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Frame/Body flex -- bent the body

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by jcg, Oct 6, 2000.

  1. jcg

    jcg 1/2 ton status

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    I was on some pretty flexy trails last weekend with the top and swaybar off and one of my bedsides got a little tweaked. The right side is bent out about 1/4". The gate dropped open on one of the obstacles so I'm assuming this is when it bent the body. I can see a small crease in the tailpan support over the right frame rail. There's no serious rust in there so I wouldn't think this would bend very easily. This was the first time I ever had the swaybar disconnected and I didn't even think about bracing the bed. I never noticed it was bent until the top wouldn't line up the next day. Has anyone had this problem before? I'm going to build a brace to put across the bed when I go wheeling from now on but if anyone has any other ideas I'd like to here em.

    Joe
    RIT Mini-Baja http://www.rit.edu/~bajawww
    Team Mudnuts http://www.mudnuts.org
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    A friend of mine installed a piece of pipe at the top of the bed rails right along the back of the back seat from one side to the other. He made it bolt on instead of welding it. That way its not in the way of anything and you could also run a diagonal brace off of that and triangulate it.
    I know when I ramped my truck recently I could see quite a lot of flex in the body.
    Hey was it you that had the friend with the big red K5 on 44's thats been in a couple of mags? If it is have a look at what he did to the front of his truck. I believe he had a custom single body mount under the rad support that prevented the body from flexing and breaking stuff.

    Rene

    [​IMG]
     
  3. jcg

    jcg 1/2 ton status

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    I never thought I would have that much flex, but Rob's single core support is starting to look like a pretty good idea. I forgot to mention that one of my core supports tore apart. All the body mounts are poly but I haven't had time to swap the front yet and I found the rubber from the passenger side one hanging in the breeze. I've been thinking about the bed brace quite a bit and I think I'm going to make one that replaces the tailgate with a spare tire carrier, sort of like on race trucks. It would be functional and look pretty damn cool.

    Joe
    RIT Mini-Baja http://www.rit.edu/~bajawww
    Team Mudnuts http://www.mudnuts.org
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Yeah they flex quite a bit. You should see how much flex they have without the hard top like my 75. To be quite honest I feel that there is less stress being put on the frame and body without the sway on it. The core suport bushings blowing out is quite common. I have seen another neat trick on a truck in the mags where there was a 71 Truck where the guy replaced the core support bolts with longer ones and then used a spring instead of the lower bushing. It was a pretty neat set up. I scrapped my tail gate long ago and built a barn door set up with braces built in to help prevent the bed from spreading.

    Diging it in the dirt with my K5's
    Grim-Reaper
    http://grimsk5s.coloradok5.com/
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Yeah when I saw what Rob did to his Blazer with the front core support mount it had me scatching my head for a bit (the pic was'nt that clear) but after re-reading it a bit I thought that was a damn fine idea![​IMG]
    What I liked about my friends support brace was that it was well hidden and did'nt obstruct rear access or rear passenger comfort. It also works very well.
    I've also seen corner gussets at the tailgate area, they also work but if you use the cargo area for stuff they can get in the way. The rear of my truck is so rotted I think it just flexes away and lets a few more rust chunks fall off instead of kinking [​IMG]. Now that I found a rust free rear section I may have to rethink the flex/body issue.

    Rene

    [​IMG]
     
  6. jcg

    jcg 1/2 ton status

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    I've seen the spring idea too, one of the guys in my club has them on his ranger. I think I might do that on mine since I have to replace the core supports pretty soon. If I ever get the time to put in my cage that will help stiffen everything up quite a bit too.

    Joe
    RIT Mini-Baja http://www.rit.edu/~bajawww
    Team Mudnuts http://www.mudnuts.org
     

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