If the shock has a bit of slack between up and down motion, then you can get
vibration. It's not enough that the shock can still dampen movement, what
you don't want is something like a 1/8" or 1/4" of free play up or down
before the dampening kicks in. If that happens you can get a little bit of
the harmonic vibration...
On Mon, May 30, 2011 at 10:32 AM, John Soderling <bighealey@astound.net>wrote:
> Alan,
> One shock was rebuilt two years ago (5,000 miles) and the other 11 years
> ago (45,000 miles). They were working fine two weeks ago. When I installed
> the Torrington bearings and the Polyurethane bushes and had the car jacked
> up, I did a manual check of the shock's action, checked the fluid level
> (fine) and the mounting bolts (tighten one a little more). So the shocks
> are good. I'm going to order the original rubber type trunnion bushes and
> install them and see if that solves the problem. I'm also thinking that
> these hard plastic type bushes have got to transmit more "shock" to and be
> harder on the shock arm/housing connections and the mounting bolts.
> Thanks.
> Vrooom vrooom
> John
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