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Thread: jumping lanes

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    New Guy
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    jumping lanes

    hi i have a 69 g20 and when i hit a bump in the road it wants to jump lanes on me. Does anyone know what cause this? thanks

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    VCVC Member jrinaman's Avatar
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    how does it handle otherwise? does it wander, does it track okay, steering wheel self center, how much play in steering, etc. it could be any number of things and I fixed/replaced them all before finding my rear spring wasnt securely attached to frame. yes, a bump in the road or a semi passing me would instantly throw me out of my lane
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    Quote Originally Posted by jrinaman View Post
    how does it handle otherwise? does it wander, does it track okay, steering wheel self center, how much play in steering, etc. it could be any number of things and I fixed/replaced them all before finding my rear spring wasnt securely attached to frame. yes, a bump in the road or a semi passing me would instantly throw me out of my lane
    it does wander a little bit. and it does have play in the wheel.

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    VCVC Member jrinaman's Avatar
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    have someone gently rock the wheel back and forth while you look for play in the tie rods, drag link and king pins. also not how far you turn wheel before pitman arm moves. very common to need steering box adjusted.
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    Quote Originally Posted by jrinaman View Post
    have someone gently rock the wheel back and forth while you look for play in the tie rods, drag link and king pins. also not how far you turn wheel before pitman arm moves. very common to need steering box adjusted.
    Ok thank you i will check those parts first. I appreciate all the help i have got from this group.

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    VCVC Charter Member Vanner68's Avatar
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    Quote Originally Posted by jrinaman View Post
    how does it handle otherwise? does it wander, does it track okay, steering wheel self center, how much play in steering, etc. it could be any number of things and I fixed/replaced them all before finding my rear spring wasnt securely attached to frame. yes, a bump in the road or a semi passing me would instantly throw me out of my lane
    I still can't believe how bad that was. Held together by hopes and wishes.
    Gregg Groff


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    1968 Chevy G20 108 panel Now with 454 power!

    1965 Chevy G10 panel- OHC Pontiac inline 6

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    VCVC Member jrinaman's Avatar
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    Quote Originally Posted by Vanner68 View Post
    I still can't believe how bad that was. Held together by hopes and wishes.
    I still cant believe I looked MANY times plus you and several others too, yet we could not see it.
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    VCVC Member joyrde's Avatar
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    Quote Originally Posted by woody bovie View Post
    hi i have a 69 g20 and when i hit a bump in the road it wants to jump lanes on me. Does anyone know what cause this? thanks
    read the following - - - note the adjustment, worn part references

    https://en.wikipedia.org/wiki/Bump_steer

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    I added a steering damper and new quality shocks and it helped tremendously.
    Tnicean

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    Van Addict Leroy Jackson's Avatar
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    Quote Originally Posted by woody bovie View Post
    hi i have a 69 g20 and when i hit a bump in the road it wants to jump lanes on me. Does anyone know what cause this? thanks

    Mine would do this.

    Ended up replacing every bushing, tightening up the steering box and installing a return to center damper.

    Added shims to correct the caster and installed rims set deeper inward.

    Also replaced the drag brace and tie rods with custom adjustable units.

    Replaced the king pins too.
    The Raped Ape
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