fred wrote:
In article , MuddyMike
writes

"Jim K" wrote in message
...
recently asked re anti roll bar drop links "knocking" and was
pleasantly surprised to find it wasthe ARB bushes that were sh@gged.
Duly replaced with heavy duty items a day ago.

However now I'm getting a "knobbly tyre on road" type noise *in* the
car at 30mph or above - speed related, but not engine related....

Can changing ARB bushes affect tracking for e.g.? or is the firmer
material of the HD bushes likely to be transferring more road vibes
into the "chassis" ? or something else??


I assume ARB means Anti Roll Bar. If so then no, the ARB does nothing to
control tracking or any other part of the suspension geometry. With most
vehicle you can throw them away and the only difference will be
increased
body roll.

Very common for the anti-roll bar to control the front to back position
of the wheels in a simple MacPherson strut system and so the toeing.

I've not seen that, but its seldom that an ARB does not exert some force
on the suspension links in some direction or other. If any of the fore
and aft control bushes have any play, that will change the tracking.