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High Horsepower Front Axle Swap Ideas

Discussion in 'Early CJ5 and CJ6 Tech' started by 66_Cj5_Explorer, Nov 3, 2019.

  1. Nov 8, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
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    Aug 13, 2015
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    AFAIK, all the CJs had the same width frame up front. The later ones got wider in the rear only. Not sure about YJs.

    The bigger the tire, the less room you have between the tire and frame for steering, the wider axle you need for full steering capability. If this is going to remain street legal, check with local tire stick-out laws before you commit to anything.

    If you go to a D60 and plan on using leaf springs, the sheer size (width) of the differential will create issues with driveshaft alignment. To keep enough room next to the casting for a leaf spring, the pinion gets placed closer to the center of the jeep. Be aware of this when planning. Transmission and oil pan clearances could become an issue.
     
    Jrobz23 and 66_Cj5_Explorer like this.
  2. Nov 8, 2019
    nickmil

    nickmil In mothballs. Sponsor

    Happy Valley, OR
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    This. If you are thinking of narrowing the closest that can be done is Wagoneer/Scout 2 width. The short side can only be shortened so much and therein lies the issue. I narrowed one for my CJ-6 that sits on a shortened Scout Terra frame and have about 3/4” between the inner “C” on the short side and the carrier where the tube goes in. Just enough room to weld it back together.
    And this is at Wagoneer/Scout 2 width. Forget about any idea of CJ width.
     
  3. Nov 9, 2019
    Keys5a

    Keys5a Sponsor Sponsor

    Florida Keys
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    Even with some big horsepower, I would be looking at building a narrowed 44. As stated above, the early Wagoneer and Scout ll axles are good donors to start with. The Scout has heavier spindles, but in a light CJ, shouldn't be a consideration. Just drive it with respect for the power! I've seen lots of mud bog race trucks running 44s successfully. Tire size, traction, and a heavy foot are what break things. Most front axles breaks I've been around have been in reverse when the front end is heavily loaded, like pulling out another stuck vehicle.
    -Donny
     
  4. Nov 9, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
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    If you want to go with a 44 I'd suggest a Roxor unit.- $1100 c/w brakes.

    [​IMG]

    19 spline but there are 30 spline upgrade kits ~$600.
     
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  5. Nov 10, 2019
    Keys5a

    Keys5a Sponsor Sponsor

    Florida Keys
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    Now thats a good idea if your time is valuable to you! Is anyone making aftermarket high-alloy axle shafts yet?
    -Donny
     
  6. Nov 10, 2019
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    Yes. RCVs are available too.

    It’s all basically within a fraction of inch of a NT30. Keep in mind the Roxor has YJ width springs.
     
  7. Nov 13, 2019 at 8:49 PM
    fhoehle

    fhoehle Sponsor Sponsor

    Harford Township, PA
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    I narrowed a Scout 44 for my CJ6 to regular narrow track width and run internal spline hubs on Chevy spindles and Ford Rotors. I have a 60 in the back but you can only imagine how much I drag that boat anchor around out back. I would really recommend the 44 for clearance.
     
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  8. Nov 17, 2019 at 8:23 AM
    fhoehle

    fhoehle Sponsor Sponsor

    Harford Township, PA
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    Apr 11, 2012
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    1100?! That's really reasonable.
     
    Jrobz23 likes this.

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