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Will 4.11's work with 4.10's?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by derek2002, Dec 25, 2000.

  1. derek2002

    derek2002 1/2 ton status

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    Will 4.11\'s work with 4.10\'s?

    Alright-

    I know that you have to run the same gears in the front of a 4x4 as the rear, but how close does it have to be? If I get a 4.11 geared rear end, can I regear my front end to a 4.10 (I can get this r&p easier)???? Let me know..

    Later,

    -Derek
    1986 3/4 Ton & 1987 Blazer Project
    <A target="_blank" HREF=http://www.4chevy.com>http://www.4chevy.com</A>
     
  2. fr8train

    fr8train 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    I know a guys who runs tis set up. It hasnt caused him any problems as of yet. He has had it for two years, he runs a 205 case. there is no t-case hiccups or any stuters. I guess its ok, since they are so close. Try contacting Randys R+P and ask them what they think.
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    <font color=blue>Sometimes people call 4.10s 4.11s and vice versa. Our trucks came from the factory with slightly lower gears in the front. My 77 dana 44 HD has 4.09 gears and the rear that came with it had 4.10s. This is so the front pulls the truck slightly off-road. You should be fine with those gears</font color=blue>

    [​IMG]
     
  4. 90K5

    90K5 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    i think if its within .03 of the other one, its fine.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: Will 4.11\'s work with 4.10\'s?

    Most trucks come from the factory like this. Real common for Chevy was 3.07 front 3.08 rear for example. 4.09 fronts and 4.10 or 4.11 rears are also common. The difference is negligible, air pressure in your tires could have more effect then a .01 difference in gear ratio.

    Rene

    [​IMG]
     
  6. '73 K5

    '73 K5 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    Rene is right. I have 4.09's in the front and 4.11's in the rear of my truck right now and its fine. You only use 4 wheel drive when there is slippage right? Like mud or snow, etc. Thats why it won't matter. If you used 4 wheel drive on dry pavement, then it might matter.
    I've seen guys run 4.10's in the front and 4.56's in the back before. They only engage 4 wheel drive in deep mud and they say it helps to keep the frontend from digging down so much.

    '73 K5
    Chevy good...Ford bad
     
  7. Gandolf

    Gandolf 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    There is a good article about this at Randy's Ring and Pinion.

    http://www.ring-pinion.com/Gear Talk/Myths.html

    Randy's home page <A target="_blank" HREF=http://www.ring-pinion.com/>http://www.ring-pinion.com/</A>


    '89 K5 Silverado 4" lift w/BFG 33's
     
  8. Gandolf

    Gandolf 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    The first link didn't work due to the server deleting the % symbol inside the URL. It also wouldn't let me Edit.

    So go the Randy's Ring and Pinion Home Page, click on Gear Talk, then click on Myths Regarding Diffs.

    <A target="_blank" HREF=http://www.ring-pinion.com/>http://www.ring-pinion.com/</A>


    '89 K5 Silverado 4" lift w/BFG 33's
     
  9. HarryH3

    HarryH3 1 ton status Author

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    Re: Will 4.11\'s work with 4.10\'s?

    It'll work just fine. Many rigs come with slightly different ratios between the front and back. Every time I've seen it, it's been because one axle was made by one manufacturer, while the other axle was made by someone else. (Like the K5's with a GM Corporate 12-bolt in the back and a Dana 44 up front). That tiny difference it too little to notice off road.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  10. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    There is really no difference between 4.10 and 4.11 gears. The only reason there are slightly different ratios like this is that different axle designs require a different combination of ring gear teeth vs. pinion gear teeth to get the approximate ratio. As already mentioned, differences in air pressure, wear, or manufacturing tolerances of the front and rear tires usually cause more of a difference than that.
     
  11. nyyef

    nyyef 1/2 ton status

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    Re: Will 4.11\'s work with 4.10\'s?

    i thought it was because the diffs have different diameter ring gears, they couldnt get the exact teeth combo hence they couldnt the exact ratio.....or something

    Knife.
    knife.coloradok5.com
     

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