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View Poll Results: 609 Strong Enough

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  • Yay

    4 80.00%
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Thread: 609 Axle Strong Enough

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  1. #1
    Join Date
    Nov 2008
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    Edgewood
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    Default 609 Axle Strong Enough

    to handle 42" tires and a 4.6 stroked 4.0 motor? AW-4 trans and 3.8 to 1 Atlas, probably 5.38 in the diffs.
    I am the reason I can't have nice things
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  2. #2
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    piece of cake if built correctly, ie.. 35 spl axles, nodular case or even better-aftermarket alum with thrust bolt & 'daytona' bearing retainer, forged yoke.
    the bad!--locker 'space' is limited -small, spool solves the strength issue, but suck in a front end. ARB or YUKON grizzly work well.

    not interested in using the stock 60 center section? shaved its not much bigger than a 9, just heavier! or you could put 10" gears in the 9" housing or.... now you got me going!!

  3. #3
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    Sorry...

    Good info, didn't think about the limited locker space. I am trying to keep things as light as possible, but want to be strong too.
    I am the reason I can't have nice things
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    GenRight Mark
    Route 66 Off Road.com

  4. #4
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    Nov 2008
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    10" gears, some big ole 40+ spline gun drilled shafts...

    Yes.
    "HALFAST DESERT RACING"
    2004 Dodge Cummins, KORE Race, 2.5" Fox's, Deavers, Glassworks, 37" Toyos, Walker Beadlocks, Tire Gate, Billet Goerend, Smarty TNT/EZ/FIPK2/5", Lots of HID's, Turbonetics ball bearing turbo
    1995 Ranger, 2.5" kings, Giant beams, giant 4 link, giant engine cage, Fiberwerx body, cage, ODR race truck.
    1979 and 1980 ramchargers in the process of merging with a 1993 VE cummins/518/205/60/14B.
    1974 Power Wagon on 40's, 1977 Power Wagon Macho
    2002 WJ 4.7HO Quadra-Drive

  5. #5
    Join Date
    Apr 2011
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    Do you already have the axles?? Its a lot of tire and torque throwing down to the ground. Will be curious to see what gives first. Build it stout and upgrade after you find out weak links you have. Good luck with the build.
    Quote Originally Posted by Fleg View Post
    The original Hover Jeep is still hovering!!

  6. #6
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    Aug 2014
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    As Curtis said, it depends a lot on how you build it. With a 9", the sky is pretty much the limit with all of the aftermarket support out there, the only limitation is the depths of your pockets. I think for practical purposes, 35 spline axles (inners and outers) with good U-joints (Ox, CTM, etc...), drive flanges (you might be able to get by with good hubs), and an ARB air locker or a spool. From testing I have read about and personal experience, I believe ARBs are the strongest diff short of a full spool, and with a 9" running 42" tires, it will matter. The only issue I have seen with ARBs is the air system. It would probably be a good idea to get an upgraded third member, but I have not heard of many failures. As for 10" gears, I don't believe they are necessary. I would wager that the 9" gear sets are stronger than Dana 60 gear sets (all else being equal) due to the much larger hypoid offset, third pinion support bearing, and the wider face on the ring gear (which is what makes the differential carrier relatively weak compared to a Dana 60).

    I don't remember this gentleman's name, but he was running a 9" front with 43" SXs down in Las Cruces. I remember talking to him a while back, and he only had good things to say about the front axle.HPIM0679.jpg

  7. #7
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    Still thinking on this, I am wanting to be light, but my pocket is also a big factor.
    I am the reason I can't have nice things
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    GenRight Mark
    Route 66 Off Road.com

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