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Con-Ferr rear axle truss mounting questions...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by txbartman, Aug 31, 2001.

  1. txbartman

    txbartman 1/2 ton status

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    I just bought a used rear Con-ferr axle truss. I have never used or installed one of these before. I got two perches that appear as though they sit under the axle, two new u-bolts for mounting the perches, and the truss bar itself.

    I noticed the bar has two nuts on each end. I am assuming one goes on the inside of the perch and the other on the outside to essentially clamp the truss onto them. But, where do the perches mount? Should they mount outside my spring u-bolts, i.e. between the springs and the hubs? Or do they mount inside the shock mounts? Seems to me this would be too close together. And I assume I tighten the outer nut first then lock the truss into place by tightening the inner nut up against it. But how tight do I tighetn the outer nut? As tight as I can? Or is there a torq spec?

    Any help would be greatly appreciated.

    Brian
    Click to see <a target="_blank" href=http://tx85gmcguy.alloffroad.com> My 85 Jimmy </a>
    Who put a stop payment on my reality check?!?
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    I had one on my 12bolt when I twisted and cracked and granaded the axel. That damn truss was the ONLY reason I was able to drive for 6 1/2hrs in front wheel drive. It literally held the axel tubes in the pumkin!!

    To answer your ?? you want the ends of the truss to goto the outer most mounting location, as close to the tire you can get it. You will get a good feel for how it sinchess up to the axel when you get it loosly mounted. The best way to start is to put the truss on your floor jack and jack the truss up under the pumkin. Make sure you get the middle centerd so it doesn't hurt any of your diff cover bolts then just pump the jack a bit so the truss is nice and tight against the bottom of your pumkin then locate the shackes as far out as possable and tightin each side evenly! a little on the left then a little on the right back and forth till the truss is nice and snug.
    hope this helps....

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
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  3. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    I did it just like that but when I jacked the truss up under the dif I got the back tires off the ground and then cranked it down to get sort of a preload on it.One thing about trusses is that there not rock friendly.The skid plate part is cool but there more like an anchor some times.I dont know how much good mine is doing now cuz the bars are all mangled and bent up almost to the axle tube.

    A balanced diet is a beer in both hands.<a target="_blank" href=http://community.webshots.com/user/beaterwhang>community.webshots.com/user/beaterwhang</a>
     
  4. 85m1009

    85m1009 1/2 ton status

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    That is the exact reason I starting building my own trusses. Check them out, you can own one too.
    <a target="_blank" href=http://www.mooffroadoutfitters.rockcrawler.com>www.mooffroadoutfitters.rockcrawler.com</a>

    <font color=green>Steve Frisbie</font color=green>
     

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