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dually spring question.

Discussion in 'GM 6.5 Diesel Engines' started by ak diesel driver, May 14, 2018.

  1. ak diesel driver

    ak diesel driver 6.5 driver

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    Feb 7, 2009
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    So I'd like to know if other duallys have the same rear springs as mine.
    They're actually kinda irritating. They're kind of a progressive spring set up as the initial springs are soft enough that I'm constantly bumping into the main spring pack. So it feels really clunky. Doesn't seem right to me.
     
  2. Twisted Steel Performance

    Twisted Steel Performance Formerly: sctrailrider Vendor

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    post a pic, sounds like what mine has.. and yes it's clunky but it's built to be loaded..
     
  3. Will L.

    Will L. Well-Known Member

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    2-2links and air bags! DO IT! Ya know ya wanna!

    Ride great empty or loaded.
     
    Husker6.5 likes this.
  4. Jaryd

    Jaryd Oh the sound a 6.5 makes

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    Hodges, SC
    My single wheel 3500 feels the same way. Especially when I turn off the paved road onto my driveway.
     
  5. ak diesel driver

    ak diesel driver 6.5 driver

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    Yeah if my truck was a pavement queen it wouldn't bug me so much
     
  6. NVW

    NVW Well-Known Member

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    My 3500 was on the overloads with the bale deck, rode rough. Put on air bags and the ride was much better until they gave out. I had 3250 lb leafs put in, regular were 2750 lb. Raised my back end up 4", with the deck on it is my nicest riding vehicle now.
     
  7. Twisted Steel Performance

    Twisted Steel Performance Formerly: sctrailrider Vendor

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    Looks like mine but mine doesn't sit on the overload spring empty..

    And I have air bags to be installed when ever I find the time tho I doubt that will do much empty as they hold 5psi empty.. probably make it bounce then..
     
  8. ak diesel driver

    ak diesel driver 6.5 driver

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    mine doesn't touch in the front but seems to in the rear. how much space do you have?
     
  9. Twisted Steel Performance

    Twisted Steel Performance Formerly: sctrailrider Vendor

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    Jan 15, 2012
    Pauline, SC
    On level ground I have 1 1/2 " clearance on the rear..
     
  10. Twisted Steel Performance

    Twisted Steel Performance Formerly: sctrailrider Vendor

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    Jan 15, 2012
    Pauline, SC
    I'll need to look tomorrow, it's sitting in the barn and it's poring rain now... seems like it's about the same but my old timers doesn't remember..
     
  11. ak diesel driver

    ak diesel driver 6.5 driver

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    Feb 7, 2009
    alaska
    so even empty I have my lumber rack on the back it weighs 300ish
     
  12. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

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    ZEPHYRHILLS FL
    Sounds like your main pack has softened up and sagging some on you. I would expect to see close to 1-1.5 inches of clearance on the overloads and the bumpers. Maybe you could add a set of timbrens to help soften things up a bit. Otherwise remove the overload spring and install bags to deal with overload.
     
  13. ak diesel driver

    ak diesel driver 6.5 driver

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    Hmm. Definitely don't want bags. I've never seen timbren's used on the rear. Might look into that.
     
  14. Will L.

    Will L. Well-Known Member

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    I used to sell and install timbrens and air bag helpers and air bag stand alone.
    When I said air bags i did not mean air helpers.

    Stand alone Air bags always give the best ride, safest, highest load capacity. But it is the most expensive way to go.

    Timbrens are better than air bag helpers for construction workers, service trucks, etc. because of the set it and forget it usage. Timbrens KILL coil over helper springs in comparison. I will never recommend helper coil overs ever again after learning of timbrens.

    If its a daily driver where comfort comes into play, the airbags win. More pricey and maintenance than timbrens.

    The real advantage of airbags is if they not going to be maxed out all the time you can soften the springs and get easier deflection and a better ride from it because the spring effect is lessened. Consider semi trailers. If they haul normal loads then the are springs. As soon as the trailer is hauling anything easily damaged like audio visual equipment for tv, movie, etc production ONLY air ride will do. Whenever it is an expensive load or vibration is an issue, air ride is paid extra for.

    Another option is something like calvert or rancho adjustable shocks at the same time. Pricey as hell, but nice results. You can have spring or airbag with more travel which allows absorbing more impact at quicker rate and can adjust it shocks to dampen at desired rate. Most use the dial on shock type and just learn 2 settings of empty rig, and heavy load. Others that are willing to spend a lot more get the dial on the dash and can change based on what they feel that day.
    Wish I could afford those for mine, they are amazing.
     
  15. Twisted Steel Performance

    Twisted Steel Performance Formerly: sctrailrider Vendor

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    Jan 15, 2012
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    I have 1 1/2" front & rear at the overload bumpers.

    The air bags are Firestone and are self adjusting per loaded weight.

    The bags are big truck style and are quality looking, I had a set on my 2500 and loved them.

    The directions didn't say to remove the big top spring but that might soften & quite the empty ride some.. could just torch them and leave the pack bolted together I guess, may look into that when I install the kit.
     
  16. ak diesel driver

    ak diesel driver 6.5 driver

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    Feb 7, 2009
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    So if I have uneven gaps front to rear do I have an issue that needs to be addressed? Didn't notice any broken leafs. Maybe the back side of the pack is fatigued more?
     
  17. Twisted Steel Performance

    Twisted Steel Performance Formerly: sctrailrider Vendor

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    Pauline, SC
    Other than a lumpy ride I wouldn't think it will hurt anything.
    Sounds like the spring pack is weak is all..
    May not be worth the cost of replacing the springs & ubolts, that would be up to you..
     
  18. Will L.

    Will L. Well-Known Member

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    Boulder City Nv
    It concearns me enough I want to hassle you for pictures- good ones - that I am going to look at on my 65” hd tv when you post them.

    If I wasn’t sure you wouldn’t load it heavy, drive on rough road, and drive in some remote places- probably could just say your ok without seeing it too. But... humor me. Take some pics,’please.
     
    Husker6.5 likes this.

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