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Differential Question - Feeling stupid, please help.

Discussion in '2nd Gen. Tacomas (2005-2015)' started by 0uTkAsT, Sep 22, 2011.

  1. Sep 22, 2011 at 8:47 PM
    #1
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Ok, I'm feeling way retarded right now. I have been under the assumption that my 2006 base model 4X4 6-lug Tacoma with 4.10 gears and open diffs has a 7.5" front and an 8" rear carrier. Shopping for gears and lockers, I see references to many different 8" rear diffs (8" 30 spline, 8" turbo, 8" V6, 8" reverse, and 8.4") and also different 7.5" front diffs (7.5" 27 spline, 7.5" reverse, 7.5" 3.73 and down, 7.5" 3.91 and up [obviously I have a 3.91 and up but what's the difference what the ratio is when it's the carrier case that matters? Are they actually different carriers?]), and each diff has different part numbers for ring and pinions, master install kits, and lockers, but none of them reference years, trim levels, or even confirm they fit a freaking Tacoma.

    What's the difference? Please, for the love of God, tell me what exactly I have or tell me how to identify it myself. I've googled, TW'd, and called and emailed differential places and nobody can give me a straight answer! This should be easy! HELP!

    Oh, and thank you for saving my sanity :)
     
  2. Sep 22, 2011 at 8:57 PM
    #2
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Now I'm even more confused. Ugh.
     
  3. Sep 22, 2011 at 9:08 PM
    #3
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Almost everything I've read refers to the rear diff as an 8" and the front as a 7.5" except for Nitro.

    For example, Nitro Gear lists their 05-08 Tacoma gear set as follows:
    Front 8" Reverse Rotation 4.56 Thick Gear set (Fits 3.73 & Down Case)
    Rear 8" Standard Rotation 4.56 Gear
    set

    This indicates that you're correct about the 8" front diff, wrong about the 8.4" rear diff, and still doesn't explain why (and if) the 3.73 trucks actually have a different carrier case than the 4.10 trucks do.

    Now lets go to Richmond Gear and look at their Powertrax lockers. They only list lockers for Toyota trucks with 7.5" front diffs (not specifying gear ratio at all), have nothing at all listed for 8" front diffs, however they do list different part numbers for Toyota 8" Reverse, 8" Standard, 8" Turbo/V6, as well as 8.4" rear diffs.

    None of the information matches whatsoever. See where the confusion sets in?
     
  4. Sep 22, 2011 at 9:20 PM
    #4
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Stuff that makes it easier to run over other stuff.
    Wow, I appreciate the clarification, thank you very much. Just to double check, this is true for both 4 cylinder and 6 cylinder trucks correct? We have the exact same differentials front and rear? I have a 2.7L.

    If this is indeed correct, I'm pissed that my only option for a locker up front is ARB. I've been told numerous times that Richmond makes lockers for the front and rear of my truck... I was anticipating a $350-$400 price tag, not $1,000+, which is going to make it impossible for me to afford them...
     
  5. Sep 22, 2011 at 9:30 PM
    #5
    XPOTRPR

    XPOTRPR [[[[[[EXPOtrooper]]]]]] IG: xpotrpr

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    Honestly Josh, I'd say just go with the rear locker and re-gear. You'll be set man. We always wheel with other people, you have a shorter wheel base, etc. Ya know?
     
  6. Sep 22, 2011 at 9:35 PM
    #6
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Stuff that makes it easier to run over other stuff.
    The stuff we do is pretty gnarly. Traction is key here, we have a lot of slick rocks, ruts, and loose, sandy surfaces. Open diffs make it extremely hard to keep up with trucks that just have LSDs or even traction control, let alone ones that are locked. I'll get over my disappointment, but it would just be nice to go all out with it without spending two months pay ya know?

    Again, I really, really appreciate your help.

    Unless there's some 2WD dipshit out there (ahem... Matt :D ) I am always the weakest link. The gears will make a huge difference as far as power is concerned, but having an open diff up front is just gay. In ruts and shit, it might as well be a 2WD. As soon as one tire looses traction up front, everything depends on the rear again to pull out of it. Locking both axles enables you to crawl over/through challenges instead of having to mash the gas and pray you don't roll your shit trying to go over/through challenges as easily as possible, lol.

    P.S. I'm officially jealous of your OR now, jerk. :p haha
     
  7. Sep 22, 2011 at 9:56 PM
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    XPOTRPR

    XPOTRPR [[[[[[EXPOtrooper]]]]]] IG: xpotrpr

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    Oh i completely understand the front locker idea.. I'd love one.. if I was rich and had money to freely spend. But realisticly, you dont NEED one. You've gone everywhere I have.. one you get new gears, a rear locker, and your AAL's, you'll be so much bettter off man. I havent used my front "A" word yet, Lol, so technically, I'm open up front as well.. and still get around. don't stress It man. Spend that money on tires or your sub. :D

    Don't be jealous man.. your truck Is sick. You have better ascent and descent angles, recovery gear, and shorter wheel base. Plus, we always wheel together, so between both our trucks.. we are good to go.
     
  8. Sep 23, 2011 at 7:51 AM
    #8
    Wicked 2007

    Wicked 2007 Well-Known Member

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    I disagree. Since I have had my locker up front I have used it a bunch of times to get me out of spots I was stuck without it until I engaged it and pulled out with ease. You never have true full 4wd without locked front and rear.
     
  9. Sep 23, 2011 at 8:18 AM
    #9
    XPOTRPR

    XPOTRPR [[[[[[EXPOtrooper]]]]]] IG: xpotrpr

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    Oh I know we dont have true 4wheel drive. But a locker rear 4wheel can go a Hell of a lot of places. We dont rock crawl or anything.. or go anywhere where we need a locked front.. and if we did go somewhere that needed one, and didnt have one.. that's just poor wheeling and decision making. Don't get me wrong, id love a front locker.. if i could justify it or really needed it.
     
  10. Sep 23, 2011 at 8:26 AM
    #10
    David K

    David K Well-Known Member

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    I agree with the others here that a REAR LOCKER is worth the investment, but a FRONT LOCKER can wait until you win the lottery.

    Once you have the rear locker, go wheeling in your tough areas and see if you need the front locked, as well. I did the Mision Santa Maria run in my '01 and '05 Tacomas with rear locker and open front diff. ... and that is about the toughest trail in Baja.
     
  11. Sep 23, 2011 at 9:48 AM
    #11
    maxamillion2345

    maxamillion2345 Go home if you don't like guns liquor and whores.

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    Yep. Go Rear locker. Also, he is correct about the 8.0 and 8.4
     
  12. Sep 23, 2011 at 10:10 AM
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    PSJ

    PSJ Prerunners Work

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    Overkill perhaps, but for those who did not know, this rear end is in the original V-8 Tundras, but as mentioned, it is also used in the current 2.7L 4 cyl's as well.
     
  13. Sep 23, 2011 at 11:29 AM
    #13
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Thanks everyone for in info, I really appreciate it!
     
  14. Sep 23, 2011 at 4:12 PM
    #14
    97yota4wd

    97yota4wd Well-Known Member

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    i didnt really ready anything, but i saw moose saying you dont need a front locker.

    JOSH, you NEED it. MUST HAVE it.:D
     
  15. Sep 23, 2011 at 4:13 PM
    #15
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Wanna give me $1k for an ARB? ;)
     
  16. Sep 23, 2011 at 4:20 PM
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    XPOTRPR

    XPOTRPR [[[[[[EXPOtrooper]]]]]] IG: xpotrpr

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    F off Eric. Lol.
     
  17. Sep 23, 2011 at 4:22 PM
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    97yota4wd

    97yota4wd Well-Known Member

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    this guy does VV

    jelly
     
  18. Sep 23, 2011 at 4:26 PM
    #18
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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  19. Sep 23, 2011 at 4:44 PM
    #19
    XPOTRPR

    XPOTRPR [[[[[[EXPOtrooper]]]]]] IG: xpotrpr

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    Shit.. If I had a grand to spend.. It sure wouldn't be on a front locker. lol
     
  20. Sep 23, 2011 at 6:04 PM
    #20
    0uTkAsT

    0uTkAsT [OP] Gunslingin' Gearhead

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    Haha true. Doesn't mean I don't want one. I've spent a grand on more useless shit than a locker before.
     
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