10:09 AM
    #19
    HBMurphy

    HBMurphy Ban Pending

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    I know I am a broken record but I have set up rears before (my family owned a repair shop and now distributes Auto and Truck parts)... I could get a deep discount but I use East Coast Gear Supply 'cause that is pretty much what they eat, drink and sleep! Set one up wrong and you have lost any savings.
     
  20. May 20, 2010 at 10:25 AM
    #20
    BlueT

    BlueT Well-Known Member

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    Who or what is jegs ??
    You can definitely fit there but big question is if that will make those electronic traction controls crazy. :)
    It could, but until there is somebody with truetrac and 09+ traction control we will not know for sure.
    My biggest concern would be that all those electronics are not pressure sensitive and they just put pressure on the brakes until the spinning wheel stops moving then let go then press again. that would make truetrac shift between sides with brute force. Low speeds, low torque should not be a big deal but at highway speeds that could send you towards the wall pretty quickly.
     
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