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Replacing Rear Crossmember

Discussion in 'Intermediate CJ-5/6/7/8' started by HarvestGold, Nov 29, 2021.

  1. Nov 29, 2021
    HarvestGold

    HarvestGold New Member

    Nebraska
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    Nov 13, 2020
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    38
    I've been working on the frame of my '74 CJ-5, getting it ready for paint, and I bought a replacement rear crossmember (Omix-Ada part 12027.01) to replace the rusted-out original.

    The new crossmember appears to be about 1/8" too narrow on the inside to fit over the end of the frame. Not sure how to proceed. I am considering heating the frame with a torch to narrow it slightly on the end, but I don't really want to change the factory dimensions.
     
  2. Nov 29, 2021
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
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    I'm working on mine and had the same problem. I spread the crossmember with my BFH. It didn't take much. a little on top a little on bottom. Mine isnt a "restoration" so other modifications as well. the crossmember will go between these parts and the new bumper welded to the outside parts. All will be removable with 1" grade 8 bolts.

    [​IMG]
     
  3. Nov 29, 2021
    dnb71R2

    dnb71R2 SuperDave 2023 Sponsor

    Grand Mesa, CO
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    In my opinion, if you are within 1/8" of factory dimensions, you are GOOD TO GO. Squeeze it together, heat it or use the BFH to adjust 'whatever'!
    I don't think the factory maintained close tolerances during the manufacture of these Jeeps!
     
  4. Nov 29, 2021
    sterlclan

    sterlclan Member 2024 Sponsor 2022 Sponsor

    exploring the...
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    the factory wasnt that close + or- 1/2 in the old frame books...
     
  5. Nov 29, 2021
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    This sounds to me like the Omix part is too narrow compared to the original. Quality of the Omix parts seems to be uniformly ... disappointing. I will measure my cross member width in the morning, and you can compare. This is not a dimension I would expect to vary a lot from the factory.

    Classic Enterprises sells this part, and I'd bet their part will fit. https://www.classicent.com/products/jeep-crossmember-rear-frame-1951-1975
     
  6. Nov 29, 2021
    Chilly

    Chilly Active Member

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    Had an Omix. Didn't use it.

    Bought from Classic. Installed it.

    Classic beats Omix.
     
    dnb71R2 and wheelie like this.
  7. Nov 30, 2021
    HarvestGold

    HarvestGold New Member

    Nebraska
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    Nov 13, 2020
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    I think you're right. I ended up using the BF vise to widen the rear crossmember.
     
  8. Nov 30, 2021
    HarvestGold

    HarvestGold New Member

    Nebraska
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    Nov 13, 2020
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    I certainly wish I had seen that part earlier haha. I like that you can even get it with the stiffener.
     
  9. Nov 30, 2021
    Lockman

    Lockman OK.....Now I Get It . 2024 Sponsor 2023 Sponsor 2022 Sponsor

    SilverHill,Carolina
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    No worries. you don't need heat . If you don't' have a Porta Power, wrap a come along cable around each side . That'll pull it into place
     
    dnb71R2 likes this.
  10. Dec 6, 2021
    rusty72cj5

    rusty72cj5 Member

    Florida
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    Jan 24, 2017
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    Got mine from Classic as well. No problems at all. Fit perfectly on my ‘72.
     
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