[Healeys] Suspension Changes & Now Front End Vibration

Alan Seigrist healey.nut at gmail.com
Sun May 29 16:45:03 MDT 2011


When was the last time you rebuilt your shocks?

On 5/30/11, John Soderling <bighealey at astound.net> wrote:
> Hi,
>
> Two weeks ago I replaced the King-pin/trunnion oilite thrust washers with
> Torrington needle-bearings on my BN4 and what a nice reduction in the
> steering
> effort, especially below 40 MPH.  I also replaced the rubber top link bushes
> connecting the trunnion with the shock arms with the hard polyurethane
> bushings.
>
> I've noticed that the front suspension feels a little harsher and I now have
> a
> front end vibration causing scuttle-shake over 55/60 MPH on pavements that
> are
> rough textured or wavy that was not there before the work.  I'm not talking
> about really bad chuck-hole type pavement but pavements that are not nice
> and
> smooth.  I had my wire wheel guy check the on-car-balancing of my front
> tires
> and he said they are spot on good.  The king-pins are good and when
> installing
> the needle-bearings the up-lift was set at less 0.002".  My first thought is
> that this vibration is due to the very hard polyurethane bushings.
>
> Has anyone who has switched to the hard top trunnion bushings had this
> experience?  Thanks for any thoughts based on experience.
>
> John Soderling & Erika the Red
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