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4.56 vs 4.88 Gears

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Manwithoutaplan, Jan 10, 2011.

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  1. Jan 10, 2011 at 2:10 PM
    #1
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    I Debating between whether to get 4.56 gears or 4.88 gears. IF people can give me the pros and con on each that would appreciated.
     
  2. Jan 10, 2011 at 2:11 PM
    #2
    PLC721

    PLC721 Well-Known Member

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    4.56 would bring power back and you'll have lower highway rpm's than 4.88's
     
  3. Jan 10, 2011 at 2:13 PM
    #3
    mjp2

    mjp2 Living vicariously though myself Moderator

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    I was considering over gearing to 4.88s until Chris4x4 mentioned something that I had overlooked. With gears that steep, the pinion is going to be tiny and the ring teeth are going to be necessarily thin. Thinner gears generally mean less strength.

    Something to consider if you wheel hard.
     
  4. Jan 10, 2011 at 2:18 PM
    #4
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    IS the cost of both pretty much the same ??
     
  5. Jan 10, 2011 at 2:19 PM
    #5
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    Regeared and if so what are you at?
     
  6. Jan 10, 2011 at 2:21 PM
    #6
    JLee

    JLee The Man! Vendor

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    I lost track thousands of dollars ago.
    Yeah when i re-gear I'm going with 4.56 I don't want to be at 3500rpms at 75 with the 4.88
     
  7. Jan 10, 2011 at 2:28 PM
    #7
    cameronlane

    cameronlane Well-Known Member

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    True the teeth are smaller, but there are also more contact points and you really do not loose strength.

    When talking about re-gear, you have to look at your purpose for doing so. If you are staying on the street you might want to have 4.56 for your 35" tires. If you are going to be doing any kind of wheeling you may strongly want to consider 4.88 to give you more slow control over obstacles.
     
  8. Jan 10, 2011 at 2:33 PM
    #8
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    IF you talking about 100% i am wheeling about 20% of that. SO should i consider 4.56 gears?
     
  9. Jan 10, 2011 at 2:43 PM
    #9
    mjp2

    mjp2 Living vicariously though myself Moderator

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    4.56s will serve you very well with 35" tires.
     
  10. Jan 10, 2011 at 2:47 PM
    #10
    bjmoose

    bjmoose Bullwinkle J. Moose

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    Overall, 4.56 vs. 4.88 is a pretty small difference. And you didn't tell us what size tires you're running.
     
  11. Jan 10, 2011 at 3:15 PM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Correct about the contact points. The 4.56 ring gears has 41 teeth, while the 4.88 has 39. More importantly, The 4.88 uses an 8 tooth pinion, vs. the 9 tooth pinion for the 4.56. Therefor, the 4.56 is the stronger of the 2, as there is more engauged surface area, and (by haveing a little larger pinion gear), less chance for damage due to shock loading of the diff.
     
  12. Jan 10, 2011 at 4:33 PM
    #12
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    I have 315/70/17 which are pretty much 35 inch tires.
     
  13. Jan 10, 2011 at 4:36 PM
    #13
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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  14. Jan 10, 2011 at 4:38 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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  15. Jan 10, 2011 at 4:44 PM
    #15
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    so what is the reason in the east coast gear supply it say 4.56 thick? Does that mean the gear is casted from strong steel?
     
  16. Jan 10, 2011 at 5:24 PM
    #16
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I dont understand.
     
  17. Jan 10, 2011 at 5:29 PM
    #17
    crf69

    crf69 scraping my emblems off my plasti-dip

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    ummm yeah
    go 5.13
     
  18. Jan 10, 2011 at 6:16 PM
    #18
    Manwithoutaplan

    Manwithoutaplan [OP] the full Monty

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    The 4.56 gears are available in a thick cut gear to allow you to retain your factory 3.73
     
  19. Jan 10, 2011 at 6:18 PM
    #19
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Ok...This confuses the shit outta me. Why do you want to get 4.56 gears, if they are going to stay 3.73?? :confused::confused::confused::confused:
     
  20. Jan 10, 2011 at 6:22 PM
    #20
    boonduff

    boonduff Proud American

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    They made the ring gear thicker so you wont have buy a new case when you swap to the lower gearset.
     
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