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Thread: Frequency/harmonic

  1. #1
    Join Date
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    Frequency/harmonic

    Hey all

    I was driving my 110 trayback from GC to Toowoomba. In one of the many 100km/h - 80km/h sections, I was slowing under engine braking, down to about 80km/h when the front right hit a fair pot hole. This sent that wheel into a horrible up/down vibration/harmonic where I thought the rim must have a huge bend in it or something come VERY loose or wrong. As I slowed further under braking, it slowed and only stopped at about 15km/h.....


    poof, gone like that...drove off and all good. This has happend once before.

    Im guessing its just all things aligning so that it was set into its natural frequency.

    not a nice feel though

  2. #2
    Bearman's Avatar
    Bearman is offline TopicToaster Gold Subscriber
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    You need to reco your swivel housings. Sounds like the correct symptoms when you have a bit of slack in the railko bush on the top. Possibly can be fixed by removing a shim or two from under the pin and tightening it a bit.
    Cheers......Brian
    1985 110 V8 County
    1998 110 Perentie GS Cargo 6X6 ARN 202516 (Brutus)

  3. #3
    JDNSW's Avatar
    JDNSW is offline RoverLord Silver Subscriber
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    Almost certainly swivels, although other problems can exacerbate it. (wheel balance, tie rod ends, loose wheel bearings, steering damper etc)

    John
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

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