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Commando Springs On A Cj?

Discussion in 'Early CJ5 and CJ6 Tech' started by colojeepguy, Nov 17, 2023.

  1. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    I've been thinking about softer riding springs for my CJ. My Commando rides like a Caddy compared to the CJ. I know this is an apples/oranges comparison, as the Commando has 50 year old stock springs + a longer wheelbase, but I feel like the spring configuration would be a big benefit too. The front JC springs are 2" wide, and the center pin is offset- the distance from the axle to the front is the same as a CJ, but the distance to the rear is about 5" longer. The rears are also offset, by a bunch. The distance from the axle to the front of the spring is about 21" but to the rear is 31.5". I think I could turn these around and make them work on a CJ.
    Obviously I'd have to replace all 8 spring hangars but it seems like using these springs with the offset would avoid a lot of the fab work involved with a YJ spring swap...kinda like the old Holbrook springs.
    Has anyone ever put Commando springs on a CJ? Problems? Thoughts?
    20231117_113311.jpg 20231117_114729.jpg
     
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  2. Nov 17, 2023
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    I've never had softer riding springs on a CJ but I'd be afraid of it being too "tipsy" on turns and such. :shrug:
     
  3. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    The Commando corners like a hay wagon even at stock height :lol:
     
  4. Nov 17, 2023
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    The longer length to the middle of the rig from the center pin is exactly what the Holbrook Long Leaf's do. The Holbrooks keep the 1.75" width, but no reason to not go 2" and that is much like the other conversions do it.

    Edit - I have a set for the CJ5 in the shed. I could get you measurements if you wanted to see if the guy in town is building custom springs again.
     
  5. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    Thats a possibility too, that would save a lot of work changing the spring hangars at the shackle end. I could always get a custom set from Alcan, I don't think Rocky Mountain Spring is building springs.
     
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  6. Nov 17, 2023
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

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    Sounds like you’re trying to reinvent the wheel when YJ springs have solved a lot of those issues.

    I’m a huge non-fan of Holbrook-style springs. The longer spring section in the middle of the vehicle makes zero sense from a spring geometry standpoint. It would wreak havoc on driveline angles and roll center. How many production vehicles have you seen with that setup?

    I’d look into a YJ swap before going that route.
     
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  7. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    If you're talking about the leaf springs with the offset center pin, that's literally how the Commando is set up, see my original post.
    As for YJ springs, I simply don't have the fab skills for the frame mods required to do it. I was interested in the Rocky Road kit, but have read about the problems with it so I won't be going that route.
     
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  8. Nov 17, 2023
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

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    Yeah, the long section is behind the axle. Spinning it around changes everything.
     
  9. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    So, having both of the long sections towards the center of the vehicle will give adverse handling?
     
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  10. Nov 17, 2023
    Glenn

    Glenn Kinda grumpy old man Staff Member

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    That's interesting, I didn't realize the Commando springs are like that.
     
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  11. Nov 17, 2023
    Rich M.

    Rich M. Shoe salesman 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    It's common for flatfender guys to run the longer rear springs up front. I've been told by several passengers that my Jeep rides fairly good.
    Personally I'd try messing with mixing and matching spring packs before getting too deep in mods. Oh and reverse your shackles ( ducks)
     
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  12. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    If I had the skills to do that, I could probably figure out a YJ swap too.
     
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  13. Nov 17, 2023
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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    You just said you have been around old jeeps your whole life. You can do the work no problem. I am very novice and handling the YJ spring shackle reversal with not many issues. It’s a lot of work but it’s a long winter.
     
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  14. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    Yeah I have been but never done anything like a YJ swap. Way out of my wheel house....
     
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  15. Nov 17, 2023
    Rich M.

    Rich M. Shoe salesman 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Very easy to copy the m38a1/ early 5. I have the dimensions documented.
     
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  16. Nov 17, 2023
    garage gnome

    garage gnome ECJ5 welder

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    There is a kit to put yj springs in a cj5.
     
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  17. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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  18. Nov 17, 2023
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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  19. Nov 17, 2023
    colojeepguy

    colojeepguy Colorado Springs

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    Obviously it didn't work out well for you?
    I've read of others having problems too..
     
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  20. Nov 17, 2023
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

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    If I felt the necessity of putting YJ springs on, I would do my own version with off the shelf or hand built parts. This would
    give you better control over the finished product.
     
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