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Thread: What Shock absorbers to use?

  1. #1
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    Angry What Shock absorbers to use?

    Hi Blokes,
    I have just recently discovered a problem while driving my RRC on a country bitumen road, the shockies that I have fitted (Koni) have no way of controlling axle hop when going over a very moderate depression in the bitumen, anything over 75Kph starts the axle hopping about 3 to four times and shakes the old girl to the point where it is extremely uncomfortable for any passengers inside the cab. If I try to negotiate a sweeping bend in the road and a depression is found with one or more wheels the old girl just literally hops her way around the bend (very unnerving).
    The model number of the shocks are 8420 1190spx Rear and 8420 1181spx on the front.
    The springs are from Rangie Spares and set to a height of 50mm above standard while carrying 250-300 Kl/gms of weight. The front springs are set to a height of 40mm above standard while carrying the extra weight of a steel bullbar.
    These springs are carrying this weight perfectly as have all the other springs I have purchased from Rangie Spares.
    Has anyone else had a similar problem and how did you get over it?
    At this point in time I am ready to ditch the Koni's and replace them with Bilsteins from Rangie Spares but thought I might get some input from someone who may have had a similar problem.

  2. #2
    Join Date
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    Check the shock rubbers first, any wear there will allow undamped movement.

    If they are ok get the Koni's revalved and rebuilt.

    Proven Products in Albury or Toperformance somewhere in Melbourne can do it.

    Actually, is it the front or rear axle?

  3. #3
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    Shockies

    Hi Blokes again,
    a couple of things I should have mentioned in my first thread,
    the whole suspension system is brand new and only has done a couple of thousand Kay's at the most and do mean "new" every bush and bolt etc has been replaced.
    I should also mention Rangie Spares did not supply the shocks that I wanted as they were out of the Bilsteins at the time of this upgrade and I purchased the Koni's my self from a local supplier.
    Thanks Swaggie for your input I can fully appreciate the problems connected with a chopped out shockie bushs, I have had heaps of them in the past but this is much worse than that.

    Regards:-
    Patrick M

  4. #4
    DAMINK Guest
    Tie rod ends?

  5. #5
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    Shockies.

    Hi Blokes,
    Another thing I should have mentioned in my first and second threat was that all the steering has all been done as well, new ball joints, S/box rebuilt etc, etc.

  6. #6
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    Toe out? Swivel preload? Panhard bushes? Rear control arm bushes?

  7. #7
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    If they are new it won't be the shocks.

    To add to Damien's list, wheel balance can do it too, as can a faulty steering damper.

  8. #8
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    Shockies

    Hi Blokes,
    I probably should have mentioned in my first, second and third thread that the tyres are brand new and balanced properly. I thought that it might be the steering damper but the problem comes from the back as well as the front. "Axle Hop". I reduced the tyre pressure in the front by 7psi and that improved it a bit, but it's still there. Going from that rate of pressure reduction I would have to be down to about 18 or 20psi before the problem goes away which is not helping fuel consumption or tyre longevity. I normally run them at 32-35psi depending on the conditions.
    Sorry blokes all that you have mentioned has been done with the suspension/steering rebuild.
    Yep, keeps coming back to the shockies.
    Thanks Blokes.

  9. #9
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    Before spending your hard earned on more shocks why don’t you try taking the front shocks off and see if it changes
    By the sound of it you should know immediately if the shocks are the problem
    Phil B

    Custodian of:
    1974 S3 swb wagon (sold)
    1978 S3 swb canvas
    48 749 '88 4x4 Perentie
    1985 County with 4BD1T

  10. #10
    Join Date
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    Don’t buy new shocks yet.
    Just re reading your post those are symptoms of the “death wobbles”
    Just google “death wobbles “ and there is lots of advise to repair it.
    I had similar issues and it was the swivel preload to low and the panhard rod bushes. Use only OEM rubber bushes IME
    Phil B

    Custodian of:
    1974 S3 swb wagon (sold)
    1978 S3 swb canvas
    48 749 '88 4x4 Perentie
    1985 County with 4BD1T

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