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Bad shaking/ vibration in a 04 LB7 ZF6, Dual Mass Flywheel or Engine?

Discussion in '01-04 LB7' started by GM Guy, May 7, 2016.

  1. btfarm

    btfarm 300,000 Worth Staff Member Moderator

    16,017
    1,285
    May 12, 2008
    Sandwich, Illinois
    Sooner or later the ZF6 and/or the clutch will be causing you grief. But it's unique for a while. ;-)
     
  2. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,474
    1,538
    May 9, 2008
    ZEPHYRHILLS FL
    I know you got the 06, I'm just saying I wouldn't get another one with a ZF in it. They're like women, they can be fun at first, but you can expect monthly hiccups, high costs down the road, and the eventual urge to kill it.
     
  3. tanman_2006

    tanman_2006 Just a farm kid...

    5,447
    448
    Feb 15, 2010
    Seiling, Oklahoma
    If you get an 06-07 lbz with 6 speed Allison with grade braking tune you will completely rethink the zf6 decision. Its a very nice unit.
     
  4. GM Guy

    GM Guy Manual Trans. 2WD Enthusiast

    4,606
    379
    May 6, 2008
    NW Kansas and SC Idaho
    I got to drive a buddy's 06 LBZ/Ally to California loaded to about 16-18K, and thoroughly enjoyed it...for an automatic. :) but the mpg sucked, we only got around 10 mpg.

    As good as the Allison is, I gotta do my own shifting, so this is just the way things are. :) Manual transmission loyal to a fault. :)

    I think most of the ZF6 issues are guys that turn them up, I think with stock power and some PTO covers with more capacity, she will be fine.
     
  5. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,474
    1,538
    May 9, 2008
    ZEPHYRHILLS FL
    More stockers failed than ones turned up. And I would GURANTEE you that a ZF truck wouldn't have gotten enough better MPG to have noticed. I know personnal preference is one thing, but I don't see in wasting money to do so. It would be one thing if we were talking about a DODGE slushbox, but were not.
     
  6. tanman_2006

    tanman_2006 Just a farm kid...

    5,447
    448
    Feb 15, 2010
    Seiling, Oklahoma
    Temperature isn't the biggest killer, that will help some but you still have to over come the weak clutch and cheaply made Synchro's that cost at least your left nut to replace.
     

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