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New sound under the truck. Any help?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Kyle89K5, Nov 12, 2001.

  1. Kyle89K5

    Kyle89K5 1/2 ton status

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    Here'e the deal, after I did the axle swap and lift on my truck, I've started getting a strange new noise. it happens when I go over a large bump or dip in the road. it sounds like someone is under my truck with a ball ping hammer smacking the floorboard. The sound is roughly on the drivers side, between the firewall and the seat. Kinda towards the tranny tunnel. I've looked under my truck for HOURS and kind find squat that is loose or otherwise.

    any advice?
    thanks in advance for your help.

    Kyle
    89K5
     
  2. Sammy

    Sammy 1/2 ton status

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    How much lift did you put in? Sounds like a driveshaft problem.



    1988 K5 Blazer Silverado Grand GT in the Netherlands. "No it does not fit everywhere overhere, but after one pass through it will fit the next time"
     
  3. Kyle89K5

    Kyle89K5 1/2 ton status

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    4"
    How could it be a driveshaft problem?

    Kyle
    89K5
     
  4. Burbinator

    Burbinator 1/2 ton status

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    An aviator once wrote up a gripe on one of my aircraft that said "Radar indicator sounds like little man with hammer inside". It turned out to be a loose nut with improperly installed safety wire, vibrating at launch. My corrective action was "Took hammer away from little man". I'll tell you the same thing...LOL

    Seriously, it may be a shackle or leaf binding. Also might be the floor creaking with the new angles that the suspension generates now due to the lift. Just some thoughts...

    The learning curve is a toll road...ride with someone who has already paid!
    <a target="_blank" href=http://photos.yahoo.com/abshort1>U.S.S. Nimitz II</a>
     
  5. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    Between the fire wall and the seat sounds like a loose body mount.

    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>
     
  6. Kyle89K5

    Kyle89K5 1/2 ton status

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    The seat creaking thing crossed my mind. My floor was SERIOUSLY cracked out, I used several large peices of plte to reattach the seat, that might be the deal.

    Body mounts all look REAL good. As a matter of fact...they almost look TOO good. Everything is tight as far as I can tell.

    Confusing as hell....

    Kyle
    89K5
     
  7. Ddragggon

    Ddragggon 1/2 ton status

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    my 73 K20 suburban does that too... the difference is I Know its the body mounts being bad. I need to find some time, and some really tall jacks so I can replace all the body mounts. I don't have any real reason for not replacing them: I have the full body mount kit sitting in my room...

    good luck finding the lil man with a hammer.

    -Rich

    My truck isn't ugly, you have a skewed sense of beauty

    <font color=blue>2007 Ford XLS++ intrepid Ram Superduty 7000 R-type's suck</font color=blue>
     
  8. MudFrog

    MudFrog 1/2 ton status

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    I had the same problem and it turned out to be a bad tranny mount for me.

    89 K5 Silverado, 4", 33's, 3/4 ton axles
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I had to repair my floor a while back too. The welding of patches on the floor causes one small area of my floor to 'oil can'...feels like someone is hitting the floor under my feet with a hammer. I found the problem but it took a long time. Now that I know what it is I don't worry about it. I could always dent the floor a little in the offending area...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
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  10. four_by_ken

    four_by_ken 1/2 ton status

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    What the heck is 'oil canning'?

    Ken H.


    '85 K5 in process
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Kind of a buckling /flexing of the steel. Remember when oil didn't come in plastic containers? if you dented the can a little it would pop in and out and generally make a loud noise...

    Rene...old enough to remember oil in 'cans'[​IMG]



    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  12. Kyle89K5

    Kyle89K5 1/2 ton status

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    You may have hit on it right there. I'll play with that a little bit this evening.

    Thanks Rene.

    BTW, I remember those cans too, and I'm not that old. I just grew up in a refinery [​IMG]

    Kyle
    89K5
     
  13. 90K5

    90K5 1/2 ton status

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    I remember those cans...we have a can of Valvoline ATF in my garage...other than that, don't remember them though...

    90K5
     
  14. Thunder

    Thunder 3/4 ton status

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    Now I really feel old...................... I rember when oil came in glass bottles with screw on spouts.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze>http://coloradok5.com/gallery/Thunders-Blaze</a>
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  15. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    Check your front driveline hitting the y-pipe on the exhaust.. Thats what mine was on my 4 in lift...Dan

    If it ain't broke.......Don't fix it....
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