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Thread: stock rearend causing lunging from side to side?

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  1. #1
    Join Date
    Feb 2007
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    stock rearend causing lunging from side to side?

    when i get on it sometimes my truck will feel like its rocking back and forth, usually at like 50+ mph or so. it doesnt do it everytime though. usually its not getting traction until i get well into second gear.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  2. #2
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    Dec 2006
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    Saginaw, Texas
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    my dads truck did that and we found the u-bolts that hold the rearend to the springs were loose. we got everything lined back up and tighened and the problem went away.. on another truck one of the bushings for the leaf spring where it mounts was worn out and gone which caused the same issue... i dont think it has anytihng really to do with the guts but i cold be wrong all your new found power could be killing the rearend...lol time to get the dana's in...
    I am gonna be a new Daddy...

    Drive it like you live hard and fast....
    '91 rcsb, 4.3 V6, 700R4 trans swap, 4/6 drop rolling on 18's, roll pan, 2" cowl hood, electric fan, TBI injector spacer, K&N filter replacement, flowmaster muffler...



    [Today 08:09 AM] ChevyLee: dale would make a awesome dad in law too

  3. #3
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    i will check all that stuff and see if i can find anything.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  4. #4
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    i cant tell if the leaf spring bushings are worn but everything else seems ok. it feels like the power is being transfered from one rear wheel then to the other.
    freaking truck is scary when you nail it though.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  5. #5
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    Dec 2006
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    Saginaw, Texas
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    does your truck have an open rear or the g-80 unit?
    I am gonna be a new Daddy...

    Drive it like you live hard and fast....
    '91 rcsb, 4.3 V6, 700R4 trans swap, 4/6 drop rolling on 18's, roll pan, 2" cowl hood, electric fan, TBI injector spacer, K&N filter replacement, flowmaster muffler...



    [Today 08:09 AM] ChevyLee: dale would make a awesome dad in law too

  6. #6
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    Quote Originally Posted by outlaw_king View Post
    does your truck have an open rear or the g-80 unit?
    how do i tell the difference?
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  7. #7
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    Dec 2003
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    Azle,TX
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    3,682
    When you do a burnout,does one wheel spin or both...if only one spins ,the truck is transferring weight from side to side and gettin squirrly..my wifes truck does that

  8. #8
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    Quote Originally Posted by COWL327 View Post
    When you do a burnout,does one wheel spin or both...if only one spins ,the truck is transferring weight from side to side and gettin squirrly..my wifes truck does that
    i think that is exactly what is happening
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  9. #9
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    Dec 2006
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    Saginaw, Texas
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    you plan on putting in dana 60's right? that will solve your issues when you put those in.
    I am gonna be a new Daddy...

    Drive it like you live hard and fast....
    '91 rcsb, 4.3 V6, 700R4 trans swap, 4/6 drop rolling on 18's, roll pan, 2" cowl hood, electric fan, TBI injector spacer, K&N filter replacement, flowmaster muffler...



    [Today 08:09 AM] ChevyLee: dale would make a awesome dad in law too

  10. #10
    Join Date
    Feb 2007
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    Sallisaw OK
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    Quote Originally Posted by outlaw_king View Post
    you plan on putting in dana 60's right? that will solve your issues when you put those in.
    yeah solid axel swap with 60's and about 6" of lift so i can still use it on the road also.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

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