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Thread: 1st gen 4wd suspension knocking..

  1. #1
    IlluSive XpecTaionS l1ld3v1lrydr's Avatar
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    1st gen 4wd suspension knocking..

    i have a 1st gen 4wd, 4 dr, its been lowered 4inches for the past 5 years with no isssues. but lately its been hammering really hard on bumps. almost like somethings loose. it almost sounds like the noise a car with bad struts sounds like.


    i have no idea what it is, shocks look to be good. everything seems tight. ball joints arent bad or anything.


    i can hear when i come up my driveway and i always open the door to listen to see if i can hear where its coming from. both sides do it, almost sounds like something with the torsion bars. but is there anything with those that can go bad that would need replaced?
    :tongue: w1shf00l th1nk1n' :boink:

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  2. #2
    5.7L VORTEC 350 blazin4low's Avatar
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    i would double check your ball joints......we had an el camino that did the samething and it was the ball joints.......if you have a curb to your driveway have someone drive up and down the curb as you watch the spindle.......i could see the spindle rock back and forth

    I think it's time for me to change my steering linkage and lower ball joints
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  3. #3
    spoonman31
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    4wd knocking

    torsion bar mounts they can go bad on these blazers over night

  4. #4
    IlluSive XpecTaionS l1ld3v1lrydr's Avatar
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    its not the ball joints. their all only a year old, plus i checked them tonight when i had the blazer jacked up looking underneath. and the steering linkage, as well as inner/outer tie rods, and idler arm and pitment arms were replaced the same time my ball joints were.
    :tongue: w1shf00l th1nk1n' :boink:

    4 door love... or... love-in the 4 door... :bigthumb:



  5. #5
    IlluSive XpecTaionS l1ld3v1lrydr's Avatar
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    bump, any other ideas on things to look for?
    :tongue: w1shf00l th1nk1n' :boink:

    4 door love... or... love-in the 4 door... :bigthumb:



  6. #6
    Registered User MasterPod's Avatar
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    check the mounts that hold up the exhaust. This was what happened on my daily driver

  7. #7
    Registered User natedogg's Avatar
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    torsion bar cross member

    Did you check the torsion bar cross member it could be lose but it is hard to tell becouse the bars keep tention on it. Or mabey a trany mount. Just some ideas.
    See you on the ground

  8. #8
    IlluSive XpecTaionS l1ld3v1lrydr's Avatar
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    i looked under it the other day but didnt see anything.


    i dont think its the tranny mount because one time the noise will be on the pass side, the next on the driver side.


    and i have the bolts back out on the x member for the torsion bars. theyr not all the way out, but idk how they could be "loose" with pressure being on them all the time. ive read of guys removing the bolts completely with no problems.
    :tongue: w1shf00l th1nk1n' :boink:

    4 door love... or... love-in the 4 door... :bigthumb:



  9. #9
    Registered User new guy's Avatar
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    Quote Originally Posted by MasterPod View Post
    check the mounts that hold up the exhaust. This was what happened on my daily driver
    you have to check the exhaust thats what is sounds like to me too.

  10. #10
    Zombie Killer 6SpeedBlazer's Avatar
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    Quote Originally Posted by spoonman31 View Post
    torsion bar mounts they can go bad on these blazers over night
    agreed, this is most likely the problem

  11. #11
    IlluSive XpecTaionS l1ld3v1lrydr's Avatar
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    thats what it sounds like it could or would be...


    which end of the bar are they on? and how much of a PITA are they to replace? lol
    :tongue: w1shf00l th1nk1n' :boink:

    4 door love... or... love-in the 4 door... :bigthumb:



  12. #12
    Registered User natedogg's Avatar
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    bolts

    Quote Originally Posted by l1ld3v1lrydr View Post
    i looked under it the other day but didnt see anything.


    i dont think its the tranny mount because one time the noise will be on the pass side, the next on the driver side.


    and i have the bolts back out on the x member for the torsion bars. theyr not all the way out, but idk how they could be "loose" with pressure being on them all the time. ive read of guys removing the bolts completely with no problems.
    i ment the bolts that hold the crossmember to the frame.
    Last edited by natedogg; 03-19-2010 at 09:31 PM.
    See you on the ground

  13. #13
    spoonman31
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    knocking

    they r not hard to replace but the r discontinued from gm and not to many parts stores know what they r also keep in mind to check the ball joints you have to jack the truck up under the control arm you cant tell if they r worn with the suspension hangin how ever the torsion bar mounts are more likely the problem

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