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torsion bars adjustment

Discussion in 'Chevy Trucks' started by samjr, Jan 2, 2015.

  1. samjr

    samjr Senior Member
    Messages: 481

    i just got my torsion bars turned up today the guy said he did 5 full turns is that too much 8.5 EZ-V on a gmc 2007.5 NBS D-max. I got Firestone air shocks in there too but i thought the plow was too much just for air shocks
  2. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,288

    Mine have been turned 5 turns for 7 years now with a set of timbres
  3. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,288

    I run a straight Fisher 8 foot minute mount 2
  4. bolake

    bolake Senior Member
    Messages: 125

    Boss dealer that installed my VXT turn mine up 4 turns, said thats the limit without changing alignment. There will be some that say any change in torsion requires realignment but thats what I found out.
  5. South Seneca

    South Seneca Senior Member
    Messages: 474

    I took mine up 3 1/2 turns, and put Timbrens in 3 years ago. No problems with tire wear. I'm really pleased with the improvement in carrying the plow.
  6. leolkfrm

    leolkfrm PlowSite.com Addict
    Messages: 1,978

    don't forget to counter balance it
  7. Kuttingedge

    Kuttingedge Junior Member
    Messages: 26

    My 06 gmc torsion bars turned 10 times with an 8foot poly arctic plow
    And my 2012 duramax not turned at all with 8foot poly v plow... Not sure what's up with that....?
  8. BowTieDmax

    BowTieDmax Senior Member
    Messages: 152

    2011 - newer have much stronger bars and suspension. Holds a plow much better. Especially if it has a plow package. 2001-2010 trucks plow package made no difference on torsion bars,, 2011 newer have bigger bars with the plow package
  9. JAJA

    JAJA Member
    Messages: 73

    Are you sure cause I had heard that old nbs plow prep had next up torsion bars or something like that could be wrong just what I heard
  10. BowTieDmax

    BowTieDmax Senior Member
    Messages: 152

    All diesel bars are the same on 2001-2010 diesel trucks, doesn't matter on cab, bed, snow plow prep or 2500,3500
  11. k1768

    k1768 Senior Member
    from NJ
    Messages: 556

    FWIW... Front of my 2015 GMC2500HD w/ snow plow prep package and 7.5' BOSS hanging off the front barely drops at all with T-bars untouched.
  12. Kuttingedge

    Kuttingedge Junior Member
    Messages: 26

    My 2012 also...1/4 inch and that is with
    No ballast..does it help that it is a crew cab?
    My single cab has a bad rake if I have no weight in back
  13. k1768

    k1768 Senior Member
    from NJ
    Messages: 556

    CC would add more weight on the front and increase chance of needing to adjust bars I would think? I have a double cab long bed. No counterweight, but I did add 210# ballast directly over the wheel wells on both sides, so 420# total. Have not hooked up plow since.
  14. SMiller

    SMiller Member
    from IN
    Messages: 46

    You can crank the torsion bars all the way up, GM designed them with adjustability in mind and to keep you within the factory parameters. I usually do 6-10 turns when installing a plow.

    Timbrens are always a good idea.

    Air shocks are not needed, I would much prefer Bilstein shocks, don't forget the front shock spacer.
  15. jerpa

    jerpa Member
    Messages: 92

    You can still easily exceed the factory "z" height by turning the torsion bars. 4 turns on my 2013 2500HD took it slightly out of spec. Although I had an alignment done nothing else was too far out and it wasn't necessary. The owners manual does state you can adjust the torsion bars with no mention of a limit so if a warranty issue comes up they SHOULD cover it.